Vatech A9 PHT-30CSS - Homogeneity Evaluation

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5.4. Homogeneity evaluation
5.4.1. Homogeneity standards
Parameter ROI 1 ROI 2 ROI 3 Remark
Homogeneity
(Ave)
8000 or more 1200 or more
The difference between ROI 1,2
values is 10% or less
5.4.2. Phantom Specification
QUART Phantom QUART - Ball Phantom
5.4.3. Test Method
 The evaluation is conducted in the same manner as in the evaluation method in Section 3.3.
5.4.4. Test Result
Parameter
ROI 1 (600, 800) ROI 2 (2550, 800) ROI 3 (1574, 800)
Pass/Fail
Homogeneity(Ave)