NMTCB CT BOARD EXAM QUESTIONS
AND ANSWERS (GRADED A)
CBF - ANSWER-cerebral blood flow
50-60 mL / 100 g / min
CBV - ANSWER-cerebral blood volume
4-5 mL / 100 g
platelet count - ANSWER-140k-440k per uL of blood
INR - ANSWER-International Normalized Ratio
0.8-1.2
PTT - ANSWER-partial thromboplastin time
25-35 seconds
BUN - ANSWER-7-25 mg / dL
creatinine - ANSWER-0.5-1.5 mg / dL
GFR (men) - ANSWER-70 +/- 14
GFR (women) - ANSWER-60 +/- 10
PT - ANSWER-prothrombin time
12-15 seconds
max IV contrast for a child shouldn't exceed - ANSWER-3 mL / kg of body weight
excretion half-life of IV contrast - ANSWER-1-2 hours
barium sulfate concentration - ANSWER-1-3%
water-soluble oral contrast for abdomen/pelvis should contain ________% iodine -
ANSWER-2-5
high-osmolar contrast = _________ mOsm / kg of water - ANSWER-1000-2400
risk factors for contrast-induced nephrotoxicity (CIN) - ANSWER-diabetes
myoloma
cardiac disease
, advanced age
hepatic contrast enhancement phases - ANSWER-arterial phase
portal/hepatic venous phase
equilibrium phase
delayed phase
arterial phase of hepatic contrast enhancement - ANSWER-25-35 seconds
hypervascular tumors
portal/hepatic venous phase of hepatic contrast enhancement - ANSWER-60-70
seconds
hypovascular lesions & masses
equilibrium phase of hepatic contrast enhancement - ANSWER-2-3 minutes
delayed phase of hepatic contrast enhancement - ANSWER-5-20 minutes
hemangioma
kidney contrast enhancement phases - ANSWER-corticomedullary phase
nephrographic phase
excretory phase
narrowing of the bony canals that contain the spinal cord, nerve roots, or both -
ANSWER-spinal stenosis
a defect in the pars inarticularis commonly caused by osteophyte formation - ANSWER-
spondylolysis
forward slipping of an upper vertebral body over the lower due to degenerative changes
of the facet joints - ANSWER-spondylolisthesis
filtration in CT tube varies from - ANSWER-6-9 mm Alumunum
ability of detector to capture transmitted x-ray quanta & produce the appropriate
response - ANSWER-inherent absorption efficiency
corticomedullary phase of kidney contrast enhancement - ANSWER-30-40 seconds
renal cortex & renal veins
nephrographic phase of kidney contrast enhancement - ANSWER-70-90 seconds
parenchymal lesions
excretory phase of kidney contrast enhancement - ANSWER-3-5 minutes
renal pelvis, ureters, bladder
AND ANSWERS (GRADED A)
CBF - ANSWER-cerebral blood flow
50-60 mL / 100 g / min
CBV - ANSWER-cerebral blood volume
4-5 mL / 100 g
platelet count - ANSWER-140k-440k per uL of blood
INR - ANSWER-International Normalized Ratio
0.8-1.2
PTT - ANSWER-partial thromboplastin time
25-35 seconds
BUN - ANSWER-7-25 mg / dL
creatinine - ANSWER-0.5-1.5 mg / dL
GFR (men) - ANSWER-70 +/- 14
GFR (women) - ANSWER-60 +/- 10
PT - ANSWER-prothrombin time
12-15 seconds
max IV contrast for a child shouldn't exceed - ANSWER-3 mL / kg of body weight
excretion half-life of IV contrast - ANSWER-1-2 hours
barium sulfate concentration - ANSWER-1-3%
water-soluble oral contrast for abdomen/pelvis should contain ________% iodine -
ANSWER-2-5
high-osmolar contrast = _________ mOsm / kg of water - ANSWER-1000-2400
risk factors for contrast-induced nephrotoxicity (CIN) - ANSWER-diabetes
myoloma
cardiac disease
, advanced age
hepatic contrast enhancement phases - ANSWER-arterial phase
portal/hepatic venous phase
equilibrium phase
delayed phase
arterial phase of hepatic contrast enhancement - ANSWER-25-35 seconds
hypervascular tumors
portal/hepatic venous phase of hepatic contrast enhancement - ANSWER-60-70
seconds
hypovascular lesions & masses
equilibrium phase of hepatic contrast enhancement - ANSWER-2-3 minutes
delayed phase of hepatic contrast enhancement - ANSWER-5-20 minutes
hemangioma
kidney contrast enhancement phases - ANSWER-corticomedullary phase
nephrographic phase
excretory phase
narrowing of the bony canals that contain the spinal cord, nerve roots, or both -
ANSWER-spinal stenosis
a defect in the pars inarticularis commonly caused by osteophyte formation - ANSWER-
spondylolysis
forward slipping of an upper vertebral body over the lower due to degenerative changes
of the facet joints - ANSWER-spondylolisthesis
filtration in CT tube varies from - ANSWER-6-9 mm Alumunum
ability of detector to capture transmitted x-ray quanta & produce the appropriate
response - ANSWER-inherent absorption efficiency
corticomedullary phase of kidney contrast enhancement - ANSWER-30-40 seconds
renal cortex & renal veins
nephrographic phase of kidney contrast enhancement - ANSWER-70-90 seconds
parenchymal lesions
excretory phase of kidney contrast enhancement - ANSWER-3-5 minutes
renal pelvis, ureters, bladder
