Radiation Therapy😤

Front

regarding linear accelerators, which of the following is true? Maximum photon energy is equal to the energy of the electron striking the target, The bending magnet is rotated out of the beam in the electron mode, The beam current is higher in the electron mode then in the photon mode, The scattering foil is the primary component for the photon production

Back

Maximum photon energy is equal to the energy of the electron striking the target

Front

1 mSv is equal to ___ rem

Back

0.1

Front

If the total body is exposed to a dose of 4500 cGy in a single exposure, the most likely cause of death is?

Back

Cerebral edema

Front

By what factor does the intensity decrease when someone moves from 10 meters to 20 meters away from a radioactive source?

Back

4

Front

What is the allowable cumulative exposure for a radiation worker?

Back

One rem times the workers age in years

Front

Which of the following are interactions between an incident photon and an atomic nucleus: Photoelectric, Compton, Coherent, Pair production?

Back

Pair production

Front

A barrier that attenuates the useful portion of the beam to the required degree is known as

Back

Primary barrier

Front

A “star” shot on a linear accelerator is performed to test the rotational axis of the: Collimator, Couch, Gantry

Back

1,2,3

Front

Direct exposure to lasers that are used for patient alignment purposes can be a hazard for the: Pituitary, Retina, Commissure, Inner Ear

Back

Retina

Front

The average photon beam energy produced by a 6mv linear accelerator is approximately __ MV

Back

2