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16 terms

rad review online missed questions

STUDY
PLAY
Which of the following can be used to demonstrate the intercondyloid fossa?

1. Patient PA, knee flexed 40°, central ray directed caudad 40° to the popliteal fossa
2. Patient AP, cassette under flexed knee, central ray directed cephalad to knee, perpendicular to tibia
3. Patient PA, patella parallel to IR, heel rotated 5° to 10° lateral, central ray perpendicular to knee joint
1. Patient PA, knee flexed 40°, central ray directed caudad 40° to the popliteal fossa
2. Patient AP, cassette under flexed knee, central ray directed cephalad to knee, perpendicular to tibia
The use of all of the following will function to reduce patient dose except
grid
An increase in kVp with appropriate compensation of mAs will result in

1. increased exposure latitude.
2. higher contrast.
3. increased density.
increased exposure latitude.
A thermoluminescent dosimetry system would use which of the following crystals
Lithium fluoride
To make the patient as comfortable as possible during a single-contrast barium enema (BE), the radiographer should

1. instruct the patient to relax the abdominal muscles to prevent intra-abdominal pressure.
2. instruct the patient to concentrate on breathing deeply to reduce colonic spasm.
3. prepare a warm barium suspension (98 to 105°F) to aid in retention.
1 and 2 only
The pyloric canal and duodenal bulb are best demonstrated during an upper GI series in which of the following positions?
RAO
Which of the following contribute(s) to inherent filtration?

1. X-ray tube glass envelope
2. X-ray tube port window
3. Aluminum between the tube housing and the collimator
1. X-ray tube glass envelope
2. X-ray tube port window
Radiation safety requirements for fluoroscopic equipment include the following:

1. SSD at least 38 cm on stationary (fixed) equipment.
2. SSD at least 30 cm on mobile equipment.
3. high level/boost mode must have continuous audible signal.
1. SSD at least 38 cm on stationary (fixed) equipment.
2. SSD at least 30 cm on mobile equipment.
3. high level/boost mode must have continuous audible signal.
Which interaction between x-ray photons and matter results in total absorption of the incident photon?
Photoelectric effect
Any images obtained using DXA bone densitometry

1. are used to evaluate accuracy of the ROI.
2. are used as evaluation for various bone/joint disorders.
3. reflect the similar attenuation properties of soft tissue and bone.
are used to evaluate accuracy of the ROI.
Which of the following is (are) associated with a Colles' fracture?

1. Transverse fracture of the radial head
2. Chip fracture of the ulnar styloid
3. Posterior or backward displacement
Transverse fracture of the radial head
2. Chip fracture of the ulnar styloid
The input phosphor of the image intensifier tube functions to convert

A. kinetic energy to light.B. x-rays to light.C. electrons to light.D. fluorescent light to electrons
x-rays to light
Conditions contributing to poor radiographic film archival quality include

1. fixer retention.
2. insufficient developer replenishment.
3. poor storage conditions
1. fixer retention.
2. insufficient developer replenishment.
3. poor storage conditions
Which of the following will influence recorded detail?

1. Screen speed
2. Screen-film contact
3. Focal spot
1. Screen speed
2. Screen-film contact
3. Focal spot
change from 100 speed screens to 200 speed screens would require what change in mAs
mAs should be halved
An increase in the kilovoltage applied to the x-ray tube increases the

1. x-ray wavelength.
2. exposure rate.
3. patient absorption
exposure rate