Standard. Substitute Test or Procedure. Required Test or. 1 Scan Increment Accuracy. Initially and Annually Initially and Annually
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1 Manufacturer s Recommendations for Alternate Dental CBCT QA Program VaTech: Model PAX i3d, i3d Green, i3d Smart Table 6 Medical Physicist s Computed Tomography QC Survey Required Test or Item Procedure 1 Scan Increment Accuracy 2 Scan Localization Light Accuracy Frequency Substitute Test or Procedure None Not Applicable Vatech Imaging Geometry Check Phantom Page 24 Stard None Not Applicable Eccentricity Lower Specification Limit=0.97 Upper Specification Limit =1.00 Circle Area Ratio Lower Specification Limit=0.80 Upper Specification Limit= Patient Dose (Multiple Scan Average Dose MSAD or Computed Tomography Dose Index- CTDI) Constancy Test Report Appendix B The accuracy of DAP is +- 20% when compared with the values that could be measured. PHT-30LFO PaX-i3D Smart FOV: 100x85 90kVp/8mA [mgy*cm2] PHT-6500 PaX-i3D FOV: 120x90-90kVp/8mA Scan Time: 15s [mgy*cm2] Scan Time: 24s pmgy*cm2] PHT-60CFO PaX-i3D Green 16x10 High Resolution: 9.0s Green Mode: 5.9s FOV: 160x100 90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) FOV: 120x90 90kVp/*mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) FOV: 80x80-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) FOV: 80x50-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.)
2 FOV: 50x50-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) PaX-i3D Green 15x15 High Resolution: 15.0s Green Mode: 9.0s FOV: 150x150-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Resolution) FOV: 120x90-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) FOV: 80x80-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) FOV: 50x50-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High res.) PaX-i3D Green 10x8 High Resolution: 9.0s Green Mode: 5.9s FOV: 100x80-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) FOV: 80x80-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) FOV: 80x50-90kVp/8mA [mgy*cm2] (Green mode) [mgy*cm2] (High Res.) FOV: 50x50-90kVp/8mA [mgy*cm2] (Green Mode) [mgy*cm2] (High Res.) 4 Pre-Patient Collimation Accuracy PHT-30LFO (PaX-i3D Smart) Technical CBCT Alignment Guide Appendix F Pages PHT-30LFO - Collimator alignment permissible range (FOV: 100 x 85) Left Right Max. (pixel) 3
3 5 Contrast Scale PHT-6500 (PaX-i3D) Technical CBCT Collimator Alignment Guide Appendix D Pages 5-13 PHT-60CFO (PaX-i3D Green) CBCT Collimator Alignment Guide Appendix G Pages 4-6 Vatech Imaging Pages PHT Collimator alignment permissible range (FOV: 120 x 90, 80 x 80, 80 x 50, 50 x 50) Left, Right, Bottom, Top Max. (pixel) 10 PHT-60CFO Collimator alignment permissible range (FOV: 100 x 80, 80 x 80, 80 x 50, 50 x 50) Left, Right Max. (pixel) 10 Bottom, Top Max. (pixel) 12 PaX-i3D Smart A PaX-i3D A (End User phantom kit part PaX-i3D Green A CT Number for Water Vatech Imaging Pages Material Range (HU) Air (-1200 to 800) Water (-200 to 200) Teflon (800 to 1200) PaX-i3D Smart A PaX-i3D A (End User phantom kit part PaX-i3D Green A Slice Thickness None Constancy Test Report Appendix B Material Range (HU) Air (-1200 to 800) Water (-200 to 200) Teflon (800 to 1200) PaX-i3D Smart FOV (100 x 85) Stard:.200 PaX-i3D FOVs (50 x 50) Stard:.120 Application:.200 FOVs (80 x 50, 80 x 80, 120 x 90)
4 8 Field Uniformity 9 Low Contrast Resolution QA Phantom Kit User Appendix A Pages Vatech Imaging S&C Check Phantom Pages Stard:.200 PaX-i3D Green FOVs (50 x 50) Stard:.08 Application:.12 FOVs (80 x 50, 80 x 80, 100 x 80) Stard:.12 Application:.20 FOVs (120 x 90, 150 x 150, 160 x 100) Stard:.200 Subtract the minimum average value from the maximum average value among the 5 ROI s. The difference should be less than 400HU. PE cylinder: Minimum visible size 8.0mm 10 High Contrast Resolution Vatech Imaging Air Hole: Minimum visible1size 1.0mm 11 Noise S&C Check Phantom Pages Vatech Imaging Lower Specification Limit 0 Upper Specification Limit Scan Protocol Review Review of Facility Technologists QC Tests Physicist Report Recommendations Uniformity Phantom Check Pages 19-20
5
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