Review Questions for Tuesday April 20, 2010

Radiotherapy examination content specifications can be found on the ARRT site.

Topic: Radiation Biology

1. When the human body is exposed to ionizing radiation, a commonly altered molecule is: ?

A. Water, H2O
B B. Deoxyribonucleic Acid, DNA
C. Ribonucleic Acid, RNA
D. Carbon Dioxide, CO2

Topic: Delivery

2. Given an initial mean seed activity of 220 uCi (microcurries), in three half lives of Palladium 103; Pd-103 the mean seed activity will measure approximately: ?

A. 217 uCi
B. 157 uCi
C. 87 uCi
D. 55 uCi

Topic: Treatment

3. A treatment is planned for 100cm SSD but is delivered at 106cm SSD. What mistake in dose delivered takes place?

A. Over treatment by: ~ 6%
B. Under treatment by: ~ 6%
C. Under treatment by: ~ 9%
D. Under treatment by: ~ 11%

Check your answers here