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It is discovered that a patient receiving 400 cGys daily has been given 25 fractions at 77 cm SSD instead of 80 cm SSD. Instead of the prescribed 10,000 cGy, the patient received: a. 9,264 cGy b. 9,628 cGy c. 10.390 cGy d. 10,794 cGy - d. 10,794 cGy If treating a supine patient isocentrically ...

Cells are most resistant in which phase? - S With regard to Energy, Depth, Field Size, and SSD; Do PDD's increase or decrease? - increase, decrease, increase, increase Which is the resting phase after synthesis (S), but before mitosis (M)? - G2 The cummulative effective dose limit for a radiati...

What are the three components of the penumbra? - geometry, transmission, and lateral scattering Geometric Penumbra - is due to the finite source size. It is more of a concern in Co-60 machines where the source is between 1 and 2 cm in size. Transmission Penumbra - is due to the transmission of ph...

Which of the following is not one of the "major characteristics of electron beams" discussed early in the electron therapy lecture? - deep dmax depth resulting in uniform dose to deep structures such as prostate and cervix This term is defined as "the rate of energy loss per gram per centimete...