Vessel View - McCausland Center
Contents
1. 65 Storing rotation of the view 67 Workflow Workflow of a Carotis examination 69 2 Vessel View gives you LI 3D view in VRT or MIP mode supple E mented by MPR or MIP slice images Common VRT gallery with 3D task card Clip planes and VOI tool for processing a volume Semi and fully automatic generation of vessel paths with segmentation Manual path definition and segmenta tion vessel tube Vessel navigator for generating and dis playing a ribbon MPR for special evalua tion MIP view in vessel navigator Automatic preparation of a stenosis evaluation Distance curve area and angle mea surement Automatic determination and measure ment of vessel cross section Object list for overview and manage ment of created objects Automatic generation of axial vessel slice images Transfer of image data to graphic slice positioning GSP Recording of action sequences and rota tions of the view We are pleased to welcome you as a user of the powerful software syngo MR used to operate Siemens MAGNETOM MR systems This Quick Guide will help you with evalua tion of vessel images using Vessel View It focuses on simple and fast performance of typical actions This Quick Guide is only valid in conjunction with the system manual and the safety information contained therein Step by step instructions are given on the right Supplementary figures and notes can be found on the left2. mm 120 2 mm mm mm 156 0 mm mm mm SJUSWIINSes that already exists you can create a new 2 If you want to add another path to a path path by repeating semi automatic segmen tation If the two linked paths are not contiguous the gap will be bridged by the shortest con necting line Managing paths The object list on the Measurements subtask card shows each path with a unique name You can change the name of a path store notes on each path or delete paths you no longer need Connecting paths You can create a new contiguous path from two individual paths using the connection tool lt gt Click the first path to be linked in the object list lt Hold the Ctrl key on your keyboard pressed and click the second path to be linked Both paths are now marked Click the Connect button Volume image view Slice image view Slice image view not vessel orthogo vessel orthogonal nal can only move the path point of intersection with the image plane The path is updated automatically 2 In the vessel orthogonal slice image you Changing the course of a path You can change the position of the path by moving inserting or removing path points lt Select the path to be edited in the volume image or object list lt gt Click the Edit path button on the Measu rements subtask card Or Select the Edit path option from Son the pop up menu for the s
3. A full guide to using the software syngo MR is provided in the User Manual and in the comprehensive Online Help To call up the Online Help press F1 on your keyboard or click the Help button in the active dialog box The Vessel View Quick Guide contains the following topics L Loading and viewing Images L Defining vessels IJ Evaluating vessels LI Saving and documenting evaluations I Workflow of a Carotis examination If you have not yet opened Vessel View the application opens as soon as you load images Requirements You cannot open several series simulta neously in Vessel View Any series you open must meet the following requirements IJ The series must comprise at least three images IJ All images must be of the same patient Li All images must be parallel and acquired along one axis IJ Each image must have a different slice position Ll The distance between two adjacent slices must not exceed 5 times the average slice distance _1 Allimages must have been recorded within 30 minutes Loading images lt Open the Patient Browser and select an image series lt Click the Vessel View button on the tool bar of the Patient Browser Or lt Select Applications gt Vessel View from the menu bar of the Patient Browser 10 Edit Path igi oomi Fan WIP Mode Translucent Accept Contour Edit Contour Freehand ROI Send to GSP Layout of Vessel View tas
4. Magnetic Resonance Vessel View Versions syngo MR 2004V 2005E 2006T Quick Guide SIEMENS medical Manufacturer s note 4 This product bears a CE marking in accor C dance with the provisions of council directive 0123 93 42 EEC of June 14th 1993 for medical devices The CE marking applies only to medico tech nical products medical products introduced in connection with the above mentioned com prehensive EC directives System type Serial number Gradient configura tion Connected cam eras Software options Customer service phone numbers Introduction Loading and Viewing Images Reguirements ceesre 9 Loading images nnnennni 9 Setting the image view 13 Defining Vessels Removing unwanted parts onbe magen e 21 Creating and editing paths 25 Evaluating Vessels Setting vessel orthogonal ENAU E a eee 37 Generating axial vessel section A AG ES a t 39 Evaluation in the vessel navigator 41 Performing measurements 49 Saving and Documenting i Saving and loading a session 57 Saving IMAGES nnnnnnnennna 59 Creating evaluation tables 61 Filming images mmn 61 Transferring images to the Viewing ASK CONG eee eee eee eee 63 Sending image data for graphic slice positioning GSP 63 Recording a seguence of actions
5. Repeated semi automatic creation of paths You can create paths semi automatically on data sets that have already been segmented You can use this method to define additional vessels The result of the new segmentation is added to the volume already defined When you start path planning the volume parts hidden by vessel segmentation are displayed again exposing the entire volume for setting land marks Fully automatic path creation Fully automatic path creation defines the entire vessel tree Display the Measurements subtask card in the evaluation area lt Click the Automatic Path Creation but ton Or lt Open the tool list for path planning with the arrow and select Semi Auto Segmenta tion Paths are created fully automatically along the vessel tree The tissue that does not belong to the vessel tree is hidden and trans lucent mode is activated lt gt Setthe visibility of the hidden volume parts to the required value with the Fader slider on the VOI subtask card How well a manually created path repre sents the actual course of the blood vessel depends on the number of path points used and how accurately they are positioned You can use all image segments for setting path points Manual Path Creation XI Please place control points by clicking either on the MPR segments or VRT Press Apply when done No seed points placed Apply Manual path planning For manual path creati
6. Navigator Curves gt Rotating a volume image lt Rotate the volume image in the desired direction keeping the mouse button pressed To gain an overview allow the volume to rotate automatically lt Select the volume segment and click this button in the Movie subtask card lt Set a rotation speed with the slider lt To stop rotation click the Stop button E The image last visible is displayed again Orienting the volume image lt gt Click the orientation cube surface that you want to place in the foreground of your vol ume image Or lt Double click anywhere on the orientation cube to display the volume image both from the front and in its original size Setting view options The Configure menu allows you to enter basic settings for working with Vessel View This is where you activate checkmark or deactivate no checkmark modes or select particular settings from the submenu 18 The MIP mode is especially suitable for defining VOls image segments 2 You cannot draw VOI contours in slice Removing unwanted parts of the image Defining and cutting out VOIs lt Orient the volume image for easiest trac Ing lt Click the Draw Contour button on the VOI las subtask card lt Draw round the volume area of interest keeping the mouse button pressed lt Double click to complete the contour lt Click the Include button to expose the vol ume inside the cont
7. planes again deactivate vessel orthogonal orientation again Unclick the Vessel Orthogonal button Axial Cuts Range Distance between images The starting and end position are defined in millimeters from the beginning of the path position by the same amount move the slider using the middle handle Q If you want to change the starting and end L 38 Generating axial vessel section images You can document a defined vessel with a series of axial vessel section images in MPR format lt Select the path of the vessel from the object list or the volume image lt Click on the Axial Cuts button in the lower part of the control area The Axial Cuts dialog box is opened with default settings A symbolic preview of the section image series is shown in the volume image lt Drag the left slider handle to the required start position s Drag the right slider handle to the required end position lt Type the interval between images The graphic display of the section image planes in the volume image is updated Start gt Click Start The axial MPR section images are calculated and stored in the database as a series The number of images automatically results from the distance between the starting and end position and the image interval JA Wi 206 EEA JoyeBiaen jesse In MPR mode the image plane rotates in 5 steps in MIP mode in 45 s
8. the two upper slice images stacks cannot be scrolled and the reference lines cannot be moved With this control area button you me can show or hide the reference A lines You can put the slice image planes into a standard orientation with this button on the Orienta tion subtask card Scrolling through the slice image stacks You can scroll slice by slice through an image stack with the dog ear lt gt Click on the dog ear in the image stack to scroll back lt Click into the empty corner in the image stack to scroll forward You can move the image planes steplessly with the reference lines lt Move the mouse pointer onto the refer ence line near the center of the image lt Move the line to the desired clip position keeping the mouse button pressed Rotating the slice image plane lt Move the mouse pointer onto the refer ence line at the image edge lt Rotate the line in the desired direction keeping the mouse button pressed 18 If zoom pan mode is active deactivate it if you want to rotate the volume image manu ally Use this button to store the image sequence of a 360 rotation in the database or in an avi film file Configure System Options Show Magnifier Window Show All Measurements Show All Paths Show Bounding Box Show MPR in VRT Show Ribbons in VRT Eocus Pointer Size Show Image Text Show Profile Curve Measurement List gt Vessel
9. AVI file T2 images J T images The maximum number of 72 images results in the smallest viewing angle interval of 5 between two consecutive images Storing rotation of the view You can store automatic rotation of the vessel navigator view and automatic rotation of the volume as an image sequence You can spec ify whether to save the images in a new series in the database or in an avi movie file in the file system lt gt Select the image segment for the record ing the volume segment or the vessel nav igator lt gt Display the Movie subtask card in the con trol area lt Click the Record button on the Movie sub g task card The Save As dialog box opens lt Enter a name for the movie file To save the image sequence to the data base select the Save 360 rotation to database item from the Save As selection list Or To save the image sequence to the data base select the Save 360 Rotation to AVI File item from the Save As selection list lt gt Select the number of images with the slider Save ie Click Save The dialog box closes and the image sequence is stored Vessel View Wessel View 68 Workflow of a Carotis examination 1 Loading Images Load the image series from the Patient Browser into the Vessel View task card gt Page 9 2 Optimizing the volume view Select a suitable VRT parameter set from the VRT Gallery to dis
10. a mea surement is entered in the object list Measuring angles Set three measurement points in the image segments for angle measurement the apex and one point for each leg of the angle lt Click the Measure Angle button on the Measurements subtask card lt Click the end point for the first side lt gt Click the apex lt Click the end point for the second side The angle is calculated and the angle mea surement is put in the object list Save Session Session name Cancel Session data are restored only by loading the corresponding image series You can delete sessions you no longer need from the series in the Patient Brow ser Save Load Saving and loading a session You can save the current version of your work on an image series Saving the session Select File gt Save Session from the main menu The Session Management dialog box opens Enter a name for the session in the Ses sion Name input field Click Save The session data for the image series will be stored in the database Restoring a session lt gt Enter the image series for the session Select File gt Load Session from the main menu The dialog box for loading a session opens lt gt Select the session that you want to restore from the list of existing session data Click Load Vessel View returns to the status when the session was saved Patient VVAbdom Aorta Aneurysm Mod
11. ality CT Exam date 04 05 01 12 12 22 Images 1 Image type Image s of GV Reading Physician Comment OMNIPAQUE Save all images in one series AbdRoutine vl Group all images by type AbdRoutine GV Collection If you do not want to change the storage settings click this button to save Now the settings that you last made in the Save As dialog box apply Saving images To check the storage settings before each save and make any necessary changes pro ceed as follows lt gt Select the image segment you want to save lt Click the Save As button in the control area The Save As dialog box opens lt Activate the relevant option to specify whether you want to create one series for allimages or a separate series for each image type lt Enter the name of the new series in the combo box next to the activated option In addition to the basic storage settings you can provide additional information about the series lt Enter the name of the reporting physician or select a name from the selection list s Enter a comment about the images OK Click OK to save the image You can load the tables into the Viewing task card via the Patient Browser or trans fer them to the Filming task card for print ing Creating evaluation tables The report generator generates two tables _1 Measurements Measurements sorted by type LJ Component description Created paths and meas
12. ce thickness selectable 3 MIP projection of the full volume 4 5 MIP Thin slice thickness selectable VRT for volume image display lt Click the relevant button or select the mode from the Type menu Selecting a VRT parameter set for volume image lt Right click the VRT button on the Type subtask card of the control area The VRT Definition amp Gallery dialog box opens with the VRT Gallery subtask card If the check box on the subtask card is deacti vated the VRT gallery is automatically dis played when you start Vessel View lt Select a suitable VRT parameter set for your evaluation The VRT volume image is displayed including the respective tissue class parameters Close the dialog box 8 a lt 4 gt 24 Enlarging an image segment Select the image segment to be enlarged Click the Full Screen button in the control area A small image segment is transferred to the center of the task card This is how the center image segment is enlarged to full screen height and restored to its original size Zooming and panning lt Click the Zoom Pan button in the control area Or Select Zoom Pan from the pop u pop up Sos menu LJ lt To zoom move the mouse at the image edge keeping the mouse button pressed Or lt To pan the image move the mouse keep ing the mouse button pressed in the image center In vessel orthogonal orientation
13. e already set To activate or deactivate translu Soa cent mode manually select or deselect the Translucent option in the pop up menu Creating and editing paths Semi automatic path planning Display the Measurements subtask card in the evaluation area Click the Semi Automatic Path Creation button Or Open the tool list for path planning with the arrow and select Semi Auto Segmenta tion Semip MEU The dialog box for controlling semi automatic Ai path creation opens Set at least two landmarks by clicking the mouse in the vessel section you want to segment one at the beginning and one at the end of the section Start lt gt Start segmentation The segmentation algorithm automatically finds the vessel limits and determines the vessel centerline path After segmentation transparency is set to 85 translucent mode in the VRT settings to make the paths more visible in the volume image Using the Fader slider on subtask card VOI you can set the visibility of the volume parts hidden during segmentation to values between 0 fully hidden and 100 fully vis ible Move the slider to the right to increase vis mls ibility or to the left to reduce it gg Limit the volume to be evaluated to one VOI to increase the efficiency of fully automatic segmentation gt Page 21 Defining and cutting out VOls Manual A uten a j i
14. elected path The path points are now visible To select a path point click the point The selected path point is highlighted with a color and the image views change to the posi tion of the point lt To delete a selected path point press the Del key lt gt Click a point on the path to insert a path point To move a path point in the volume image lt gt Click directly on the path point and drag it to the desired position using the mouse To move a path point in a slice image lt Move the mouse pointer toward the path point until the shape of the mouse pointer changes lt Drag the path point to the required position holding the mouse button down upper slice images stacks cannot be scrolled and the reference lines cannot be moved 2 In vessel orthogonal orientation the two If you have created a new path the slice image segments are automatically set in the orthogonal vessel orientation Setting vessel orthogonal orienta tion In vessel orthogonal orientation the slice image planes are automatically aligned in the vessel path The lower slice image plane lies perpendicular to the vessel path and shows the vessel cross section All three image planes are perpendicular to each other lt Select the path of the vessel from the object list or the volume image Click the Vessel Orthogonal button on the Orientation subtask card If you want to be able to move the slice image
15. etely blocked Evaluated flags cannot be moved until the current stenosis evaluation is complete As soon as all flags are evaluated they are enabled again and can be used to evaluate other vessel stenoses 7 e bar i 5 i TIM re 736 Performing measurements Distance measurement in the image seg ments Click the Distance measurement button on the Measurements subtask card lt Drag out the line to be measured in the slice image Or lt In the volume image click the starting point and then the end point of the mea surement Distance measurement in the vessel naviga tor In the vessel navigator you always measure distances that are perpendicular to the vessel axis e g vessel diameter lt Set the required view in the vessel naviga tor lt Click the Distance Measurement button lt Drag out the line to be measured Post processing a distance measurement Select the measurement from the object list The measurement is highlighted in the image segments lt Move the measurement points to be cor rected to the reguired position with the mouse The measurement is updated 49 The total length of a path and therefore the associated vessel is given in the object list surement by setting further measuring points on the path The path line between the most recent point and the end point of the last measurement is measured and entered as a new curved measuremen
16. k card 1 Slice image segments MPR MPR Thick display MIP or MIP Thin display 2 Volume image segment VRT or MIP display 3 Control area 4 Evaluation area Depending on your task you can select any of the following functions from the Vessel View pop up menu LJ Edit Path switches path editing mode for the selected path on or off LJ Zoom Pan switches zoom pan mode on or off 2 MIP Mode switches MIP mode for the vol ume image on or off q Translucent activates translucent view of segmented vessels in the volume image 1 Accept Contour accepts a contour sug gestion in the lower slice image segment as the area measurement LI Edit Contour activates or deactivates change contour mode for a contour in the lower slice image segment _1 Freehand ROI activates or deactivates draw mode in the lower slice image LJ Send to GSP transfers the image coordi nates of the selected MPR segment to the Examination task card for graphic slice positioning 11 You can set the slice thickness for A MPR Thick and MIP Thin by right LS clicking the button YRT Definition amp Gallery 4 Do not show on patient load You can edit VRT parameters in detail on the Definition tab card 12 Close Setting the image view Switching display modes Depending on which segments you are work ing on the following display modes are avail able to you on the Type task card 1 MPR 2 MPR Thick sli
17. movie avi Filename VesselVienXYZ Save As Save 360 rotation to AVI file v Cancel Save 360 rotation to AVI file Save 360 rotation to database T2 images Record YRT interaction to AVI file k You can use the Pause button to interrupt recording briefly and then il resume it Fi Save Recording a seguence of actions You can record actions in a volume segment in an avi film file lt Click the Record button on the Movie sub task card The Save As dialog box opens lt Enter a name for the movie file Selectthe Record VRT interaction to AVI file item from the Save As selection list Click Save The dialog box closes and recording starts lt Perform the actions to be recorded in the volume segment lt gt Click the Stop button to stop recording An avi movie file can be replayed on other systems using any multimedia software The image sequence in the volume seg ment is obtained by rotating the volume about its vertical axis The image sequence in the vessel naviga tor is obtained by rotating the image plane flat ribbon about the vessel axis Save As Save 360 rotation to AVI file x Cancel Save 360 rotation to AVI file Save 360 rotation to database k Record YRT interaction to AVI file 72 images Save As Save 360 rotation to AVI file x Cancel Save 360 rotation to AVI file Save 360 rotation to database A Record VRT interaction to
18. on you need to set all path points by hand No segmentation algo rithm is executed Display the Measurements subtask card in the evaluation area p M lt Click the Automatic Path Creation but i ton Or lt Open the tool list for path planning with the arrow and select Manual Path Creation ma The dialog box for controlling manual path MEIE creation opens Automa lt Set a path point at the beginning of the vessel lt Set an additional path point at the vessel center if the direction of the vessel changes Apply To complete path creation click Apply lt Tomake the path line in the volume Sonu i image easier to see select the Translucent option from the pop up menu You can select any radius between O and 50 mm for the vessel tube The tube should fully include the vessel Defining vessels You can expose vessels with a path as a tube shaped VOI lt Select the path of the vessel that you want to expose from the object list or in the vol ume image lt Click the Tube Mode button on the VOI i subtask card of the control area The vessel tube will be displayed with a trans parent surface in the volume image lt Set the tube radius to the required value lt gt Click the Include button to expose the ves E sel tube f Path 01 Ca Normal A i v Minimum ul Path 02 i Minimum ul Path 04 94 0 mm mm mm 60 3 mm mm
19. our Or lt Click the Exclude button to hide the vol ume inside the contour E4 a The VOI is cut and draw mode deactivated Hold down the Ctrl key to move all visible clip planes simultaneously Hold down the Shift key to move all clip planes freely Using clip planes You can move the clip planes between areas of interest and hidden areas The volume out side the clip planes is hidden lt Click the clip planes that you want to use on the Clip subtask card Ga gt lt In the volume image place the mouse pointer on the clip plane and move the mouse forward or back to move the plane lt Drag the edge point to tilt the plane lt Click the highlighted clip planes on the F cube to hide them again The clip planes are still active but no longer visible Resetting clip planes lt Click the button on the Clip subtask card All clip planes return to their original position The full volume is visible again g The button for the segmentation tool you last used is offered as the default next to the arrow Semi Automatic Path Creation XI Please place the seed points You can click either on the MPR segments or on the VRT Press the Start button when done No seed points placed You can use all image segments for setting landmarks You can change the views as much as you want between setting landmarks You can move or delete landmarks that ar
20. play the vessels in the vol ume image clearly Page 13 If necessary optimize the individual parame ters in the VRT Definition dialog box 3 Defining and segmenting a path Perform semi automatic segmentation To mark a vessel simply set a starting point at the beginning and end of the vessel Page 25 The path is automatically defined and the segmentation algorithm performed 4 Editing the path Rotate the volume move the slice image planes and zoom pan to make the path clearly visible in the image views Check whether the path runs through the center of the vessel If necessary activate path editing mode and correct the position ofthe path line gt Page 35 70 iS bintin eT AE E E F a maA OSES A 5 Evaluating the vessel Start the vessel navigator and rotate the image plane of the view into a suitable posi tion gt Page 41 Change the flag number for stenosis evalua tion from two default setting to three if you want to compare the stenosis with two healthy vessel locations Check and optimize the position of the flags Measure the cross sectional area of the ves sel at the flag positions Accept the automati cally generated contour suggestion or draw in a new contour The cross sectional measure ments in the stenosis minimum flag are used to calculate the degree of stenosis that is then displayed next to the stenosis flag Normal A and if neces
21. sary flag Normal B Page 45 If necessary perform additional stenosis eval uations and measurements in the vessel nav igator in the slice image segments orin the volume segment The Measurements and Vessel Navigator subtask cards provide measurement functions for distances curves angles and surfaces gt Page 49 ff 6 Saving data Using the Create Report function save a table containing all evaluation results as a DICOM image in the database gt Page 61 To represent your findings use the Record function on the Movie subtask card Use this function to store rotation of the volume or ves sel navigator view as an image sequence in the database or in an AVI movie file in the file system Page 67 0123 Siemens reserves the right to modify the design and specifications contained herein without prior notice Please contact your local Siemens Sales Repre sentative for the most up to date information NOTICE Original images always lose a certain amount of detail when reproduced 2005 Siemens AG All rights reserved Siemens AG Wittelsbacherplatz 2 80333 Munchen Germany Contact Information Siemens AG Medical Solutions Magnetic Resonance HenkestraBe 127 91052 Erlangen Germany Telephone 49 9131 84 0 www SiemensMedical com DokuMR med siemens de Print No MR 03003 622 03 01 02 Printed in Germany AG 09 05
22. sel cross section One vessel contour is always drawn in the axial slice image segment in vessel orthogo nal orientation You can apply this automati cally generated contour to area measure ments in the vessel navigator Switch to orthogonal vessel orientation if not already active lt Move the focus pointer to the point to be measured on the vessel The axial slice image with the vessel contour is updated lt gt Click the Accept Contour button in the vessel navigator Or if the contour suggestion is not suitable s Draw a new contour in the axial slice image gt Page 55 Measuring an area Or Switch to contour editing mode move the contour line to the correct position and then accept the contour An area measurement is created and linked to the path Area 141 1 mm A MlinDiames mm Y MaxDiam43 3mm MEET EE Contour editing mode allows you to sing JD change the shape of an existing contour and then apply it The asso ciated measurement values are recalculated automatically gt Measuring an area You can also perform area measurement independently of a path s Set a view suitable for the intended area measurement in the axial slice image seg ment lt Click the Draw Contour button in the ves sel navigator s Draw the contour in the axial slice image using the mouse lt Double click to complete the contour The contour is evaluated and the are
23. t in the object list 2 You can continue curved distance mea To end curved distance measurement unclick the Curved Distance Measure ment button 2 If necessary you can edit a curved distance measurement by selecting the measure ment and moving the measurement points you wish to correct Curved distance measurement in the vessel navigator With a curved distance measurement you can determine the length of a vessel section along the path lt Select a path and call up the vessel navi gator Click the Measure curved distance but ton s Drag a line from the starting point to the end point of the measurement keeping the mouse button pressed The curved distance measurement is trans ferred to the object list Curved distance measurement in the image segments lt Call up the Measurements function card and select the required path in the object list Click the Measure curved distance but ton lt Click the starting point of the curved dis tance measurement in the volume image lt Click the end point of the curved distance measurement The shortest distance between the two points is calculated with the path line and entered in the object list as the curved distance mea surement 92 MA 30 VAT Vesse a L 1 3 11 11 4911 M 907 SP F715 Trae Sag 150 Gorf kBj w 033 c 43 Area 14101 mm MinDiamis mm im FP hlaxDiam 43 3mmim DEEM E Measuring ves
24. t posi tion drag it to the location you wish to evaluate using the mouse To move a flag in the volume a ja Fa image click directly on the flag ring and move it to the reguired position with the mouse Stenosis evaluation with flags The vessel navigator automatically suggests a point on the vessel for stenosis evaluation The suspected stenosis and points for com parison measurements are marked by flags 1 Flag A before stenosis normal A 2 Minimum flag Only when three flags are activated 3 Flag B after stenosis normal B As soon as you have created a path a con tour suggestion is made for the vessel cross section in the lower slice image segment at the position of the minimum flag O lt Check the contour suggestion and click the A Accept Contour button in the vessel navi gator The contour is evaluated and the measured values for the minimum flag entered in the object list Now the focus pointer automati cally moves to the comparison flag lt Repeat flag acceptance for flag Normal A and possibly Normal B If you use two normal flags the degree of stenosis is calculated using the mean value of the two comparison measurements The degree of stenosis is calculated degree of stenosis 1 measured value stenosis flag measured value normal flag and dis played in the object list in percent It can accept values between 0 no stenosis of vessel and 100 vessel compl
25. teps You can start automatic rotation and store the image sequence on the Movie subtask card You can set the slice thickness for 4 MIP Thin as for other image seg Ry ments by right clicking the button You can window the view in the Vessel Nav igator identical to the views in the slice image segments Evaluation in the vessel navigator The vessel navigator calculates a longitudinal section through a vessel along the path flat ribbon and displays the associated MPR or MIP image Additional information is provided by the stenosis curve Setting the image view lt gt Select the path of the vessel from the object list or the volume image lt Display the Vessel Navigator subtask card in the evaluation area lt Place the focus pointer on the point of interest by mouse click or drag it there keeping the mouse button pressed F Use the Angle slider to rotate the image E plane to the required position If you want to display an MIP image of the vessel switch to display mode 4 lt Click the MIP Thin button on the Type sub t task card of the control area If the image contains too much or too little of the area surrounding the vessel decrease or increase the width of the flat ribbon ferred value and confirm with the Enter key Use this button to store the image sequence of a 360 rotation in the A database or in an avi film file SE At stenoses the area curve is extremel
26. urements with remarks lt Click the Output Table button in the con trol area The tables are stored in the local database as a new series Filming images lt gt Select the image segment view you want to transfer to the film sheet lt Click this button in the control area Or Press the Copy to Film Sheet key on the symbol keybpad Depending on the film layout selected the images are transferred directly to the camera or to the printer Or they remain on the Filming task card for processing until you manually send the images to the camera or printer nL MPR images to GSP 2 It is only possible to transfer coordinates of Transferring images to the Viewing task card After Vessel View you can transfer images to the Viewer for 2D processing or evaluation Select the image segment whose view you want to transfer to the Viewer lt Click this button in the control area m The image is stored and transferred to the Viewer task card Sending image data for graphic slice positioning GSP The coordinates transferred to GSP on the Examination task card are automatically used to measure the new slice s In a slice image segment set the MPR image whose image data you want to transfer lt gt Select Send to GSP in the pop up Son l menu of the selected image a The image coordinates are transmitted Save File As Look in E C MedComitemp CDR_OFFLINE v a ci
27. y low at aneurysms extremely high The less the three diameter curves differ at a point along the vessel the more the ves sel cross section resembles a circle a circle having the same area as the vessel 2 The equivalent diameter is the diameter of cross section Automatically rotating the vessel navigator view Click this button on the Movie subtask E card Speed lt Set a rotation speed with the slider jr lt To stop rotation click the Stop button E The image last visible is displayed again Defining a stenosis curve The stenosis curve above the vessel image gives you an overview of the cross section of the vessel and helps you locate medically rel evant vessel points You can choose one of two different representations Area representation 1 curve The curve represents the cross sectional area along the vessel Diameter representation 3 curves L Curve of the diameter maxima above LJ Curve of the equivalent diameter center IJ Curve of the diameter minima below Select the Vessel Navigator Curves option from the Configure menu and the required setting from the submenu Select whether you want to use one or two normal flags or work ki without flags with this button Contour suggestions are only shown if vessel orthogonal orien tation is active If you are not satisfied with the con tour either edit it or redraw it If a flag is not in the correc
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