Chapter 39 Radiography, Fluoroscopy Patient Radiation Dose-Bushong Test Bank

Chapter 39 Radiography/Fluoroscopy Patient Radiation Dose Bushong: Radiologic
Science for Technologists




MULTIPLE CHOICE


1. Patient dose from diagnostic x-rays is most often reported in .
a. bone marrow dose
b. gonadal dose
c. entrance skin dose
d. reproductive organ dose




ANS: C
Patient dose from diagnostic x-rays is most often reported in entrance skin dose.


2. Patient skin exposure can be measured indirectly by using a .
a. thermoluminescent dosimeter
b. nomogram
c. G-M counter
d. stop watch




ANS: B
Exposure can be measured indirectly by using a nomogram.


3. If the radiographic technique for a KUB calls for 40 mAs, what is the ESD when the
output intensity is 0.075 mGy/mAs? a. 0.40 mGy
b. 0.475 mGy

, c. 3 mGy
d. 30 mGy




ANS: C
Entrance skin dose = output intensity  mAs; therefore, the ESE is 0.075 mGy/mAs
 40 mAs, which equals 3 mGy.
4. Acute skin effects from radiation exposure have been reported following _ exams.
a. lumbar spine
b. GI fluoro
c. mammography
d. angio/interventional




ANS: D
Acute skin effects from radiation exposure have been reported following
angio/interventional exams.


5. For the average fluoroscopy exam the ESE is
a. 40 mGy/min.
b. 80 mGy/min.
c. 400 mGy/hr.
d. 250 mGy/hr.




ANS: A
The average ESE during fluoroscopy is 40 mGy/min.

, 6. An estimation of patient dose is reported as .
a. entrance skin exposure
b. bone marrow dose
c. gonadal dose
d. ESE, bone marrow dose and gonadal dose




ANS: D
An estimation of patient dose is reported as entrance skin exposure, bone marrow
dose, or gonadal dose.
7. Bone marrow dose is measured .
a. directly from bone marrow
b. as an estimate from ESE
c. as an estimate from gonadal dose
d. directly from the beam




ANS: B
Bone marrow dose is measured as an estimate from ESE.


8. The most important variable in determining x-ray dose are the .
a. receptor speed
b. patient thickness
c. technique used
d. the technologist performing the exam




ANS: A