Added Value of Morphological and Functional Magnetic Resonance Neurography in Assessment of Carpal Tunnel Syndrome in Correlation with Nerve Conduction Studies

Mohamed Abdullah, Mahmoud Abdou; Kamal, Tamer Ahmed; Shalan, Ahmed El-Sayed; Shaaban Abdel Naby, Soha

doi:10.21608/bmfj.2023.219205.1844

	Added Value of Morphological and Functional Magnetic Resonance Neurography in Assessment of Carpal Tunnel Syndrome in Correlation with Nerve Conduction Studies
Benha Medical Journal
Article 22, Volume 40, Issue 2, September and October 2023, Page 553-565 PDF (758.54 K)
Document Type: Original Article
DOI: 10.21608/bmfj.2023.219205.1844
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Authors
Mahmoud Abdou Mohamed Abdullah ¹; Tamer Ahmed Kamal¹; Ahmed El-Sayed Shalan¹; Soha Shaaban Abdel Naby²
¹Department of diagnostic radiology, faculty of medicine, Benha university.
²Department of rheumatology & rehabilitation, general organization for teaching hospitals and institutes.
Abstract
Objectives: To study the value of morphological and functional MRI criteria in diagnosis of carpal tunnel syndrome (CTS) and determine cut-off values between normal individuals and CTS patients. Patients and methods: Thirty wrists examined in patients with CTS diagnosis confirmed by nerve conduction studies (NCS) and 10 wrists in healthy subjects (mean age 46.5 and 39.9 years). Cross-sectional area (CSA), fractional anisotropy (FA) and apparent diffusion coefficient (ADC) were measured at three levels as well as signal intensity ratio (SIR), flattening ratio (FR) and retinacular bowing ratio. Comparison between the two groups was done. Results: CSA is increased in CTS patients compared to healthy controls. The cut off value for CSA at pisiform bone was little more sensitive than maximum CSA. SIR & FR showed no significant difference between CTS patients and control groups. RBR is increased in CTS patients. FA is decreased in CTS patients. Significant positive correlation was found between the maximum CSA & highest ADC, and the findings of NCS and significant negative correlation between lowest FA and the findings of NCS. Conclusions: CSA, RBR, FA & ADC are highly significant predictors of carpal tunnel syndrome. FR and SIR are not reliable for diagnosis of carpal tunnel syndrome. Maximum CSA, lowest FA & highest ADC can be used for grading of CTS severity.
Keywords
MR neurography; carpal tnnnel; diffusion tensor imaging; nerve conduction studies


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