Type:
Educational Exhibit
Keywords:
Neuroradiology peripheral nerve, MR, Ultrasound, Diagnostic procedure, Education, Other
Authors:
M. Mangi, S. Zadow, W. Lim
DOI:
10.26044/ranzcr2022/R-0018
Background
Peripheral nerves of the upper limb can become entrapped at various points during their anatomical course. There are multiple imaging options, especially ultrasound and magnetic resonance imaging (MRI), that offer information about the cause and location of nerve entrapment, which in turn helps guide treatment [1].
Ultrasound is an effective imaging modality for entrapment syndromes as it is cheap, fast, has high spatial resolution, and allows a dynamic search for pathology [2, 3, 4]. The drawbacks of ultrasound are its small field of view and the fact that it is operator dependent [3].
MRI of peripheral nerves uses T1-weighted and fluid-sensitive sequences [3]. Magnetic resonance neurography (MRN) is a technique which utilises the longer T2 isolation time of nerves [5]. Benefits of MRI include better visualization of deep nerves and high contrast resolution [2, 3]. The drawbacks are its cost, time-consumption, contraindications (e.g. pacemakers), and signal contamination from foreign bodies or blood [3].
This poster showcases various types and causes of entrapment neuropathies of the upper limb.