ASRT Exam 5
________ is the local processing function of renumbering pixel values for an entire
image domain
A) The look-up table (LUT)
B) The histogram
C) Equalization
D) Windowing - answerD) Windowing
Minimizing patient exposure occurs when all of the following EXCEPT ________ are
done.
A) adding contrast medium
B) reducing the mAs
C) adding filtration
D) reducing the object-to-image distance (OID) - answerA) adding contrast medium
The ________ position BEST demonstrates the right sacroiliac joint.
A) LPO
B) RPO
C) LAO
D) right lateral - answerA) LPO
The fluoroscopic foot switch is a:
A) positive-pressure switch.
B) negative-pressure switch.
C) toggle switch.
D) variable resistor. - answerA) positive-pressure switch
The ________ is NOT a primary factor in the production of a radiograph.
A) milliamperage (mA)
B) time (seconds)
C) kilovoltage peak (kVp)
D) generator phase - answerD) generator phase
The tangential projection, or Gaynor-Hart method, of the wrist evaluates the:
A) carpal bridge.
B) carpal canal.
C) trapezium.
D) styloid tip of the radius. - answerB) carpal canal
An increase in patient exposure will result from:
A) decreasing mAs.
B) decreasing object-to-imaged distance OID.
,C) increasing grid ratio.
D) increasing focal spot size. - answerC) increased grid ratio
________ is the MOST important factor in controlling size distortion.
A) Focal spot size
B) Source-to-image distance (SID)
C) Object-to-image distance (OID)
D) Exposure time - answerC) Object-to-image distance (OID)
Which of the following is NOT a means of delivering oxygen to a patient?
A) nasal cannula
B) mechanical ventilator
C) chest tube
D) non-rebreathing mask - answerC) chest tube
The negative side of the x-ray tube is known as the:
A) anode.
B) focusing cup.
C) cathode.
D) rotor. - answerC) cathode
When acquiring nontrauma radiographs on the ankle it is important to place the foot in
a(n) ________ position.
A) inverted
B) everted
C) plantarflexed
D) dorsiflexed - answerD) dorsiflexed
Which of the following statements correctly describes how and why technical factors
MUST be changed from an anteroposterior (AP) lumbar spine to an oblique lumbar
spine image?
A) the abdomen becomes denser; technique must increase
B) the abdomen becomes less dense; technique must decrease
C) the abdomen becomes thicker; technique must increase
D) the abdomen becomes less thick; technique must decrease - answerC) the
abdomen becomes thicker; technique must increase
Defecography is used to measure and study the:
A) length of the transverse colon.
B) angles of the right and left colic flexures.
C) anorectal angle.
D) length of the sigmoid colon. - answerC) anorectal angle.
Which of the following attributes do personnel monitoring devices include? 1. They must
not be susceptible to environmental conditions. 2. Devices are designed to record only
small exposures. 3. The device must reflect human tissue absorption characteristics.
, A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3 - answerB) 1 and 3
The ________ detector consists of a thin-film transistor array.
A) flat-panel
B) photostimulable phosphor plate (PSP)
C) charge coupled device (CCD)
D) complementary metal-oxide semidonductor (CMOS) - answerA) flat-panel
Which of the following is FALSE about the laboratory value GFR?
A) GFR stands for glomerular filtration rate.
B) GFR is calculated from the results of a blood urea nitrogen (BUN) test.
C) GFR estimates how much blood passes through the glomeruli of the kidney.
D) GFR is a measure of kidney function and estimation of degree of kidney disease. -
answerB) GFR is calculated from the results of a blood urea nitrogen (BUN) test.
The spatial resolution of a detector is controlled by the:
A) sampling frequency.
B) matrix size.
C) milliampere-seconds (mAs).
D) analog-to-digital converter (ADC). - answerA) sampling frequency.
The feature that maintains image quality at the lowest dose in fluoroscopy is
abbreviated as:
A) AEC.
B) ABC.
C) AERC.
D) ATCM. - answerC) AERC
Anteroposterior (AP) oblique projections of the chest can be used when the patient is
too ill for upright or prone positioning. When the patient is in a 45° left posterior oblique
(LPO) position:
A) the right lung field is best displayed.
B) the left lung field is best displayed.
C) both lungs are well displayed.
D) neither lung is well displayed. - answerB) the left lung field is best displayed.
Until a photostimulable phosphor plate (PSP) is processed, electrons freed upon
irradiation are stored in the:
A) valence band.
B) photodetector.
C) conduction band.
D) conductive layer. - answerC) conduction band.
________ is the local processing function of renumbering pixel values for an entire
image domain
A) The look-up table (LUT)
B) The histogram
C) Equalization
D) Windowing - answerD) Windowing
Minimizing patient exposure occurs when all of the following EXCEPT ________ are
done.
A) adding contrast medium
B) reducing the mAs
C) adding filtration
D) reducing the object-to-image distance (OID) - answerA) adding contrast medium
The ________ position BEST demonstrates the right sacroiliac joint.
A) LPO
B) RPO
C) LAO
D) right lateral - answerA) LPO
The fluoroscopic foot switch is a:
A) positive-pressure switch.
B) negative-pressure switch.
C) toggle switch.
D) variable resistor. - answerA) positive-pressure switch
The ________ is NOT a primary factor in the production of a radiograph.
A) milliamperage (mA)
B) time (seconds)
C) kilovoltage peak (kVp)
D) generator phase - answerD) generator phase
The tangential projection, or Gaynor-Hart method, of the wrist evaluates the:
A) carpal bridge.
B) carpal canal.
C) trapezium.
D) styloid tip of the radius. - answerB) carpal canal
An increase in patient exposure will result from:
A) decreasing mAs.
B) decreasing object-to-imaged distance OID.
,C) increasing grid ratio.
D) increasing focal spot size. - answerC) increased grid ratio
________ is the MOST important factor in controlling size distortion.
A) Focal spot size
B) Source-to-image distance (SID)
C) Object-to-image distance (OID)
D) Exposure time - answerC) Object-to-image distance (OID)
Which of the following is NOT a means of delivering oxygen to a patient?
A) nasal cannula
B) mechanical ventilator
C) chest tube
D) non-rebreathing mask - answerC) chest tube
The negative side of the x-ray tube is known as the:
A) anode.
B) focusing cup.
C) cathode.
D) rotor. - answerC) cathode
When acquiring nontrauma radiographs on the ankle it is important to place the foot in
a(n) ________ position.
A) inverted
B) everted
C) plantarflexed
D) dorsiflexed - answerD) dorsiflexed
Which of the following statements correctly describes how and why technical factors
MUST be changed from an anteroposterior (AP) lumbar spine to an oblique lumbar
spine image?
A) the abdomen becomes denser; technique must increase
B) the abdomen becomes less dense; technique must decrease
C) the abdomen becomes thicker; technique must increase
D) the abdomen becomes less thick; technique must decrease - answerC) the
abdomen becomes thicker; technique must increase
Defecography is used to measure and study the:
A) length of the transverse colon.
B) angles of the right and left colic flexures.
C) anorectal angle.
D) length of the sigmoid colon. - answerC) anorectal angle.
Which of the following attributes do personnel monitoring devices include? 1. They must
not be susceptible to environmental conditions. 2. Devices are designed to record only
small exposures. 3. The device must reflect human tissue absorption characteristics.
, A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3 - answerB) 1 and 3
The ________ detector consists of a thin-film transistor array.
A) flat-panel
B) photostimulable phosphor plate (PSP)
C) charge coupled device (CCD)
D) complementary metal-oxide semidonductor (CMOS) - answerA) flat-panel
Which of the following is FALSE about the laboratory value GFR?
A) GFR stands for glomerular filtration rate.
B) GFR is calculated from the results of a blood urea nitrogen (BUN) test.
C) GFR estimates how much blood passes through the glomeruli of the kidney.
D) GFR is a measure of kidney function and estimation of degree of kidney disease. -
answerB) GFR is calculated from the results of a blood urea nitrogen (BUN) test.
The spatial resolution of a detector is controlled by the:
A) sampling frequency.
B) matrix size.
C) milliampere-seconds (mAs).
D) analog-to-digital converter (ADC). - answerA) sampling frequency.
The feature that maintains image quality at the lowest dose in fluoroscopy is
abbreviated as:
A) AEC.
B) ABC.
C) AERC.
D) ATCM. - answerC) AERC
Anteroposterior (AP) oblique projections of the chest can be used when the patient is
too ill for upright or prone positioning. When the patient is in a 45° left posterior oblique
(LPO) position:
A) the right lung field is best displayed.
B) the left lung field is best displayed.
C) both lungs are well displayed.
D) neither lung is well displayed. - answerB) the left lung field is best displayed.
Until a photostimulable phosphor plate (PSP) is processed, electrons freed upon
irradiation are stored in the:
A) valence band.
B) photodetector.
C) conduction band.
D) conductive layer. - answerC) conduction band.
