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A Patient Is Being Treated on the 18-MV Beam to an AP/PA

Question 30

Multiple Choice

A patient is being treated on the 18-MV beam to an AP/PA stomach (midline) .The collimator setting is 12 × 12 with no blocks.The dose is 4400 cGy/22 fractions.The separation is 24 cm.The cord is 4 cm from the PA.What dose is delivered to the spinal cord?


A) 206.4 cGy
B) 180 cGy
C) 220 cGy
D) 133.7 cGy

Correct Answer:

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