ABSTRACT
TR image (b) Appears darker than its surroundings in a long TE, long
TR image (c) Appears brighter than its surroundings in a short TE, short
TR image (d) Appears darker than its surroundings in a short TE, short
TR image (e) Appears the same as its surroundings in a long TE, long
TR image 114. Cerebrospinal fluid (CSF) has longer T1 and T2 values than white
matter. Assuming that the proton density is the same for the two tissues, in a spin-echo image CSF appears:
(a) Brighter than gray matter in a long TE, long TR image (b) Darker than gray matter in a long TE, long TR image (c) Brighter than gray matter in a short TE, short TR image
(d) Brighter than gray matter in a long TE, short TR image (e) Darker than gray matter in a short TE, short TR image 115. § Arrange the T1-weighted images in Figure 11.8 in order of
increasing slice thickness, starting with the thinnest. Apart from slice thickness, the acquisitions are otherwise identical.
