
12. Maintenance
134
vatech A9 (Model name: PHT-30CSS) User Manual
12.4.1.3 Analyzing CT Number Phantom
1. Double-click the saved PHANTOM image in EzDent-i to run Ez3D-i.
2. In the Axial pane, double click the pane to maximize the Axial view.
4. Make the boxes on the WATER, TEFLON, and AIR area as shown below.
Try to make each box as close to 20.0 mm
2
in the area as
possible.
5. Compare the CT NUMBER average values from the WATER, TEFLON, AIR areas
with the standard.
MATERIAL
MEAN
LOWER LIMIT UPPER LIMIT
Scope
AIR
-990 HU
-1030 HU
-900 HU
IEC 61223-2-6:
5.5.4, 5.5.5
WATER
0 HU
-50 HU
50 HU
TEFLON
980 HU
900 HU
1100 HU
6. Record the mean CT Number value of each material.
8. Remove User Phantom from the PHANTOM JIG ASS’Y.
Summary of Contents for A9
Page 1: ......
Page 2: ...Notice 2 vatech A9 Model name PHT 30CSS User Manual...
Page 4: ...Notice 4 vatech A9 Model name PHT 30CSS User Manual Left blank intentionally...
Page 12: ...1 Introduction 12 vatech A9 Model name PHT 30CSS User Manual Left blank intentionally...
Page 18: ...2 General Information 18 vatech A9 Model name PHT 30CSS User Manual Left blank intentionally...
Page 124: ...10 Troubleshooting 124 vatech A9 Model name PHT 30CSS User Manual Left blank intentionally...
Page 140: ...12 Maintenance 140 vatech A9 Model name PHT 30CSS User Manual Left blank intentionally...
Page 170: ...15 Appendices 170 vatech A9 Model name PHT 30CSS User Manual...
Page 194: ......
Page 196: ......