Dynamic Study of the Tracheal Cavity by Fast MRI with Coughing in Patients with Tracheomalacia

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概要

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• Fast magnetic resonance imaging (MRI) with coughing was performed in 3 patients with tracheomalacia (TM) and 10 healthy volunteers, and its usefulness was evaluated. Twenty serial images were obtained using two-dimensional-turbo fast low angle shot (FLASH) sequences and the image data were transferred to a graphic workstation connected on-line. The maximum and minimum cross-sectional areas of the trachea were measured during deep breathing (forced expiration and inspiration) and during coughing, and the collapsibility index (CI) = [(maximum cross-sectional area - minimum cross-sectional area)/maximum cross-sectional area] × 100 (%) was calculated. In the healthy volunteers, CI was 36 ± 15% (mean ± SD) during forced expiration and inspiration and 48 ± 15% during coughing, and the difference was not significant. In the TM patients, it was 68 ± 6% and 85 ± 5%, respectively, with the value during coughing being significantly higher (P = 0.019). CI was signifiァantly higher in the TM patients than in the normal volunteers both during forced expiration and inspiration (P = 0.006) and during coughing (P = 0.002). Fast MRI with coughing may facilitate the evaluation of the tracheal collapsibility in TM.

• 鳥取大学の論文

著者

• SUTO Yuji

  Department of Radiology, Faculty of Medicine, Tottori University

• Suto Yuji

  Department Of Radiology Faculty Of Medicine Tottori University

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