ASRT - Seal Exam 2 Questions with 100%
Verified Correct Answers
The ________ of the syringe holds the medication for injection.
barrel
plunger
bevel
cap - Correct Answer barrel
The barrel is covered with the printed calibration markings and holds the medication.
MOST cell damage from ionizing radiation occurs when x-rays interact with:
free radicals.
DNA.
water molecules.
electrons. - Correct Answer water molecules
Most damage occurs when x-rays interact with water molecules. This is because the human body is
approximately 80% water. Irradiation of water atoms results in free radicals.
All of the following affect patient dose, EXCEPT for:
inherent filtration.
added filtration.
source-to-image distance (SID).
focal spot size. - Correct Answer focal spot size.
- no influence on patient dose
If the exposure rate for a fluoroscopic procedure is 2.5 mGy/hr, the total exposure for a procedure
with 3 minutes of fluoroscopy time would be ______ mGy.
,0.75
0.25
0.125
0.075 - Correct Answer Total exposure is the product of exposure rate and time. 3 minutes is equal to
0.05 hours (3 min/60 min per hr). Exposure = 2.5 mGy/hr x 0.05 hr = 0.125 mGy.
A malignant primary tumor of bone is a(n):
chondrosarcoma
enchondroma
metastasis
osteosarcoma - Correct Answer osteosarcoma
A malignant, primary tumor of bone is an osteosarcoma. Osteo- means bone and -sarcoma means
malignant tumor.
What change produced the differences in the 2 emission spectra below?
( this is the graph with the peak at the right hand side, two lines)
target material
filtration
milliampere-seconds (mAs)
kilovoltage peak (kVp) - Correct Answer kilovoltage peak (kVp)
All of the following affect tube output EXCEPT FOR:
focal spot size.
target material.
filtration.
kilovoltage peak (kVp). - Correct Answer focal spot size.
, Focal spot size affects the spatial resolution of an image, not tube output.
Target material and kVp affect x-ray production efficiency which, in turn, affects tube output.
Filtration affects tube output because it attenuates lower energy x-rays.
Radiodermatitis is a local tissue effect of the ________ system.
integumentary
gastrointestinal
hematopoietic
central nervous - Correct Answer integumentary
Types of gonadal shielding include all of the following EXCEPT:
flat contact.
shaped (contour) contact.
shadow.
Ferlic filter. - Correct Answer Ferlic filter.
The Ferlic filter is a type of compensating filter.
If a patient's exposure at a distance of 2 meters is 24 mGy, the exposure at 8 meters would be
________ mGy.
1.5
6
12
18 - Correct Answer According to the inverse square law (I1/I2 = d22/d12), if the distance is doubled,
the exposure decreases to one-fourth of the original value. In this case, the distance was doubled
twice; therefore, the exposure was reduced to one-sixteenth of the original value (2 meters to 4
meters = 6 mGy; then 4 meters to 8 meters = 1.5 mGy).
An acceptable image is produced using 72 kVp, 5 mAs, no grid, and 40-inch SID. If the image is
repeated using a 12:1 grid, ________ mAs would be needed to maintain receptor exposure.
Verified Correct Answers
The ________ of the syringe holds the medication for injection.
barrel
plunger
bevel
cap - Correct Answer barrel
The barrel is covered with the printed calibration markings and holds the medication.
MOST cell damage from ionizing radiation occurs when x-rays interact with:
free radicals.
DNA.
water molecules.
electrons. - Correct Answer water molecules
Most damage occurs when x-rays interact with water molecules. This is because the human body is
approximately 80% water. Irradiation of water atoms results in free radicals.
All of the following affect patient dose, EXCEPT for:
inherent filtration.
added filtration.
source-to-image distance (SID).
focal spot size. - Correct Answer focal spot size.
- no influence on patient dose
If the exposure rate for a fluoroscopic procedure is 2.5 mGy/hr, the total exposure for a procedure
with 3 minutes of fluoroscopy time would be ______ mGy.
,0.75
0.25
0.125
0.075 - Correct Answer Total exposure is the product of exposure rate and time. 3 minutes is equal to
0.05 hours (3 min/60 min per hr). Exposure = 2.5 mGy/hr x 0.05 hr = 0.125 mGy.
A malignant primary tumor of bone is a(n):
chondrosarcoma
enchondroma
metastasis
osteosarcoma - Correct Answer osteosarcoma
A malignant, primary tumor of bone is an osteosarcoma. Osteo- means bone and -sarcoma means
malignant tumor.
What change produced the differences in the 2 emission spectra below?
( this is the graph with the peak at the right hand side, two lines)
target material
filtration
milliampere-seconds (mAs)
kilovoltage peak (kVp) - Correct Answer kilovoltage peak (kVp)
All of the following affect tube output EXCEPT FOR:
focal spot size.
target material.
filtration.
kilovoltage peak (kVp). - Correct Answer focal spot size.
, Focal spot size affects the spatial resolution of an image, not tube output.
Target material and kVp affect x-ray production efficiency which, in turn, affects tube output.
Filtration affects tube output because it attenuates lower energy x-rays.
Radiodermatitis is a local tissue effect of the ________ system.
integumentary
gastrointestinal
hematopoietic
central nervous - Correct Answer integumentary
Types of gonadal shielding include all of the following EXCEPT:
flat contact.
shaped (contour) contact.
shadow.
Ferlic filter. - Correct Answer Ferlic filter.
The Ferlic filter is a type of compensating filter.
If a patient's exposure at a distance of 2 meters is 24 mGy, the exposure at 8 meters would be
________ mGy.
1.5
6
12
18 - Correct Answer According to the inverse square law (I1/I2 = d22/d12), if the distance is doubled,
the exposure decreases to one-fourth of the original value. In this case, the distance was doubled
twice; therefore, the exposure was reduced to one-sixteenth of the original value (2 meters to 4
meters = 6 mGy; then 4 meters to 8 meters = 1.5 mGy).
An acceptable image is produced using 72 kVp, 5 mAs, no grid, and 40-inch SID. If the image is
repeated using a 12:1 grid, ________ mAs would be needed to maintain receptor exposure.
