CT review Anatomy
patients that are left dominant, the posterior descending artery branches from the:
left circumflex artery
at its distal end, the spinal cord tapers into the ____
what is the major contolling factor of exam quality for a coronary CTA?
patients heart rate
cerebrospinal fluid (CSF) is produced in the ___
the articulation between the distal tibia and fibula is called ____
what composes the cirlce of Willis?
posterior communicating arteries
why should you angle the gantry 15 degrees superior to the IOML during head cts?
to reduce radiation dose to the orbits
coronal imaging through the sinuses is typically performed with the plane of imaging:
perpendicular to the hard palate
what are the primary enhancement phases of the liver?
which of these does not commonly become calcifed?
c.) choroid plexus
what area of the brain does not enhance after IV contrast?
posterior horn of lateral ventricle
each iliac artery bifurcates into the internal and external iliac arteries at about the level of ___
the duodenum is suspended from the diaphragm by the ___
ligament of Treitz
what is the difference between ionic and non ionic iodinated contrast?
nonionic conteast has a lower osmolality than ionic
the kidneys are usually located where?
between T12 and L3
what is contre-coup?
brain injury on the opposite side of traumatic impact
____ the time it takes for blood to pass through an area of brain tissue.
mean transit time (MTT)
glioma is a ___ tumor
what secrets cerebra spinal fluid?
___ occurs between the skull and outer most meningeal covering of the brain called the dura-mater.
CTA of the brain should ha a delay of ___ seconds after the bolus
___ is forward slipping of upper vertebra over the lower.
how is spondylolisthesis best demonstrated?
areas of calcium identifed must demonstrate relative attenuation values grater than ___
what are fomites?
objects that have been contaminated by infectious organisms or microbes.
name the retro-peritoneal structures:
dual phase imaging with arterial and portal-venous phase is used to evaluate ___
the aorta bifurcates into left and right common iliac arteries at ___
what is the hallmark CT finding for focal nodular hyperplasia of the liver?
central scar that remains hypo dense after initial contrast administration
what is the cortical-medullary phase?
late arterial phase beginning 30-40 sec after the bolus
colonography images are best displayed in a ___ window settings.
wide (lung type)
what is the portion of the nephron responsible for filter unwanted substances from blood plasma?
what are the branches of the left coronary artery?
anterior descending and circumflex artery
what is the average HU for an unenhanced liver?
the liver receves 75% of its blood from the ____
the liver receves 25% of its blood from the ___
what are the stages of infect
azotemia is ___ nitrogenous materials in the blood (aka: uremia)
what is used to measure mineral content of bone in CT?
what is the primary clinical indication for non-contrast cardiac CT?
coronary artery calcium (CAC) quantification for the assessment of atherosclerosis.
what is the ideal heart rate for a CTA Chest?
a solitary pulmonary nodule can be assumed benign when its average density is ___
what part of the cardiac cycle corresponds the the T-wave of a ECG?
complete cardiac diastole
Stanford type _ dissecting aneurysms affect the descending aorta
Stanford type _ dissecting aneurysms affect the ascending aorta
CT review Anatomy