Computed Tomography for Technologists 2nd
Edition Exam Review Review questions and
answers for CT registry prep. This is from the
book "Computed Tomography for Technologists:
Exam Review" by Lois E Romans. Published by
Wolters Kluwer, Lippincott Williams and Wilkins
Latest Update 2024-2025 Actual Exam 200
Questions and 100% Verified Correct Answers
Guaranteed A+ Verified by Professor
"A precise set of steps to be performed in a specific order to solve a problem" describes:
A. an algorithm
B. beam attenuation
C. the mean of a random variable
D. the binomial probability formula - CORRECT ANSWER: A. an algorithm
A contrast material that is of a substantially higher density than that of the surrounding
structures can be referred to as a __ agent:
A. low attenuation
B. positive
C. negative
D. gastrointestinal - CORRECT ANSWER: B. positive
A device that is used to automatically load an unload optical discs is called a/n:
A. ethernet
B. tape drive
C. media vending machine
D. optical jukebox - CORRECT ANSWER: D. optical jukebox
,A focused appendiceal CT refers to a scan protocol that:
A. limits the scan area to the lower abdomen and upper pelvis
B. uses a rectal contrast agent
C. does not include any type of contrast media
D. scans the entire abdomen and pelvis with IV and oral contrast material - CORRECT
ANSWER: A. limits the scan area to the lower abdomen and upper pelvis
A graphical representation of the CT system's capability of passing information through
it to the observer is called:
A. interpolation
B. modulation transfer function (MTF)
C. receiver operator characteristics
D. contrast detail response - CORRECT ANSWER: B. modulation transfer function (mtf)
A limitation of scanner created MPR's is:
A. only one examination protocol per scanner can be programmed to automatically
create MPR's
B. they take more time to create than manually produced MPR's
C. in most cases, only straight sagittal and coronal planes can be automatically
generated
D. they are not consistently produced, so techs must remember to check to see whether
they were created - CORRECT ANSWER: C. in most cases, only straight sagittal and
coronal planes can be automatically generated
A magnification factor of 1.5 is used to enlarge the image data, resulting in:
A. a decrease in the pixel size
B. an increase in the pixel size
C. an inaccuracy in any subsequent distance measurement
,D. an image that is larger and may allow a more accurate cursor placement for
measurements - CORRECT ANSWER: D. an image that is larger and may allow a more
accurate cursor placement for measurements
A MIP is a good method to display all of the following EXCEPT?
A. pulmonary nodules
B. fracture extent
C. contrast filled coronary arteries
D. bronchial tree - CORRECT ANSWER: D. bronchial tree
A noncontrast CT of the abdomen is ordered on Mr. Smith. The primary indication is a
15year history of alcoholism. What can the technologist do to help the radiologist
determine whether the patient has a fatty liver?
A. Administer IV contrast and repeat series
B. Administer additional oral contrast and repeat series
C. continue scanning through pelvis, even though a pelvic exam was not ordered
D. Place a region of interest HU measurement within the liver and spleen before filming
- CORRECT ANSWER: D. place a region of interest HU measurement within the liver
and spleen before filming
A patient is being positioned for a routine scan of the brain. Why is he asked to tuck his
chin down toward his chest?
A. so that the scan time can be reduced
B. to allow immobilization sponges to be used
C. to reduce radiation exposure to the lens of the eye
D. to eliminate the need to tilt the gantry so that the axial scan mode can be used -
CORRECT ANSWER: C. to reduce radiation exposure to the lens of the eye
A patient who is scheduled for a CT study has an irregular heartbeat with a rate
approximately 85bpm. For which clinical indication is this the most problematic?
A. coronary artery disease
, B. assessment of ventricular function
C. possible thoracic aortic dissection
D. evaluation of congenital aortic arch anomaly - CORRECT ANSWER: A. coronary
artery disease
A scheme that compresses an image without any loss of information when the image is
decompressed is called:
A. lossy
B. fractional coding
C. scalar and vector quantization
D. lossless - CORRECT ANSWER: D. lossless
A volumetric HRCT study refers to a protocol that includes which of the following?
A. Thin sections, taken at an interval of 20mm or more between slices, during
inspiration, with the patient in supine position
B. A sampling technique that is intended to provide representative areas of the lung
C. Thins sections, in a helical mode, taken contiguously so as to cover the entire lung,
during inspiration with the patient in a supine position
D. three series of thin sections, in helical mode, taken contiguously so as to cover the
entire lung; series one is supine inspiratory; series two is supine expiratory; and series
three is prone inspiratory - CORRECT ANSWER: C. thin sections, helical mode, taken
contiguously so as to cover the entire lung, during inspiration with the patient in a supine
position
A water phantom is scanned and several ROI's are placed in the resulting image. The
ROI's placed at the perimeter of the image measure differently from the ROI's near the
center. This indicates a problem with:
A. linearity
B. cross field uniformity
C. noise
D. low contrast resolution - CORRECT ANSWER: B. cross field uniformity
Edition Exam Review Review questions and
answers for CT registry prep. This is from the
book "Computed Tomography for Technologists:
Exam Review" by Lois E Romans. Published by
Wolters Kluwer, Lippincott Williams and Wilkins
Latest Update 2024-2025 Actual Exam 200
Questions and 100% Verified Correct Answers
Guaranteed A+ Verified by Professor
"A precise set of steps to be performed in a specific order to solve a problem" describes:
A. an algorithm
B. beam attenuation
C. the mean of a random variable
D. the binomial probability formula - CORRECT ANSWER: A. an algorithm
A contrast material that is of a substantially higher density than that of the surrounding
structures can be referred to as a __ agent:
A. low attenuation
B. positive
C. negative
D. gastrointestinal - CORRECT ANSWER: B. positive
A device that is used to automatically load an unload optical discs is called a/n:
A. ethernet
B. tape drive
C. media vending machine
D. optical jukebox - CORRECT ANSWER: D. optical jukebox
,A focused appendiceal CT refers to a scan protocol that:
A. limits the scan area to the lower abdomen and upper pelvis
B. uses a rectal contrast agent
C. does not include any type of contrast media
D. scans the entire abdomen and pelvis with IV and oral contrast material - CORRECT
ANSWER: A. limits the scan area to the lower abdomen and upper pelvis
A graphical representation of the CT system's capability of passing information through
it to the observer is called:
A. interpolation
B. modulation transfer function (MTF)
C. receiver operator characteristics
D. contrast detail response - CORRECT ANSWER: B. modulation transfer function (mtf)
A limitation of scanner created MPR's is:
A. only one examination protocol per scanner can be programmed to automatically
create MPR's
B. they take more time to create than manually produced MPR's
C. in most cases, only straight sagittal and coronal planes can be automatically
generated
D. they are not consistently produced, so techs must remember to check to see whether
they were created - CORRECT ANSWER: C. in most cases, only straight sagittal and
coronal planes can be automatically generated
A magnification factor of 1.5 is used to enlarge the image data, resulting in:
A. a decrease in the pixel size
B. an increase in the pixel size
C. an inaccuracy in any subsequent distance measurement
,D. an image that is larger and may allow a more accurate cursor placement for
measurements - CORRECT ANSWER: D. an image that is larger and may allow a more
accurate cursor placement for measurements
A MIP is a good method to display all of the following EXCEPT?
A. pulmonary nodules
B. fracture extent
C. contrast filled coronary arteries
D. bronchial tree - CORRECT ANSWER: D. bronchial tree
A noncontrast CT of the abdomen is ordered on Mr. Smith. The primary indication is a
15year history of alcoholism. What can the technologist do to help the radiologist
determine whether the patient has a fatty liver?
A. Administer IV contrast and repeat series
B. Administer additional oral contrast and repeat series
C. continue scanning through pelvis, even though a pelvic exam was not ordered
D. Place a region of interest HU measurement within the liver and spleen before filming
- CORRECT ANSWER: D. place a region of interest HU measurement within the liver
and spleen before filming
A patient is being positioned for a routine scan of the brain. Why is he asked to tuck his
chin down toward his chest?
A. so that the scan time can be reduced
B. to allow immobilization sponges to be used
C. to reduce radiation exposure to the lens of the eye
D. to eliminate the need to tilt the gantry so that the axial scan mode can be used -
CORRECT ANSWER: C. to reduce radiation exposure to the lens of the eye
A patient who is scheduled for a CT study has an irregular heartbeat with a rate
approximately 85bpm. For which clinical indication is this the most problematic?
A. coronary artery disease
, B. assessment of ventricular function
C. possible thoracic aortic dissection
D. evaluation of congenital aortic arch anomaly - CORRECT ANSWER: A. coronary
artery disease
A scheme that compresses an image without any loss of information when the image is
decompressed is called:
A. lossy
B. fractional coding
C. scalar and vector quantization
D. lossless - CORRECT ANSWER: D. lossless
A volumetric HRCT study refers to a protocol that includes which of the following?
A. Thin sections, taken at an interval of 20mm or more between slices, during
inspiration, with the patient in supine position
B. A sampling technique that is intended to provide representative areas of the lung
C. Thins sections, in a helical mode, taken contiguously so as to cover the entire lung,
during inspiration with the patient in a supine position
D. three series of thin sections, in helical mode, taken contiguously so as to cover the
entire lung; series one is supine inspiratory; series two is supine expiratory; and series
three is prone inspiratory - CORRECT ANSWER: C. thin sections, helical mode, taken
contiguously so as to cover the entire lung, during inspiration with the patient in a supine
position
A water phantom is scanned and several ROI's are placed in the resulting image. The
ROI's placed at the perimeter of the image measure differently from the ROI's near the
center. This indicates a problem with:
A. linearity
B. cross field uniformity
C. noise
D. low contrast resolution - CORRECT ANSWER: B. cross field uniformity
