YES OR NO AGREE OR DISAGREE COMMENTS Imaging Detector
Contents
1. frequency State dose required to reproduce this curve 14 Supply the DQE curve of the proposed system as a function of the spatial frequency Specify dose required to reproduce this curve 15 State the contrast ratio for this digital device 16 Describe the methodology in obtaining the contrast ratio quoted above 17 State the absorption efficiency 18 State the thickness of the photoconductive layer 19 State the limiting Nyquist frequency of your digital system 20 Is the exposure dynamic range of your system linear 21 Specify the sampling frequency of your system At what rate is the detector sampled for information 22 Specify the time taken for the image to appear on the technologist s console after irradiation of the plate 23 Fora multiple shot exam what is the minimum time between exposures 24 In the case of an upright Bucky specify any angulations achievable 25 In the case of a table Bucky describe how cross table examinations are performed 26 Describe the type of amplification used on the acquired signal 2 Is the raw image data accessible for research purposes Digital Radiography System Schedule D Technical Requirements amp Questionnaire 28 State your service response to a defective imaging array Consider situations where dead space inactive pixels or shadowing from the previous image would be occurring Image Grayscale Processing 1 Do yo2. component
3. sufficient memory and speed 2 Indicate image processor technology and speed 4 State average image reconstruction time for the image matrix size quoted above 5 Indicate system hard disk capacity GB Indicate system hard disk capacity in na of image matrix size quoted above Indicate system back up archival secede Describe any connectivity issues 8 Specify and describe supplied short term system archival back up devices i e tape optical disk CD DVD 10 Indicate temperature and relative humidity requirements needed for the DR suite to function optimally 11 Indicate temperature and relative humidity requirements needed for the computer mechanical room Digital Radiography System Schedule D Technical Requirements amp Questionnaire monitors grid comb etc S a Indicate technology of command pe 14 Specify pixel matrix size for each ee monitor 15 Specify resolution in lp mm of all monitors 17 Luminance of each monitor will be tested during acceptance Values given above will be used as a baseline Do you agree grayscale monitors 19 What is the grayscale bit depth of each monitor including the colour monitors monitor 21 Are any proposed monitors flat panel ee 22 Describe in detail lp mm luminance etc the flat panel displays for your ec D 23 Can all computer systems proposed function concurrently If not provide a list of non concurrent PE
4. 0 Does one distinct anatomical program selection include kV focal spot mAs photocell pick up and density setting 31 Is the anatomical program user programmable without computer programming knowledge 33 Does generator have self diagnostic features built into the electronic design Describe the features if available 34 Who has access to the generator self diagnostics features 35 Are error messages displayed on the console 36 State year of FDA approval 2 ee 2 State the anode focal spot track diameter This is not the same as the anode diameter Digital Radiography System Schedule D Technical Requirements amp Questionnaire 4 Indicate anode coating used a 5 State anode diameter a 6 State the number of focal spots available and their respective sizes in terms of the latest IEC NEMA measurement standards 7 State the anode angle 9 If the x ray tube is liquid cooled state cooling liquid used 11 Describe the anode bearings metal liquid etc 12 Iste xray uwe giaswiereo 18 Indicate year ot FDA clearance ooo 14 State name otmanutcure J ooo 18 Statecountyotongn 1 Describe the base thickness of copper and aluminum available on your system Is additional copper filtration available ee the value quoted above Is the additional copper filtration user Aea ee 4 Can an additional fixed copper filtration thickness be selected at installation 5 State t
5. Digital Radiography System Schedule D Technical Requirements amp Questionnaire This section is highly technical and it is strongly recommended that you enquire if not sure as to the exact meaning of the AGREE question before submitting your response OR COMMENTS Please ensure that your answers provide as DISAGREE much detail as possible Answers to these questions are used as part of the evaluation process to determine the short list Imaging Detector 1 State the dimension of the active imaging area for an upright Bucky 2 Specify the dimension of the active imaging area for a table Bucky system 3 State the material composition of the detector 4 Specify the scintillating material 5 What is the size of an individual detecting cell 6 State the fill factor of the individual detecting cell That is what percent of the cell is actively receptive to the incoming photon fluence 7 State the number of cells in the active imaging area 8 Specify the number of reference detectors 9 Specify the location of the reference detectors 10 State the distance between individual cells 11 Specify the maximum spatial resolution 12 Specify dose to achieve the maximum spatial resolution Digital Radiography System Schedule D Technical Requirements amp Questionnaire 13 Supply the MTF curve of the proposed system This is a graph of the system performance as a function of the spatial
6. e the name and qualifications of the senior field engineer who will assist during acceptance testing should yours be the successful proposal 3 Any discrepancies or questions arising from this testing must be dealt with before first patient use Do you agree 4 The service engineer s test tool must be used if it is not supplied with this system as this will ensure accurate measurements during acceptance testing Do you agree 6 Other measurements might be made depending on the system delivered improvements or additional technical information being received by the medical physicist prior to installation The vendor will be made aware of any other measurements to be made well in advance of acceptance testing Do you agree Dose Management 1 Specify the range of the equivalent relative speed index achievable on your system 2 Describe any dose savings mechanisms on your system 4 What is the maximum exposure in mGy which will still yield an acceptable diagnostic image ee Digital Radiography System Schedule D Technical Requirements amp Questionnaire 5 What is the maximum exposure in mGy your system can accept before saturation would occur 6 Does your system have a safety mechanism to cut out if the exposure reading is too high 7 Specify the theoretical maximum relative speed your system can achieve Supply the DQE curve for this level 8 At the lowest possible mAs what is the min
7. explained in the user s manual patient demographics on the image 1 Describe how images are deleted from your system Digital Radiography System Schedule D Technical Requirements amp Questionnaire 4 Describe the monitors which would be placed in the individual clinics make model luminance resolution whether monochrome or colour etc 5 Can the same monitors used by CR in the clinical areas be used to view the DR images If so please describe the system in a Do you supply a test tool to monitor es measurements with your system Is this an option or does it come ue with the system 3 List the basic measurements which this test tool monitors 4 It is expected a quality control tool will be included with the purchase of this system Do you agree 5 Does the imaging physicist have access to the log data collected by the quality control test tool 6 It is expected that the imaging physicist will have access to the quality control log acquired by the quality control test tool Do you agree 7 Does the quality control test tool come with an associated automated analysis software Digital Radiography System Schedule D Technical Requirements amp Questionnaire 9 Describe how the technologist can keep track of repeats and rejects on your system Acceptance Testing 1 The senior engineer qualified for this modality must be present during testing Do you agree 2 Stat
8. he minimum and maximum opening dimensions of the collimator 6 If your system has sensor tracking does the collimator also adjust Digital Radiography System Schedule D Technical Requirements amp Questionnaire automatically depending on the anatomical program 8 State the composition of the collimator blades Post Processing Image Analysis and Computer Architecture 1 Specify CPU 2 Specify operating system 3 Specify architecture 4 Specify RAM supplied system 6 What is the maximum RAM available for this system 7 Is post processing software outsourced 8 Who is the developer of all software provided with the system 9 Specify storage media proposed 10 List and describe all post processing image analysis software currently available but not yet described 11 State the restrictions if any for image processing and digital acquisition to function concurrently 12 Can patient images be burned to a CD or DVD without patient demographics for teaching purposes 13 Can patient images be burned to a CD or DVD as JPEG GIF DCM BMP etc for teaching files Digital Radiography System Schedule D Technical Requirements amp Questionnaire 14 Is a CD or DVD burner supplied with your system Digital Acquisition System and Viewing Monitors The computer system quoted controlling the complete DR system must be state of the art and easily upgradable and have more than
9. imum contrast level achievable by your system State the mGy at this level 9 Is the skin exposure does value available for each image taken 10 Does this dose value become part of the patient demographics Does your proposed system have sensor tracking Is the sensor mechanism ultrasonic or ar 3 If neither ultrasonic or optical specify the sensor tracking mechanism 4 Describe the sensor tracking mechanism for your system 5 Where is the sensor located at table side 6 In the event the sensor tracking is non functional can the system still operate That is can the system still image without knowledge of the position of the x ray tube table distance Digital Radiography System Schedule D Technical Requirements amp Questionnaire 8 Does the table move when the tracking system is engaged 9 State for which exams the table would move while tracking is operational 10 In the event of a sensor malfunction is manual override an option Table 1 Indicate table height min max from floor level 2 Indicate table maximum longitudinal movement 3 Indicate table maximum lateral movement 4 Indicate maximum patient weight at maximal table extension 5 Indicate additional weight allowed to administer tabletop CPR 6 Indicate composition of tabletop 7 Specify the equivalent filtration in terms of mmAIl of the tabletop Also specify at what kVp the measurement was made 8 A
10. re the materials used in the tabletop homogeneous 9 Are there any areas in the tabletop where different densities would occur 10 If so specify exact areas of varying densities and equivalent mmAl filtration values 11 Indicate list of included accessories delivered with the system 12 Indicate name of manufacturer Pf Digital Radiography System Schedule D Technical Requirements amp Questionnaire 13 Indicate country of origin le ee 1 What is the design of the proposed generator 2 What is the power consumption for the large focal spot 3 What is the power consumption for the small focal spot 4 Does microprocessor store or visually indicate faulty operation 5 By what mechanism is the user informed of a faulty generator operation 6 Does generator include an interactive heat unit calculator 8 This will be measured during acceptance testing Number stated above will be used as a baseline measurement Do you agree 10 This will be measured during acceptance testing Number stated above will be used as a baseline measurement Do you agree 11 State voltage ripple at any kVp setting as a percentage 12 This will be measured during acceptance testing Service engineer must bring an oscilloscope during acceptance testing to make this measurement Value stated above will be used as a baseline Do you agree ameter er E E an actual measurement Digital Radiography Sys
11. tem Schedule D Technical Requirements amp Questionnaire 14 Is kV accuracy maintained if line variations of more than 10 are experienced during exposure 15 If it does not what extra component must be introduced to stabalize the system 16 In the event of more than 10 power fluctuations during use what would be the result in terms of functionality of the system 17 Are the generator kV selections in steps or continuously variable 18 What is the highest mAs selection available 19 State the range of kV for the above mAs 20 What is the lowest mAs available 21 State the kV range for the above mAs 22 Is the mAs selection of the x ray generator in steps or continuously variable 23 Does choice of radiographic values selection include kV mA time kV with automatic exposure time a b kV mAs C d other describe 24 Does generator select automatically the correct focal spot size based on the mA selected 25 Does generator include post indication ee of exposure time 26 Does generator include post indication of mAs 2 Is generator equipped with overload tube protection Digital Radiography System Schedule D Technical Requirements amp Questionnaire 28 What is the required procedure for the tube to be functional once it has overheated 29 Specify number of distinct anatomical programs provided Is program choice indicated in clear outed English 3
12. u use contrast processing software 2 Provide the generic name of the contrast processing software that you use on your system Is contrast processing a remapping of are pixel values Is contrast processing applied to a A version of the original image and then reconstructed 5 Do you use frequency processing on the acquired images 6 Do you use Fourier filters for frequency image processing 7 Do you use blurred mask subtraction for frequency image processing 8 Do you use wavelet filtering for frequency image processing 10 State the bit depth of the processed image 1 Describe all post processing software that is currently available and comes standard with the system Digital Radiography System Schedule D Technical Requirements amp Questionnaire 2 Describe all post processing software that is currently available and comes as an option with this system 3 Describe all post processing software that will become available in the near future Specify a tentative date of release and whether the software would become standard or be an option processed image 5 What is the size of the post processed image in terms of MB btn on the final processed image a image Is latitude of the image data on the ee ee Is the type of look up table parameters ee eee for processing on the image Is the incident exposure information on a image 6 Is the meaning of the image indicators clearly
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