Bushong CH1. 3.

CH1

100

Terrestrial Radiation results from deposits of_____,_____,_____.

1. uranium

2. thorium

3. other radionuclides. 

200

The largest source of natural enviornmental radiation is______? 

Radon

300

_______is radioactive gas that is produced by the natural radioactive decay of uranium. 

Radon. 

400

The 3 general types of x-ray examinations are_______, ________, _______. 

1. radiography

2. Fluoroscopy

3. Computed tomography (CT)

500

_______ restricts the useful x-ray beam to that part of the body to be imaged and thereby spares adjacent tissue from unnecessary radiation exposure. 

Collimation. 

CH1

100

___________ is the kinetic Energy transferred from photons to electron during ionization and excitation. 

Air Kerma (Gy^a)

200

_________ is the biologic effects usually related to radiation absorbed dose in tissue. 

Absorbed Dose (Gy^t)