Assessment of the diagnostic accuracy of double inversion recovery sequence compared with FLAIR and T2W_TSE in detection of cerebral multiple sclerosis lesions
Background: Multiple sclerosis (MS) is a demyelinating disease of the central nervous system. MRI has an important role in early diagnosis of MS within diagnostic criteria. Aim: To determine the diagnostic value of the double inversion recovery (DIR) sequence in detection of brain MS lesions. Me...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Electronic Physician
2017-04-01
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| Series: | Electronic Physician |
| Subjects: | |
| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459288/ |
| Summary: | Background: Multiple sclerosis (MS) is a demyelinating disease of the central nervous system. MRI has an
important role in early diagnosis of MS within diagnostic criteria.
Aim: To determine the diagnostic value of the double inversion recovery (DIR) sequence in detection of brain
MS lesions.
Methods: In this cross-sectional study, 55 patients were admitted to the MRI department in Vali-E-Asr Hospital
in Qaemshahr, Iran, from May 2016 to February 2016. Imaging was performed on a 1.5T Philips MR system
using DIR, fluid attenuated inversion recovery (FLAIR), and T2-weighted turbo spin echo (T2W_TSE)
sequences with the same parameters, including field of view (FOV), matrix, slice thickness, voxel size, and
number of signal averaging (NSA). The DIR sequence has two different time inversions (TI1=3400, TI2=325ms):
suppressing cerebrospinal fluid (CSF) and white matter signal. Data analysis was performed using the SPSS
version 20, and p-value was gained from the patient-wise analysis by Wilcoxon analysis and paired samples t-test
for matched pairs.
Results: More lesions in number and size were depicted on the DIR sequence compared with FLAIR (p=0.000
with a relative ratio of 6) and T2W_TSE (p=0.000 with a relative ratio of 10). DIR demonstrated significantly
more intracortical lesions compared with FLAIR (p=0.000 with a relative ratio of 2.53) and T2W_TSE (p=0.000
and relative ratio of 8.87). There was significantly higher contrast ratio between the white matter lesions and the
normal appearing white matter (NAWM) in all anatomical regions especially in deep white matter (p=0.001).
Conclusion: An increasing total number of MS lesions can be detected by DIR sequence; thus, we recommend
adding DIR sequence in routine MR protocols for MS patients. |
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| ISSN: | 2008-5842 2008-5842 |