Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

CT 2 > Abdomen + Pelvis Procedures > Flashcards

Abdomen + Pelvis Procedures Flashcards

(82 cards)

Start Studying
1
Q

positioning

A

supine, arm above head

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

head first or feet first?

A

feet first but will be cephalocaudal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

purpose of positive oral contrast

A

to differentiate a fluid-filled loop of bowel from a mass or abnormal collection of fluid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are examples of positive oral contrast used

A
  • barium sulfate
  • water-soluble contrast
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

example of low attenuation oral contrast

A

water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are the advantages of using low attenuation contrast > positive contrast?

A
  • won’t obscure mucosal surfaces
  • won’t obscure abdominal vessels
  • better spatial reso on reconstructed images
  • doesn’t mask radiopaque stones
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

why is rectal contrast used?

A
  • staging colon ca
  • penetrating trauma, fistulas, anastomotic leaks
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

example of rectal contrast

A

CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

purposes of IV contrast

A
  • opacify vessels
  • increase CT density of vascular organs
  • improve image contrast between lesions and normal anatomy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

when are multi-phase scans usually performed?

A

imaging liver, pancreas, kidneys

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

algorithms
WW 450 WL 50

A

standard soft tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

algorithms
WW 150 WL 70

A

liver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

algorithms
WW 1500 WL -700

A

lungs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

algorithms
WW 2000 WL 600

A

bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

typically, DFOV is set to…

A

just include skin surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

indications for CECT Routine Abdomen + Pelvis (RAP)

A
  • abdominal mass
  • tumour staging
  • abscess
  • non-specific abdominal symptoms
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

type of contrast used for RAP

A

IV contrast or oral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what flow do you set the IV contrast for RAP

A

125 ml at 3.0 ml/sec, 50 ml NaCl flush

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

scan delay for RAP

A

65 secs - portal venous phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

volume of oral contrast used for RAP

A

675 ml barium sulfate (1.5 bottles) over 2 hours
(final 225 ml just prior to scanning)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

anatomy region for venous chest

A

above lung apices to below costophrenic angles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

anatomy region for venous abdomen only

A

above diaphragm to 1cm below iliac crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

anatomy region for venous abdomen and pelvis

A

above diaphragm to pubic symphysis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

mA for CECT CAP

A

avg 230

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
reconstruction slice thickness/increment for CAP
5mm/5mm
26
indications for CECT chest, abdomen, pelvis (CAP)
- infection - mass - trauma
27
what are the two scans done for CAP
1. venous chest 2. venous ab/pelvis
28
IV contrast rate for CAP
125 ml at 3.0ml/sec, 50 ml NaCl flush
29
scan delay for CAP - Chest
35 secs - late arterial/venous phase
30
scan delay for CAP - ab/pel
65 secs - portal venous phase
31
volume of oral contrast for CAP
900 ml 1 hour prior
32
what does appendicitis look like on a ct scan?
- dilated, non-opacified appendix - fat stranding - appendicolith
33
4 indications on a ct scan to rule out appendicitis
1. appendiceal lumen contains air or contrast 2. <6mm in diameter 3. appendiceal wall <2mm thick 4. no "stranding"
34
anatomy included for appendicitis scan
above diaphragm to below pubic symphysis
35
is contrast used for appendicitis scans?
yes - IV and oral
36
algorithm used for appendicitis scans
standard soft tissue
37
mA for appendicitis scan
avg 230, atcm (btw 100-575)
38
reconstruction of appendicitis scan slice thickness/interval
2.5mm/1.25mm
39
algorithm(s) used for CAP
soft tissue and lung
40
rate of IV contrast for appendicitis scans
125 ml at 3ml/sec, 50 ml NaCl flush
41
scan delay for appendicitis
65 secs
42
HU for normal liver
38-70 HU
43
indications for liver imaging
- fatty infiltration - cavernous hemangioma - hypervascular tumor - liver mets
44
how do you most accurately assess the liver?
NECT abdomen
45
how do you diagnose livers?
comparison of HU of liver to spleen
46
hepatic arterial phase
17-25 secs
47
late hepatic arterial phase
40-55 secs
48
portal venous phase
65-80 secs
49
hepatic venous phase
75-85 secs
50
early delayed hepatic phase
3-5 mins
51
vascular equilibrium phase
3-5 mins
52
late delayed hepatic phase
10-15 mins
53
parenchymal equilibrium phase
10-15 mins
54
how does cavernous hemangioma look on NECT
well-defined and hypodense of same density as other fluid-filled spaces
55
how does cavernous hemangioma look on CECT
progressive pooling of contrast at lesion's peripheral (centripetal filling)
56
enhancement for hypervascular tumors
late arterial phase (35-45 secs)
57
liver mets are (hyper/hypo)vascular
hypovascular
58
enhancement for liver mets
portal venous phase (60-80 secs)
59
anatomy for CECT arterial venous liver
just above diaphragm to iliac crests
60
algorithms used for CECT arterial venous liver
soft tissue and liver
61
reconstruction slice thickness/interval for CECT arterial venous liver
2.5mm/2.5mm
62
rate for IV contrast for CECT arterial venous liver
125 ml at 4 ml/sec, 50 ml NaCl flush
63
IV contrast scan delay for arterial (CECT arterial venous liver)
35 secs
64
IV contrast scan delay for venous (CECT arterial venous liver)
65 secs
65
oral contrast used for CECT arterial venous liver scans = 900 ml water, how much do we give 30 mins prior? 10 mins prior? just prior?
30 mins - 450 ml 10 mins - 225 ml just - 225 ml
66
what scans use water as oral contrast?
pancreas and arterial venous liver scans
67
indication for NECT pancreas
calculi in pancreatic or common bile duct
68
indication for CECT pancreas
pancreatitis, mass/tumors
69
what can be done if scans can't differentiate pancreas from duodenum
scan RLAT decubitus position
70
difference between arterial venous pancreas scan delay for arterial vs. arterial venous liver scan delay for arterial
pancreas - scan delay art = 40 secs liver - scan delay art = 35 secs
71
why CT for urinary tract calculi?
- high diagnostic accuracy - most types of stones are visible - can undergo 3d reconstruction - give info on degree of obstruction
72
slice thickness needed to identify stones for calculi scans
<2.5mm
73
indications for NECT ab/pel for calculi
- urinary tract calculi - renal colic - flank pain
74
KUB
NECT ab/pel for calculi
75
anatomy region for nect ab/pel calculi
2cm above kidneys to symphysis pubis
76
mA for nect ab/pel calculi
100 mA if pt <165lb otherwise, 0.7*pt weight (lbs)
77
indications for CT colongraphy
- positive FIT test - contraindication/failed/incomplete colonoscopy
78
contraindications for CT colonography
- bowel obstruction - toxic megacolon - acute abdomen or acute diverticulitis
79
what prep is required for ct colonography
clear liquid diet with laxatives, oral contrast and suppositories
80
double contrast is required for CT colonography. which two?
1. rectal contrast - co2 2. oral contrast - barium and water-soluble agent
81
anatomy region for ct colonography
just above diaphragm to lesser trochanters
82
mA for ct colonography
120

CT 2 (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions