Optic radiations are thinner and show signs of iron deposition in patients with long-standing remitting-relapsing multiple sclerosis: an enhanced T-2(*)-weighted angiography imaging study

摘要

ObjectiveThis study aimed to investigate iron deposition and thickness and signal changes in optic radiation (OR) by enhanced T-2(*)-weighted angiography imaging (ESWAN) in patients with relapsing-remitting multiple sclerosis (RRMS) with unilateral and bilateral lesions or no lesions.MethodsFifty-one RRMS patients (42 patients with a disease duration [DD] 2 years [group Mor], nine patients with a DD 2 years [group Les]) and 51 healthy controls (group Con) underwent conventional magnetic resonance imaging (MRI) and ESWAN at 3.0 T. The mean phase value (MPV) of the OR was measured on the phase image, and thickness and signal changes of the OR were observed on the magnitude image.ResultsThe average MPVs for the OR were 1,981.55 7.75 in group Mor, 1,998.45 2.01 in group Les, and 2,000.48 5.53 in group Con. In group Mor, 28 patients with bilateral OR lesions showed bilateral OR thinning with a heterogeneous signal, and 14 patients with unilateral OR lesions showed ipsilateral OR thinning with a heterogeneous signal. In the remaining nine patients without OR lesions and in group Con, the bilateral OR had a normal appearance. In the patients, a negative correlation was found between DD and OR thickness and a positive correlation was found between MPV and OR thickness.ConclusionsWe confirmed iron deposition in the OR in the RRMS patients, and the OR thickness was lower in the patients than in the controls.