Gadolinium Enhancing Lesions in Multiple Sclerosis

Abstract

A Fig. 3.1 Axial T1-weighted with Gd (a), PD-(b), and T2-weighted (c) images of a patient with RRMS demonstrate several enhancing lesions with corresponding T2-weighted abnormalities (arrows). Note: Almost all enhancing lesions have a corresponding T2 abnormality, but in some cases Gd enhancement can precede T2 lesions by hours or days 3.2 Different Patterns of Enhancement A Fig. 3.2 Axial T1-weighted with Gd (a) and T2-weighted (b) images demonstrate a ring enhancing lesion (arrow) and the corresponding T2 hyperintensity (arrow-head). Note: Ring enhancing lesions seem to be more destructive, larger, and older than nodular lesions duced pathological specificity because even old and inactive lesions can show faint enhancement (Bitsch and Bruck 2002). In this chapter we demonstrate different patterns of enhancing lesions in various parts of the brain. Lesion evolution in detail is demonstrated in the next chapter.