Clinical Significance of Maximum Intensity Projection Method for Diagnostic Imaging of Thoracic Outlet Syndrome
Takeshi Ogawa,
Shinzo Onishi,
Naotaka Mamizuka,
Yuichi Yoshii,
Kazuhiro Ikeda,
Takeo Mammoto,
Masashi Yamazaki
Affiliations
Takeshi Ogawa
Department of Orthopedic Surgery, National Hospital Organization Mito Medical Center, 280 Sakuranosato, Ibarakimachi 311-3193, Japan
Shinzo Onishi
Department of Orthopedic Surgery and Sports Medicine, Mito Clinical Education and Training Center, University of Tsukuba Hospital, Mito Kyodo General Hospital, 3-2-7 Miya-Machi, Mito 310-0015, Japan
Naotaka Mamizuka
Baseball and Sports Clinic, 2-228-1 Kosugi, Park City Musashikosugi the Garden Towers West 1st Floor W4, Nakahara-Ward, Kawasaki 211-0063, Japan
Yuichi Yoshii
Department of Orthopedic Surgery, Tokyo Medical University Ibaraki Medical Center, Ami 300-0395, Japan
Kazuhiro Ikeda
Department of Orthopedic Surgery, Kikkoman General Hospital, Noda 278-0005, Japan
Takeo Mammoto
Department of Orthopedic Surgery and Sports Medicine, Mito Clinical Education and Training Center, University of Tsukuba Hospital, Mito Kyodo General Hospital, 3-2-7 Miya-Machi, Mito 310-0015, Japan
Masashi Yamazaki
Department of Orthopedic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8577, Japan
The aim of this study was to use the magnetic resonance imaging maximum-intensity projection (MRI-MIP) method for diagnostic imaging of thoracic outlet syndrome (TOS) and to investigate the stricture ratios of the subclavian artery (SCA), subclavian vein (SCV), and brachial plexus bundle (BP). A total of 113 patients with clinically suspected TOS were evaluated. MRI was performed in a position similar to the Wright test. The stricture was classified into four grades. Then, the stricture ratios of the SCA, SCV, and BP in the sagittal view were calculated by dividing the minimum diameter by the maximum diameter of each structure. Patients were divided into two groups: surgical (n = 22) and conservative (n = 91). Statistical analysis was performed using the Mann–Whitney U test. The stricture level and ratio in the SCV were significantly higher in the surgical group, while the stricture level and the ratio of SCA to BP did not show significant differences between the two groups. The MRI-MIP method may be helpful for both subsidiary and severe diagnoses of TOS.
