CT Imaging Procedures (Rad Tech Bootcamp) 100% Solved

CT Imaging Procedures (Rad Tech Bootcamp) 100% Solved The average flow rate recommended for venous phase imaging of the abdomen is: 1 ml per second 3 ml per second 5 ml per second 10 ml per second 3 ml per second Compared to a 1 mm reconstructed slice, a 5 mm reconstructed slice would usually result in what change? Assume all other variables remain constant. Decreased noise Decreased spatial resolution Decreased patient dose 1 only 2 only 1 and 2 only 1,2, and 3 1 and 2 only The first phase of IV contrast enhancement for most organs is the: Portal venous phase Arterial phase Delayed phase Capillary phase Arterial phase No Contrast is visible What type of contrast was administered to this patient prior to scanning? No contrast is visible Oral contrast Rectal contrast Intravenous contrast Which phase of IV contrast enhancement is ideal for initial imaging of intracranial hemorrhage? Venous phase Arterial phase Delayed phase Non-contrast Non-contrast This phase of contrast enhancement in the abdomen peaks at 50-60 seconds after initiating IV contrast injection. Portal venous phase Arterial phase Delayed phase Capillary phase Portal venous phase Consider a patient admitted to the emergency department for flank pain, hematuria, and suspected renal stone. CT imaging for the initial assessment of the collecting system should be performed during which phase of contrast enhancement? Non-contrast Excretory phase Arterial phase Portal venous phase Non-contrast During the monitoring phase of bolus tracking you see several images showing no contrast at all. Possible explanations include: The contrast injection was never initiated The contrast has infiltrated The saline and contrast syringes were loaded backwards All of the answer options listed are correct All of the answer options listed are correct What is the purpose of warming intravenous contrast prior to injection? decrease viscosity increase radiopacity decrease chemical toxicity 1 only 2 only 3 only 1,2, and 3 1 only Advantages of helical scanning over axial scanning include: Decreased scan time Decreased patient dose Increased spatial resolution 1 only 2 only 1 and 2 only 1,2 and 3 1 and 2 only Intravenously injected contrast can be viewed exiting organs during which phase of enhancement? Venous phase Arterial phase Delayed phase Equilibrium phase Venous phase Which of these venous access devices are sometimes labeled for CT power injection? Central lines (port) Dialysis catheters Jugular lines Central lines (port) One reason for decreasing the IV injection rate during CT scanning is High-speed scanner (16 rows or more) Poor IV catheter patency Angiographic scanning Geriatric imaging Poor IV catheter patency Which of the following is NOT a common reason to use contrast enhancement during CT scanning? Differentiate between normal tissues Differentiate between normal tissues and abnormalities Add visual contrast to the images Reduce patient radiation exposure Reduce patient radiation exposure Increasing the reconstruction slice thickness results in: Visualization of more anatomy with increased spatial resolution Visualization of more anatomy with decreased spatial resolution Visualization of less anatomy with increased spatial resolution Visualization of less anatomy with decreased spatial resolution Visualization of more anatomy with decreased spatial resolution Displayed CT images are processed to display a specific amount of anatomical data in each image. This is the: Reconstruction slice thickness Reconstruction slice interval Acquisition slice thickness Beam width Reconstruction slice thickness The abrupt starting and stopping of the patient table during axial scanning can result in: Increased patient dose Motion artifact on the images Decreased scan time Decreased spatial resolution from interpolation Motion artifact on the images A new computed tomography (CT) protocol requires scanning the liver at exactly 25 seconds after initiating intravenous (IV) contrast injection. This can be accomplished by which scan timing method? Scan delay time Test bolus Bolus tracking Scan delay time Which contrast injection method would be useful for precisely timed angiographic procedures? scan delay time test bolus bolus tracking 1 only 1 and 2 only 2 and 3 only 1,2, and 3 2 and 3 only Peripheral catheter The device in this image is a: Peripherally inserted central catheter (PICC) Central line (port) Dialysis catheter Peripheral catheter What is the primary reason for monitoring intraluminal pressure during IV contrast injection? To avoid contrast extravasation To evaluate contrast flow rate To minimize total contrast volume 1 only 1 and 2 only 2 and 3 only 1,2, and 3 1 only Which of the following is a potential reason to DECREASE the IV contrast volume used during a CT scan? Angiographic scanning Pediatric scanning Slow scanner speed Long scan length Pediatric scanning The acquisition slice thickness used during a scan is determined by the technologist. The acquisition thickness refers to: The thickness of activated detector rows The thickness of anatomical data averaged into each image The total width of the x-ray beam The space between adjacent slices The thickness of activated detector rows