CT review Anatomy

  1. patients that are left dominant, the posterior descending artery branches from the:
    left circumflex artery
  2. at its distal end, the spinal cord tapers into the ____
    Conus medullaris
  3. what is the major contolling factor of exam quality for a coronary CTA?
    patients heart rate
  4. cerebrospinal fluid (CSF) is produced in the ___
    choroid plexuses
  5. the articulation between  the distal tibia and fibula is called ____
  6. what composes the cirlce of Willis?
    • anterior cerebral
    • anterior communicating
    • internal carotid
    • posterior cerebral
    • posterior communicating arteries
  7. why should you angle the gantry 15 degrees superior to the IOML during head cts?
    to reduce radiation dose to the orbits
  8. coronal imaging through the sinuses is typically performed with the plane of imaging:
    perpendicular to the hard palate
  9. what are the primary enhancement phases of the liver?
    • arterial
    • portal venous
    • equilibrium
  10. which of these does not commonly become calcifed?
    a.) thalamus
    b.)pineal gland
    c.) choroid plexus
  11. what area of the brain does not enhance after IV contrast?
    posterior horn of lateral ventricle
  12. each iliac artery bifurcates into the internal and external iliac arteries at about the level of ___
  13. the duodenum is suspended from the diaphragm by the ___
    ligament of Treitz
  14. what is the difference between ionic and non ionic iodinated contrast?
    nonionic conteast has a lower osmolality than ionic
  15. the kidneys are usually located where?
    between T12 and L3
  16. what is contre-coup?
    brain injury on the opposite side of traumatic impact
  17. ____ the time it takes for blood to pass through an area of brain tissue.
    mean transit time (MTT)
  18. glioma is a ___ tumor
  19. what secrets cerebra spinal fluid?
    choroid plexuses
  20. ___ occurs between the skull and outer most meningeal covering of the brain called the dura-mater.
    epidural hematoma
  21. CTA of the brain should ha a delay of ___ seconds after the bolus
    12-20 sec.
  22. ___ is forward slipping of upper vertebra over the lower.
  23. how is spondylolisthesis best demonstrated?
    sagital images
  24. areas of calcium identifed must demonstrate relative attenuation values grater than ___
    130 HU
  25. what are fomites?
    objects that have been contaminated by infectious organisms or microbes.
  26. name the retro-peritoneal structures:
    • duodenum
    • pancreas
    • adrenal glands
    • kidneys
    • ureters
    • bladder
  27. dual phase imaging with arterial and portal-venous phase is used to evaluate ___
    mesenteric vasculature
  28. the aorta bifurcates into left and right common iliac arteries at ___
  29. what is the hallmark CT finding for focal nodular hyperplasia of the liver?
    central scar that remains hypo dense after initial contrast administration
  30. what is the cortical-medullary phase?
    late arterial phase beginning 30-40 sec after the bolus
  31. colonography images are best displayed in a ___ window settings.
    wide (lung type)
  32. what is the portion of the nephron responsible for filter unwanted substances from blood plasma?
  33. what are the branches of the left coronary artery?
    anterior descending and circumflex artery 
  34. what is the average HU for an unenhanced liver?
  35. the liver receves 75% of its blood from the ____
    portal vien
  36. the liver receves 25% of its blood from the ___
    hepatic artery
  37. what are the stages of infecton?
    • incubation
    • prodromal
    • active
    • convalesence
  38. azotemia is ___ nitrogenous materials in the blood (aka: uremia)
  39. what is used to measure mineral content of bone in CT?
    quantitative CT
  40. what is the primary clinical indication for non-contrast cardiac CT?
    coronary artery calcium (CAC) quantification for the assessment of atherosclerosis.
  41. what is the ideal heart rate for a CTA Chest?
    65-70 bpm
  42. a solitary pulmonary nodule can be assumed benign when its average density is ___
    165-200 HU
  43. what part of the cardiac cycle corresponds the the T-wave of a ECG?
    complete cardiac diastole
  44. Stanford type _ dissecting aneurysms affect the descending aorta
  45. Stanford type _ dissecting aneurysms affect the ascending aorta
Card Set
CT review Anatomy