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Chapter
6: The Hand and Wrist
David
Stoller, MD |
6.3
- Wrist Arthrography
To have
accuracy rates matching arthrography, a matrix size
of 512 x 384 is required in the coronal plane in non-arthrography
cases. This is often not practical because of scheduling
demands. Therefore, MR arthrography is often a useful
alternative for looking at tears of the intrinsic ligaments,
particularly the scapholunate ligament complex, or the
lunotriquetral ligament complex.
The coronal plane is particularly useful for evaluating
the volar radiocarpal ligaments which consist of the
radioscaphocapitate, radiolunotriquetral, or long radiolunate,
and radioscapholunate ligaments. The axial plane is
particularly useful for evaluating the carpal tunnel,
evaluating tenosynovitis, assessing the morphology and
signal characteristics of the medial nerve, and also
the detection of ganglions.
The sagittal plane is useful for evaluating the TFCC
and its component parts including the dorsal and volar
radioulnar ligaments and the articular disc. The alignment
of the carpus in a static state is assessed by evaluating
the capitolunate angle provided that the wrist is positioned
without either ulnar or radial deviation.
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