ASRT CT Practice UPDATED ACTUAL
Questions and CORRECT Answers
the development of helical & continous acqu. scanning was made possible by - CORRECT
ANSWER - slip ring technology
NCRP whole-body effective dose limit for occupation exp. in radiation workers is: - CORRECT
ANSWER - 50 mSv
an intrathecal injection introduces contrast into the - CORRECT ANSWER - subarachnoid
space
nasal congestion is a ___ reaction to contrast media - CORRECT ANSWER - mild
the path of an individual photon from the xray tube to the detector is called a: - CORRECT
ANSWER - ray
during analog-to-digital conversion, the __ assigns binary units to form the digital signal -
CORRECT ANSWER - coder
in SDCT scanning, thin collimation results in ___ resolution - CORRECT ANSWER -
better
low osmolar contrast: - CORRECT ANSWER - -does not dissociate in solution
-has an osmolality 2-3 times higher than blood
-generally more expensive than ionic
-has relatively lower risk of reactions
methylprednisolone, or solu-medrol is commonly included in crash carts to - CORRECT
ANSWER - reduce inflammation
, isotropic scanning - CORRECT ANSWER - -enhances 3D & multiplanar recons
-reduces stair-step artifacts
-increases resolution
if contrast extravasation occurs, a warm compress can be applied to - CORRECT
ANSWER - dissipate the contrast
CT # of bone is - CORRECT ANSWER - +1000
in multiphase imaging studies, biliary calculi are best demoed in the - CORRECT
ANSWER - native (unenhanced) phase
the scan range for a c-spine exam should extend from the base of the skull through the level of -
CORRECT ANSWER - T2
CT tube voltages typically range from - CORRECT ANSWER - 80-140 kV
in MDCT, beam pitch is calculated as table feed per rotation divided by - CORRECT
ANSWER - total collimation
___ is a waste product from muscle function which is normally filtered from the bloodstream by
the kidneys & excreted form the body in urine - CORRECT ANSWER - creatinine
image noise can be reduced by ___ slice thickness - CORRECT ANSWER - increasing
in multiphase liver study, enhancement of the hepatic artery & portal vein is best demoed in the -
CORRECT ANSWER - late arterial phase
Questions and CORRECT Answers
the development of helical & continous acqu. scanning was made possible by - CORRECT
ANSWER - slip ring technology
NCRP whole-body effective dose limit for occupation exp. in radiation workers is: - CORRECT
ANSWER - 50 mSv
an intrathecal injection introduces contrast into the - CORRECT ANSWER - subarachnoid
space
nasal congestion is a ___ reaction to contrast media - CORRECT ANSWER - mild
the path of an individual photon from the xray tube to the detector is called a: - CORRECT
ANSWER - ray
during analog-to-digital conversion, the __ assigns binary units to form the digital signal -
CORRECT ANSWER - coder
in SDCT scanning, thin collimation results in ___ resolution - CORRECT ANSWER -
better
low osmolar contrast: - CORRECT ANSWER - -does not dissociate in solution
-has an osmolality 2-3 times higher than blood
-generally more expensive than ionic
-has relatively lower risk of reactions
methylprednisolone, or solu-medrol is commonly included in crash carts to - CORRECT
ANSWER - reduce inflammation
, isotropic scanning - CORRECT ANSWER - -enhances 3D & multiplanar recons
-reduces stair-step artifacts
-increases resolution
if contrast extravasation occurs, a warm compress can be applied to - CORRECT
ANSWER - dissipate the contrast
CT # of bone is - CORRECT ANSWER - +1000
in multiphase imaging studies, biliary calculi are best demoed in the - CORRECT
ANSWER - native (unenhanced) phase
the scan range for a c-spine exam should extend from the base of the skull through the level of -
CORRECT ANSWER - T2
CT tube voltages typically range from - CORRECT ANSWER - 80-140 kV
in MDCT, beam pitch is calculated as table feed per rotation divided by - CORRECT
ANSWER - total collimation
___ is a waste product from muscle function which is normally filtered from the bloodstream by
the kidneys & excreted form the body in urine - CORRECT ANSWER - creatinine
image noise can be reduced by ___ slice thickness - CORRECT ANSWER - increasing
in multiphase liver study, enhancement of the hepatic artery & portal vein is best demoed in the -
CORRECT ANSWER - late arterial phase
