Question

The list (1-5) are intrinsic and extrinsic factors that determine MR contrast. Which of these are intrinsic?

1. T1
2. T2
3. Proton density (PD)
4. TR
5. TE
A) 1 & 2
B) 2 & 3
C) 1, 2, & 3
D) 3, 4, & 5
E) 4 & 5

Answer 1

A) 1 & 2 are intrinsic factors that determine MR contrast. T1 and T2 refer to the intrinsic properties of the tissue being imaged that affect the signal intensity in an MRI. Proton density (PD), TR, and TE are extrinsic factors that can be manipulated by the imaging parameters to control the contrast in the image.