Courtesy of Philips Healthcare. All rights reserved.
Courtesy of Philips Healthcare. All rights reserved.
What is the approximate rectal V70Gy for this prostate treatment plan?
Note: Rectum = brown
Prostate
Plan evaluation
No
U
C
The V70Gy, or percent of the rectal volume receiving > 70 Gy, is approximately 20% for this treatment plan.
To calculate the V70Gy, first find the specified dose (in this example, 7000 cGy) on the X-axis of the dose volume histogram. Then find the percent volume of the corresponding structure. See the explanation image for a graphical representation.
Courtesy of Philips Healthcare. All rights reserved.
Courtesy of Philips Healthcare. All rights reserved.
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