Ct Registry Ch7 Pt2

Front 1

Indications for CT exams of the abdomen include:(3)

Back 1

the detection of masses, lesions, and vascular abnormalities in the liver, gall bladder, spleen, pancreas, kidneys, adrenals, and GI tract

Front 2

Oral contrast agents are not administered for _____________ or detection of _____________.

Back 2

abdominal CTA

ureteral calculi

Front 3

The opacification of the GI tract is necessary in order to reduce the risk of misdiagnosing fluid-filled bowel as a(n) ________________ or ______________.

Back 3

abscess

tumor

Front 4

Typical IV contrast agent doses for abdomen CT's are ____________ mL at a rate of _____________ per second.

Back 4

100 to 150mL

2 to 3 mL

Front 5

What is the delay time for a pancreatic mass?

Back 5

50 to 60

Front 6

What is the delay time for a biphasic scan of the pancreas?

Back 6

25 to 30 seconds(arterial)

60 to 70(portal venous)

Front 7

What is the delay time for a biphasic scan of the liver?

Back 7

20 to 25 seconds (arterial)

65 to 75 seconds (portal venous)

Front 8

What is the delay time for a spleen scan?

Back 8

75 to 85 seconds

Front 9

What is the delay time for a kidney/adrenal scan?

Back 9

75 to 85 seconds

Front 10

Vascular Abdomen CT:
IV protocol?

Back 10

100 to 150mL
rate of 4 to 5 mL/sec

Front 11

Vascular Abdomen CT:
Scan coverage?

Back 11

dome of the liver superiorly through the region of interest inferiorly.

Front 12

Vascular Abdomen CT:
What slice thicknesses are used in reconstructions?

Back 12

standard vascular: 5mm slices

MIP reconstructions: 0.5 to 2.0mm overlapping slices

Front 13

Vascular Abdomen CT:
mAs?

Back 13

200 to 300 mAs

Front 14

Vascular Abdomen CT:
filming and post-processing?

Back 14

soft tissues WW 300-350 WL 0-50

Liver windows WW120-160 WL 40-70

Sharp recon algorithm if high res is necessary

Front 15

Liver and Gall Bladder scans:
There is substantial enhancement of the liver compared to tumors during the ________________ phase.

Back 15

non-equilibrium

Front 16

Liver and Gall Bladder scans:
IV contrast protocol?

Back 16

100 to 150mL
2 to 3 mL/sec
delay of 65 to 75 seconds

Front 17

Liver and Gall Bladder scans:
A 25 second delay after IV contrast injection would yield the early part of _________________ or the ___________________.

Back 17

non-equilibrium phase

hepatic arterial phase

Front 18

Liver and Gall Bladder scans:
slice thickness in reconstructions?

Back 18

5mm contiguous slices

0.5 to 2mm overlapping slices through abnormal region

Front 19

Liver and Gall Bladder scans:
mAs?

Back 19

200 to 300 mAs

Front 20

Liver and Gall Bladder scans:
filming and post-processing?

Back 20

soft tissues:
WW 300 to 400
WL 0 to 50

Liver Windows:
WW 120 to 160
WL 40 to 70