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the of the syringe holds the medication f
most cell damage from ionizing radiation occurs wh
all of the following affect patient dose except f

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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.

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