Chapter 41 Patient Radiation Dose Management Bushong: Radiologic Science for
Technologists
MULTIPLE CHOICE
1. Patient dose is usually estimated by conducting simulated x-ray examinations with
.
a. human subjects
b. laboratory animals
c. human phantoms and test objects
d. prisoners
ANS: C
Patient dose is usually estimated by conducting simulated x-ray examinations with human
phantoms and test objects.
2. What is the typical entrance skin exposure (ESE) for mammography?
a.2 mGya/view
b.4 mGya/view
c.6 mGya/view
d.8 mGya/view
ANS: D
The typical entrance skin exposure (ESE) for mammography is 8 mGya/view.
3. Glandular dose from mammography is approximately of the ESD.
a. 5%
b. 15%
c. 100%
d. 200%
ANS: B
Glandular dose from mammography is approximately 15% of the ESD.
4. The period of major organogenesis is during the of pregnancy. a. first 2 weeks
b. 2nd to 10th week
c. 2nd trimester
d. 3rd trimester
ANS: B
The period of major organogenesis is during the 2nd to 10th week of pregnancy.
5. Performing routine x-ray exams without indication is acceptable for .
a. preemployment physicals
, b. all hospital admissions
c. annual routine physicals
d. not acceptable
ANS: D
Performing routine x-ray exams without indication causes unnecessary radiation
exposure.
6. Which exam does not have one of the highest repeat rates?
a. Lumbar spine
b. KUB
c. Chest x-ray
d. Thoracic spine
ANS: C
The exams with the highest repeat rates are lumbar spine, thoracic spine, and KUB.
7. Patient dose can be reduced by using .
a. increased distance
b. decreased distance
c. higher kVp
d. repeating exposures
ANS: C
Patient dose can be reduced by using higher kVp.
8. Breast dose from a scoliosis exam can be reduced by using the .
a. increased mAs
b. multiple exposures for each view
c. AP projection
d. PA projection
ANS: D
Patient dose to the breasts during a scoliosis exam can be reduced by using a PA
projection.
9. During an imaging examination, which of the following combinations of technical
exposure factors and filtration reduce patient radiation dose? a. Lower kVp, higher mAs,
decreased filtration
b. Higher kVp, lower mAs, increased filtration
c. Higher kVp, higher mAs, decreased filtration
d. Lower kVp, lower mAs, increased filtration
ANS: B
Increasing the kVp is always associated with a reduction in mAs to obtain an
acceptable radiation exposure of the image receptor; this, in turn, results in reduced
Technologists
MULTIPLE CHOICE
1. Patient dose is usually estimated by conducting simulated x-ray examinations with
.
a. human subjects
b. laboratory animals
c. human phantoms and test objects
d. prisoners
ANS: C
Patient dose is usually estimated by conducting simulated x-ray examinations with human
phantoms and test objects.
2. What is the typical entrance skin exposure (ESE) for mammography?
a.2 mGya/view
b.4 mGya/view
c.6 mGya/view
d.8 mGya/view
ANS: D
The typical entrance skin exposure (ESE) for mammography is 8 mGya/view.
3. Glandular dose from mammography is approximately of the ESD.
a. 5%
b. 15%
c. 100%
d. 200%
ANS: B
Glandular dose from mammography is approximately 15% of the ESD.
4. The period of major organogenesis is during the of pregnancy. a. first 2 weeks
b. 2nd to 10th week
c. 2nd trimester
d. 3rd trimester
ANS: B
The period of major organogenesis is during the 2nd to 10th week of pregnancy.
5. Performing routine x-ray exams without indication is acceptable for .
a. preemployment physicals
, b. all hospital admissions
c. annual routine physicals
d. not acceptable
ANS: D
Performing routine x-ray exams without indication causes unnecessary radiation
exposure.
6. Which exam does not have one of the highest repeat rates?
a. Lumbar spine
b. KUB
c. Chest x-ray
d. Thoracic spine
ANS: C
The exams with the highest repeat rates are lumbar spine, thoracic spine, and KUB.
7. Patient dose can be reduced by using .
a. increased distance
b. decreased distance
c. higher kVp
d. repeating exposures
ANS: C
Patient dose can be reduced by using higher kVp.
8. Breast dose from a scoliosis exam can be reduced by using the .
a. increased mAs
b. multiple exposures for each view
c. AP projection
d. PA projection
ANS: D
Patient dose to the breasts during a scoliosis exam can be reduced by using a PA
projection.
9. During an imaging examination, which of the following combinations of technical
exposure factors and filtration reduce patient radiation dose? a. Lower kVp, higher mAs,
decreased filtration
b. Higher kVp, lower mAs, increased filtration
c. Higher kVp, higher mAs, decreased filtration
d. Lower kVp, lower mAs, increased filtration
ANS: B
Increasing the kVp is always associated with a reduction in mAs to obtain an
acceptable radiation exposure of the image receptor; this, in turn, results in reduced
