Ch 8 3D + 4D Imaging

Question 1

How is 3D imaging accomplished?

Answer 1

By acquiring many parallel 2D scans + then processing this 3D volume of echo info in appropriate ways for presentation on 2D displays

Question 2

How are multiple 2D frames obtained?

Answer 2

By electronic scanning with 2D element array transducers

Question 3

What is the 4th dimension?

Answer 3

Time

(there is a tendency to call 3D imaging 4D instead, which is inconsistent with previous terminology)

Question 4

What does STIC imaging stand for?

Answer 4

Spatio-temporal image correlation

Question 5

List 3 common ways of presenting 3D echo data?

Answer 5

-2D slices through the 3D volume
-Transparent views
-Surface renderings

Question 6

List the volume acquisition steps?

Answer 6

-Press 3D/4D on machine
-Select sensorless parallel (or whichever setting)
-Press the L button (split screen button) to start acquisition
-Press the R button (split screen button) to stop acquisition
-Adjust scan distance
-Press 3D on touch screen
-Now adjust acquisition by dragging the sides to view all planes

Question 7

What is the advantage of a 2D slice presentation?

Answer 7

To present image plane orientations that are impossible to obtain with conventional 2D scanning

(serial slice presentations can be presented as well)

Question 8

What is popular in OB imaging + echocardiography?

Answer 8

Surface renderings

Question 9

What do transparent views allow for?

Answer 9

“See through” imaging of the anatomy

Question 10

What is another term for 3D imaging?

Answer 10

Volume imaging

Question 11

Can a 3D image be acquired at rates sufficient for “live” or real time presentations?

Answer 11

Yes

Question 12

What is the difference b/w sensorless parallel + sensorless sweep with 3D imaging?

Answer 12

Parallel: sliding probe
Sweep: angling probe