Magnetic Resonance Imaging

Question 1

Compare how water and fat look on a T1-weighted scan

Answer 1

water is dark, fat is bright

Question 2

Compare how water and fat look on on T2-weighted snan.

Answer 2

Water is bright, fat is dark

• T2 = H20; remember this and just think T1 is opposite
• • look at cerebral spinal fluid and it will the white/bright

Question 3

In patients undergoing enhanced MRI, what is the most feared complication?

Answer 3

Nephrogenic systemic fibrosis

- skin fibrosis/hardening, plaques/pigmentation; joint contractures; fibrosis of internal organs

Question 4

What is the major risk factor for developing NSF?

Answer 4

GFR < 30

Question 5

A patient has an Interstim. Can they undergo MRI?

Answer 5

Head-only MRI is safe. Device may get warm during procedure.

Question 6

Is an artificial urethral sphincter MRI safe?

Answer 6

yes

Question 7

Which penile prostheses are MRI safe?

Answer 7

AMS 700 series (most common used), Ambicor, Dura II

Question 8

Which penile prostheses are MIR conditional

Answer 8

Titan series, Spectra, Genesis

Question 9

Are ureteral stents MRI safe?

Answer 9

Yes

- the Cook Black Silicone Filiform and Resonance (metal stent) are MRI conditional

Question 10

Are brachytherapy seeds MRI safe

Answer 10

They are MRI conditional