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

Review Questions for Monday April 19, 2010

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

Topic: Interactions

1. Photon gamma rays strike an object and scattered radiation results. The production of scattered radiation likely results from: ?

A. Compton effects
B. Bremsstralung effects
C. Characteristic effects
D. Photoelectric effects

Topic: Delivery

2. The half life of Palladium 103; Pd-103, is 17 days. Pd-103 brachytherapy seeds are typically used for: ?

A. Intrauterine HDR
B. Prostate HDR
C. Prostate LDR
D. Intrauterine LDR

Topic: Physics

3. The International units, SI given for the measurement of radioactivity are: ?

A. Coulombs
B. Grays
C. Sieverts
D. Becquerels

Check your answers here

Review Questions for Sunday April 18, 2010

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

Topic: Interactions

1. You are give the activity of a radioactive source; which is, 800 mCi (millicuries) and the half life of the source; that is, 6 hours. What will the activity of the source be in 12 hours?

A. 800 millicuries
B. 600 millicuries
C. 300 millicuries
D. 200 millicuries

Topic: Delivery

2. The half life of Iodine 125; I125 is approximately ________ ?

A. 120 days
B. 90 days
C. 60 days
D. 50 days

Topic: Physics

3. The frequency of a wave is measured in hertz (Hz). The frequency can be defined as: ?

A. The height of a given wave
B. The distance a given wave travels
C. The number of waves cycles per second
D. The speed of a photon

Check your answers here