Ct guided __________ __________ involves placement of a probe into a tumor under CT imaging correct answers radiofrequency ablation (RFA)
__________ (___) is used in PET-CT as the radioparmaceutical and mimics glucose correct answers Fludeoxyglucose F18
The amount of blood pumped out of a ven...
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Ct guided __________ __________ involves placement of a probe into a tumor under CT
imaging correct answers radiofrequency ablation (RFA)
__________ (___) is used in PET-CT as the radioparmaceutical and mimics glucose correct
answers Fludeoxyglucose F18
The amount of blood pumped out of a ventricle every hearbeat is termed correct answers
ejection fraction
The process of scanning a phantom device of known density to improve the accuracy of CT
attenuation measurement is... correct answers calibration
Name the hepatic phases of contrast correct answers arterial→ portal venous→ equilibrium
What's the range for Prothrombin (PT) time? correct answers 12-15 seconds
The 1st generation prototype scanner used __________ form of image reconstruction correct
answers iterative technique
The rate at which the photon fluence passes through a unit area over unit time is termed
__________ __________. correct answers photon flux
For MDCT, identified areas of calcium must demonstrate relative attenuation values greater
than: correct answers +130 HU
What technical adjustment can be made to improve the temporal resolution of an MDCT
system? correct answers decrease scan time
Parenteral contrast administration refers to which administration route? correct answers IV
administration
__________ __________ refers to the portion of the internal carotid artery as it enters the
bony skull and bifurcates into the anterior cerebral and middle cerebral arteries correct
answers carotid siphon
Oral administration of barium and iodinated contrast prior to CT colonography serves the
primary purpose of __________? correct answers polyptagging
The role of computed tomography during combined PET-CT includes what two things?
correct answers 1. anatomic location of tumor activity
2. attenuation correction of emitted photons
Whats the name of the articulation between the distal tibia and fibula? correct answers
syndesmosis
, In which kidney stage has the contrast been excreted into the renal calyces, showing the renal
pelvis, ureters and bladder? correct answers Excretory phase; (delayed imaging phase at 3
min after injection)
Detectors of a PET system absorb and measure what type of radiation? correct answers
annihilation photons
Name the rechnique that allows the user to select the range of pixel values used in a 3D CT
reformation correct answers thresholding
The __________ phase is about 20-25 seconds after injection. During this time the aorta and
renal arteries are demonstrated. correct answers arterial
Which cranial nerve would an acoustic neuroma be found? correct answers eight
(vestibolcochlear)
The propensity of a contrast agent to cause fluid to move from the extra-vascular space to the
intra-vascular space is called: correct answers osmolality
What is the DLP formula? correct answers DLP = MSAD * slice width (cm) * number of
slices in scan.
What kidney stage is timed between 70 and 90 seconds after injection? correct answers
nephrographic
__________ mathematical technique utilized for generation of perfusion maps? correct
answers deconvolution
__________ __________ describes the period of the cardiac cycle when the left and right
ventricles are contracting correct answers ventricular systole
__________ are objects that have been contaminated by an infectious organism or microbe
correct answers fomites (fomites don't bite)
Name the types of detectors used in CT? correct answers 1. Gas ionization
2. scintillation
What is the general rule when calculating the doseage of IV contrast for a pediatric patient?
correct answers 1 mL per pound
What's the normal INR range? correct answers 0.8 - 1.2
__________ are the calcifications within pelvic veins? correct answers phleboliths
The ability of a CT scanner to accurately image objects with similar densities is termed
__________ __________; __________ correct answers contrast resolution; sensitivity
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