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. 1 / 3
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. 2 / 3
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.
- / 3