MCQ’s for Medical Physics Lectures
MCQ’s for Medical Physics Lectures
Medical Physics Unit, Radiology Department KAU
1. The monitoring and measuring of a person’s exposure to radiation is called:
a. Densitometry
b. Dosimetry
c. Sensitometry
d. ALARA
2. Which type of personal radiation monitor may be used for the longest period of time before being read?
a. Film badge
b. Pocket ion chamber
c. Scintillation crystal
d. TLD
3. something on CT dose is equivalent to chest x-rays???number, just to increase awarness!!
4. What is the whole body dose equivalent limit for the occupational exposure according to the National Council on Radiation Protection (NCRP)?
a. 5000 mSv (500 rem)
b. 500 mSv (50 rem)
c. 50 mSv (5 rem)
d. 5 mSv (0.5 rem)
Should we only use mSv???? I think we can confuse them if we put two units
5. What is the maximum monthly radiation exposure dose allowed for the pregnant radiation worker?
a. 0.5 mSv
b. 1mSv
c. 5 mSv
d. 50 mSv
6. The primary purpose for using personal monitoring is to:
a. protect the radiographer
b. calculate the total amount of radiation a radiographer delivers
c. monitor a radiographer’s repeat rate
d. indicate a radiographer’s occupational exposure
7. Which of the following devices are used to protect the patient from unnecessary radiation exposure?
a. Collimators, filters, grids
b. Immobilisation devices, filters, high kVp techniques
c. Shields, direct exposure systems, increased SID
d. Short source to skin distance, fast screens, cones
8. Which type pf cell is most sensitive to irradiation?
a. Red blood cells
b. White blood cells
c. Epithelial cells
d. Muscle cells
9. Which type of ionizing radiation will have the LEAST biological effect?
a. alpha particles
b. fast neutrons
c. 25 MeV x-rays
d. Diagnostic x-rays
10. Direct effects of irradiation are those that
a. cause immediate cell death
b. affect structures distant from irradiated structures
c. affect the site of irradiation
d. cause the least biological effect
11. The radiation protection philosophy that promotes the use of the least amount of radiation possible for medical imaging is termed:
a. NCRP
b. NRC
c. ICRP
d. ALARA
12. A radiation monitor device should be worn by a
a. radiographer undergoing a radiographic procedure
b. nurse working in an area where mobile radiography is performed
c. family member assisting a patient during a radiographic procedure
d. radiographer performing fluoroscopic procedures
(great explanation see answer for Q 31)
13. The cardinal rules of radiation protection recommended the use of
a. maximum exposure time, distance and shielding
b. automatic exposure control, fast imaging systems, and maximum shielding
c. minimum exposure time, maximum distance, and appropriate shielding
d. maximum beam restriction, minimum exposure time, and maximum distance
(make sure that answer for Q 38 is part of your lecture to give them this question as an exam question)
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