B2.003 Cardiac CT and MRI Flashcards Preview

MCM Test 1 > B2.003 Cardiac CT and MRI > Flashcards

Flashcards in B2.003 Cardiac CT and MRI Deck (22):
1

What does CT stand for?

computed tomography

2

How does a CT work?

using beams of x-rays to measure tissue densities

3

List tissues found in CT by density and color.

air< fat < water< muscle < bone< contrast

4

What is the standard CT image display?

Axial, standing at foot of patient bed looking through their body

5

Can other planes be reconstructed from CT axial data?

Yes

6

What does MRI stand for?

magnetic resonance imagine

7

How does an MRI work?

using strong magnetic field and radiofrequency pulses to measure chemical properties of tissues

8

What are standard MRI image displays?

axial, coronal, sagittal 2D slices

9

Can other planes be reconstructed from MRI axial data?

no, each must be acquired separately

10

Compare the time it takes to get a CT vs MRI?

CT - seconds
MRI - >30 min

11

When is cadiac CT most useful?

Coronary artery eval

12

What do you see on cardiac CT without contrast?

Calcium deposits to get the calcium score

13

What do you see on cardiac CT with contrast?

plaque, stenosis, congenital anomalies

14

What is EKG gating?

time x-rays for diastole to reduce cardiac motion artifact

15

What are features of the right ventricle on a cardiac CT?

most anterior, closest to sternum

16

What are features of the left ventricle on a cardiac CT?

thick walls

17

What are features of the right atrium on a cardiac CT?

receives IVC and SVC

18

What are features of the left atrium on a cardiac CT?

most posterior, closest to spine

19

L. Coronary artery features

arises from L. coronary sinus, divides into LAD and CX

20

LAD (L. anterior descending) features

through anterior interventricular groove, supplies anterior, apical, and septal regions of L. ventricle

21

CX (circumflex) features

through posterior atrioventricular groove, supplies free wall of L. ventricle

22

When is cardiac MRI useful?

evaluation of structure, function, and myocardial tissue characterization