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01-05-2006 | Scientific Article

High-resolution MR imaging of the proximal zone of the lunotriquetral ligament with a microscopy coil

Authors: Hiroshi Yoshioka, Toshikazu Tanaka, Teruko Ueno, Masashi Shindo, John A. Carrino, Philipp Lang, Carl S. Winalski

Published in: Skeletal Radiology | Issue 5/2006

Abstract

Objective

To evaluate high-resolution MRI of the proximal zone of the lunotriquetral ligament (LTL) using a microscopy surface coil with a 1.5 T scanner.

Design and subjects

The proximal zone of the LTL was reviewed in 90 subjects (23 asymptomatic normal volunteers and 67 patients with suspicion of triangular fibrocartilage complex injury) with high-resolution MRI using a 47-mm microscopy surface coil. High-resolution MR images were obtained with gradient recalled echo (GRE) T2*-weighted sequence and short tau inversion recovery imaging, with a 1- to 1.5-mm slice thickness, a 50-mm field of view, an imaging matrix of 140-224×512 using zero fill interpolation, and 3-4 excitations. As a qualitative analysis, the LTL was classified in shape and signal intensity.

Results

The triangle-shaped low-signal-intensity LTL was identified in 77 of 90 subjects (85.6%) on GRE images. The triangle was classified as regular (41.1%), broad-based (20.0%), narrow-based (6.7%), or asymmetrical (17.8%). The bar-shaped ligament was seen in one patient, and unclassified ligaments were seen in 12 patients. All volunteers showed triangle-shaped LTL. The MR signal intensity of the proximal zone in the LTL was characterized as homogeneously low intensity (type 1; 33.8%), linear intermediate or high signal intensity traversing the distal surface of the LTL (type 2; 45.5%), and linear intermediate or high intensity traversing both distal and proximal surfaces of LTL (type 3; 20.8%).

Conclusion

The proximal zone of the LTL showed a broad spectrum of normal variations in shape and signal intensity on high-resolution MR images with a microscopy coil.

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Title: High-resolution MR imaging of the proximal zone of the lunotriquetral ligament with a microscopy coil
Authors: Hiroshi Yoshioka
Toshikazu Tanaka
Teruko Ueno
Masashi Shindo
John A. Carrino
Philipp Lang
Carl S. Winalski
Publication date: 01-05-2006
Publisher: Springer-Verlag
Published in: Skeletal Radiology / Issue 5/2006
Print ISSN: 0364-2348
Electronic ISSN: 1432-2161
DOI: https://doi.org/10.1007/s00256-005-0070-4

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

High-resolution MR imaging of the proximal zone of the lunotriquetral ligament with a microscopy coil

Abstract

Objective

Design and subjects

Results

Conclusion

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Objective

Design and subjects

Results

Conclusion

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