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329 - MRI imaging production & procedures > unit 6 > Flashcards

unit 6 Flashcards

1
Q

first branch from the abdominal aorta

A

celiac trunk

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2
Q

second branch off the abdominal aorta

A

superior mesenteric artery

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3
Q

we may scan pediatrics and pregnant patient abdomens for

A

appendicitis

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4
Q

equipment used in abdominal MRI imaging

A

body coil
bellows
headphones/earplugs

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5
Q

bellows attach around the patients to

A

monitor breathing

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6
Q

horizontal alignment light should pass through the level of the

A

third lumbar vertebrae, or lower costal (rib cage) margin

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7
Q

abdominal coronals are prescribed

A

from the posterior abdominal muscles to the anterior abdominal wall

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8
Q

the abdominal coronal FOV at minimum should include

A

from the diaphragm down through the kidneys

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9
Q

abdominal axials should cover the area of interest from

A

superior to inferior

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10
Q

possible artifacts for abdominal imaging

A
  • breathing motion
  • peristalsis
  • inconsistent breathing
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11
Q

to help eliminate breathing artifacts use

A
  • parallel imaging
  • respiratory techniques
  • a “navigator” can be used
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12
Q

what divides the liver into right & left lobes

A

falciform ligament

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13
Q

T/F: the patient is the largest source of field inhomogeneities and susceptibility artifacts in a scan

A

true

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14
Q

what term is used for something that is applied to refocus the de-phasing after the excitation pulse?

A

gradient

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15
Q

what are the only 2 kinds of pulse sequences in MRI

A

GRE & SE

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16
Q

which sequence do you typically run for brains to look for hemorrhage?

A

GRE

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17
Q

T/F: all pulse sequences start off with an excitation RF pulse and a slide gradient applied at one right after another

A

false

18
Q

what is the order of the gradients of how things occur for each slice?
(first to last)

A
  • slice
  • phase
  • frequency
19
Q

T/F: a flip angle that produces the maximum signal and T1 contrast is called the Ernst angle

A

true

20
Q

what is the “back bone” of MR scanning

A

SE

21
Q

T/F: both the SE & GRE are very similar, it is the lack of a 180 degree RF pulse in GRE that is the major difference

A

true

22
Q

what is given to the patient to drink before an MR enterography

A

barium contrast

23
Q

T/F: the MRCP is used to visualize the biliary duct & the pancreatic duct

A

true

24
Q

for abdomen scanning, the superior portion of the axial slices should be

A

superior to the liver/diaphragm dome

25
Q

coronal slices for scanning the abdomen should be set up

A

posterior to anterior

26
Q

axial slices for scanning the abdomen should be set up

A

superior to inferior

27
Q

T/F: In and Out phase imaging is usually done in axial T1 sequences

A

true

28
Q

what can commonly lead to artifacts during an abdominal imaging exam

A

peristalsis & breathing

29
Q

a patient undergoing an MRCP should fast for

A

at least 4 hours

30
Q

where should you center for the abdomen MRI

A

at the L3 vertebral level

31
Q

what sequence is used to differentiate adrenal adenomas (that typically contain fat) from carcinomas and metastasis (that do not)

A

In and Out of phase imaging

32
Q

the accumulation of excess fluid in the abdominal cavity

A

ascites

33
Q

what does MRCP stand for

A

Magnetic resonance cholangiopancreatography

34
Q

slices for MRCP

A

thin slices posterior to anterior through the biliary ducts

35
Q

used to visualize the biliary ducts & pancreatic duct , also gallstones

A

MRCP

36
Q

MRCPs utilize _____ TEs to see the fluid

A

long

37
Q

patients fast ____ prior to an MRCP

A

4 hours

38
Q

T/F: the kidneys are at slightly different levels in the torso

A

true

39
Q

to visualize abdominal aortic dissection the best ,

A

SSF & contrast enhanced MRA’s are recommended

40
Q

what pathology is visualized best in MR enterography

A

crohn’s disease & inflammatory bowel disease

41
Q

contrast is given ____ before an enterography exam

A

1 hour

42
Q

what is given during enterography to slow down the patients peristalsis

A

glucagon

329 - MRI imaging production & procedures (8 decks)

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