Hm. Bonel et al., Carpal tunnel syndrome: assessment by turbo spin echo, spin echo, and magnetization transfer imaging applied in a low-field MR system, J COMPUT AS, 25(1), 2001, pp. 137-145
Citations number
25
Categorie Soggetti
Radiology ,Nuclear Medicine & Imaging","Medical Research Diagnosis & Treatment
Purpose: The purpose of this work was to evaluate patients with carpal tunn
el syndrome (CTS) using a low-field extremity MR system (E-MRI; 0.2 T).
Method: Twenty-two patients with typical findings of CTS and 30 control per
sons were imaged on an E-MRI, Axial T2-weighted turbo SE (TSE), T1-weighted
SE sequences, and 2D GRE magnetization transfer (MTC) sequences were compa
red. SE and MTC sequences were obtained before and after contrast agent adm
inistration (0.1 mmol/kg body wt of Gd-DTPA). Two readers evaluated typical
MR findings of CTS independently.
Results: Patients with CTS demonstrated palmar bowing of the flexor retinac
ulum significantly more often. The normal or edematous median nerve was bes
t identified on TSE and MTC scans (kappa = 0.59 and 0.8). The MTC sequences
showed perineural enhancement significantly better than respective T1-weig
hted SE sequences but were rated second in comparison with T2-weighted TSE
scans.
Conclusion: At low-field strength, median nerve edema is best depicted on T
2-weighted TSE sequences, whereas MTC sequences are most sensitive to perin
eural contrast enhancement.