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Quantitative susceptibility mapping in patients with systemic lupus erythematosus: detection of abnormalities in normal-appearing basal ganglia.

Abstract：

OBJECTIVES:To evaluate whether quantitative susceptibility mapping (QSM) can be employed to detect abnormalities within normal-appearing basal ganglia on conventional MRI in patients with neuropsychiatric systemic lupus erythematosus (NPSLE). METHODS:For 33 SLE patients (13 NPSLE and 20 non-NPSLE patients) and 23 age/sex-matched controls, two radiologists independently measured the mean QSM and R2* values in various brain structures that appeared to be normal on conventional MR images. These values in each brain structure were compared among the two SLE groups and controls. RESULTS:Regarding the putamen, the NPSLE patients showed significantly higher QSM values than the non-NPSLE patients and controls (p < 0.05). For the lateral globus pallidus, both SLE groups showed significantly higher QSM values than the controls (p < 0.05). The R2* values were not significantly different between both SLE groups. The NPSLE patients showed a significant correlation between the mean QSM values in putamen and the disease duration (r = 0.63, p < 0.05). For the interobserver agreement, the QSM value was superior to the R2* value (0.690 vs. 0.446, Kendall W value). CONCLUSIONS:QSM can be used to identify increased susceptibility of the basal ganglia appearing to be normal on conventional MR images in NPSLE patients. KEY POINTS:• QSM values in the putamen are significantly higher in NPSLE than non-NPSLE. • NPSLE patients show correlation between QSM values in the putamen and disease duration. • QSM is more sensitive than R2* mapping for detecting subtle changes.

journal_name

Eur Radiol

journal_title

European radiology

authors

Ogasawara A,Kakeda S,Watanabe K,Ide S,Ueda I,Murakami Y,Moriya J,Futatsuya K,Sato T,Nakayamada S,Saito K,Tanaka Y,Liu T,Wang Y,Korogi Y

doi

10.1007/s00330-015-3929-3

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

1056-63

issue

4

eissn

0938-7994

issn

1432-1084

pii

10.1007/s00330-015-3929-3

journal_volume

26

pub_type

杂志文章

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