Parameters and Options

Question 1

True or false: Number of excitations increases scan time and increases SNR

Answer 1

True

Question 2

To perform a proper axial T2 weighted image of the brain, you would utilize a _______ TR and ______ TE.

Answer 2

Long, long

Question 3

The difference between physiological gating and triggering is that:

Answer 3

Gating captures images between cardiac pulsation while triggering imaging through cardiac cycle and subtract subpar information

Question 4

The addition of an _______ is the difference between 2D and 3D imaging.

Answer 4

Extra phase direction

Question 5

Increasing your matrix on an MRI knee from 320x88 to 512x384 will _______ spatial resolution while _______ SNR.

Answer 5

Increase; decrease

Question 6

In comparison, an MR image of 288x160 would be called a _______ Matrix, while an MR image of 512x416 would be a ______ matrix.

Answer 6

Course; fine

Question 7

An ______ in FOV will ______ SNR.

Answer 7

Increase; increase

Question 8

As you increase echo train length, you ______ SNR because ________.

Answer 8

Decree; echoes are being sampled further from the initial 90° RF pulse

Question 9

Decreasing your band width from 52 kHz to 35 kHz will sample a ______ range of precessional frequencies which results in a ______ in SNR.

Answer 9

Narrow; increase

Question 10

Ideally used for mass and contrast imaging, T1 weighted images uses a TR range of _______-______ ms and a TE range of _______-______ ms.

Answer 10

400 to 700; 10 to 14