ABR Practice Exam Question 6 – D90/V100 Prostate Seed Implant

August 30, 2009 · Written by MDPhysics.com · mdphysicsblog@gmail.com

From a post-plan CT following a prostate seed implant, a physicist reported that D90 is equal to 80% of the prescribed dose and V100 is 95. What does he means by that statement?

1- The minimum dose to 90% of the target volume is equal to 80% of prescribed dose; and, 100% of the target volume receives 95% of prescribed dose.

2- The 90% isodose line covers 80% of the target volume; and, 95% of the target volume receives 100% of the prescribed dose.

3- 100% of the target volume receives 95% of the prescribed dose; and, the 90% isodose line covers 80% of the target volume.

4- The minimum dose to 90% of the target volume is equal to 80% of prescribed dose; and, 95% of the target volume receives 100% of the dose.

Click here for the answer to ABR Practice Exam Question 6

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