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Magnetic Resonance Imaging Classification Using the Three-Dimensional T2-weighted SPACE Method for Brachial Plexus

Kazuteru Doi1, Yasunori Hattori1, Sotetsu Sakamoto1

  • 1Department of Orthopedic Surgery, Ogori Daiichi General Hospital, Yamaguchi-city, Yamaguchi prefecture, Japan.

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|April 3, 2026
PubMed
Summary
This summary is machine-generated.

Three-dimensional T2-weighted SPACE (3D-T2-SPACE) MRI effectively classifies preganglionic injuries in traumatic brachial plexus injury (BPI). This imaging technique aids in accurate diagnosis and guides surgical planning for nerve repair and reconstruction.

Keywords:
3D-T2- SPACE imageBrachial plexus injuryclassificationmagnetic resonance imagingpreganglionic injury

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Area of Science:

  • Neurology
  • Radiology
  • Orthopedic Surgery

Background:

  • Traumatic brachial plexus injury (BPI) often involves complex intravertebral and extravertebral lesions.
  • Accurate classification of preganglionic injuries is crucial for effective treatment planning.
  • Three-dimensional T2-weighted SPACE (3D-T2-SPACE) MRI has shown promise in visualizing these injuries.

Purpose of the Study:

  • To classify preganglionic injuries in BPI using 3D-T2-SPACE MRI findings.
  • To evaluate the diagnostic validity of 3D-T2-SPACE MRI for intravertebral injuries in BPI.
  • To correlate imaging findings with injury types and patient outcomes.

Main Methods:

  • 206 BPI patients underwent 3D-T2-SPACE MRI.
  • Intravertebral structures (spinal cord, rootlets, nerve roots, dorsal root ganglions) were assessed.
  • Extravertebral lesions were evaluated using T2-STIR images for root continuity, signal changes, edema, hypertrophy, and displacement.

Main Results:

  • Intravertebral lesions were classified into five types (M, A, B, C, N/D).
  • Meningeal cysts, spinal edema, and rootlet absence were key indicators of preganglionic injuries.
  • Type N/D, indicating potential for nerve repair, was more frequent in the C5 root and useful for surgical method selection.

Conclusions:

  • 3D-T2-SPACE MRI enables detailed, noninvasive classification of preganglionic BPI.
  • This classification supports accurate diagnosis and guides reconstructive procedures.
  • It may reduce the need for surgical diagnostic exploration of the brachial plexus.