Question

Steady state free precession (SSFP, FISP) is a specialized steady-state sequence that detects signal only from ____ and not from ____. TE is ___ than TR. The image is more ___ than ____.

a. Stimulated echo not FID; Longer (almost double); More T2 than T2*
b. Free induction decay not Stimulated echo; Shorter; More T2* than T2
c. Gradient echo not Spin echo; Equal; More T1 than T2
d. Inversion recovery not Fat saturation; Longer (almost double); More T1 than T2*

Answer 1

SSFP MRI sequence detects signal from Free induction decay (FID) and not Stimulated echo; with a shorter TE than TR, and a resulting image that has more T2* contrast than T2.

Step-by-step explanation:

Steady state free precession (SSFP, FISP) is a specialized steady-state sequence in MRI that detects signal only from Free induction decay (FID) and not from Stimulated echo. The Echo Time (TE) is shorter than the Repetition Time (TR). The image produced is more representative of T2* (T2 star) contrast than T2 contrast. These properties are exploited in MRI to enhance contrast in images and to obtain more information about the tissue. Relaxation times, which include T1 and T2, refer to how long it takes for protons to return to their equilibrium state after being disturbed by an external magnetic field, and these times can provide diagnostic information about tissue type and status, such as the presence of inflammation.