Minako Azuma1, Zaw Aung Khant2, Masami Yoneyama3, Ichiro Ikushima4, Hideaki Hamanaka5, Kiyotaka Yokogami6, Etsuo Chosa5, Hideo Takeshima6, Toshinori Hirai7. 1. Department of Radiology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan. minako_azuma@med.miyazaki-u.ac.jp. 2. Department of Radiology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan. 3. Philips Japan, Tokyo, Japan. 4. Miyakonojo Medical Association Hospital, Miyazaki, Japan. 5. Departments of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan. 6. Departments of Neurosurgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan. 7. Departments of Radiology, Kumamoto University, Kumamoto, Japan.
Abstract
PURPOSE: We aimed to evaluate the feasibility of 3D broadband inversion-recovery-prepared ultrashort echo-time (3D IRP UTE) imaging for assessing ossification of the posterior longitudinal ligament (OPLL). MATERIALS AND METHODS: The study consisted of 25 consecutive patients with cervical OPLL [13 women, 12 men; mean age 66.3 (47-84) years] who underwent CT, 3T conventional MR, and 3D IRP UTE imaging studies. Two readers independently assessed the 3D IRP UTE images for the type (mixed, continuous, circumscribed, segmental) and distribution of OPLL. All readers consensually assessed the diagnostic certainty of OPLL on conventional MR and 3D IRP UTE images by using a 3-point scale system. Interobserver and intermodality agreement was assessed by κ statistics. A Wilcoxon signed-rank test was used to evaluate the difference of diagnostic certainty between conventional MR and 3D IRP UTE imaging. RESULTS: Interobserver and intermodality agreements were good (κ = 0.73) and excellent (κ = 0.81) for the OPLL type, and excellent (κ = 0.85) and good (κ = 0.76) for the assessment of the distribution of OPLL, respectively. The mean level of the diagnostic certainty of OPLL was significantly higher for 3D IRP UTE than conventional MR imaging (p = 0.002). CONCLUSION: 3D IRP UTE imaging may be useful for assessing OPLL.
PURPOSE: We aimed to evaluate the feasibility of 3D broadband inversion-recovery-prepared ultrashort echo-time (3D IRP UTE) imaging for assessing ossification of the posterior longitudinal ligament (OPLL). MATERIALS AND METHODS: The study consisted of 25 consecutive patients with cervical OPLL [13 women, 12 men; mean age 66.3 (47-84) years] who underwent CT, 3T conventional MR, and 3D IRP UTE imaging studies. Two readers independently assessed the 3D IRP UTE images for the type (mixed, continuous, circumscribed, segmental) and distribution of OPLL. All readers consensually assessed the diagnostic certainty of OPLL on conventional MR and 3D IRP UTE images by using a 3-point scale system. Interobserver and intermodality agreement was assessed by κ statistics. A Wilcoxon signed-rank test was used to evaluate the difference of diagnostic certainty between conventional MR and 3D IRP UTE imaging. RESULTS: Interobserver and intermodality agreements were good (κ = 0.73) and excellent (κ = 0.81) for the OPLL type, and excellent (κ = 0.85) and good (κ = 0.76) for the assessment of the distribution of OPLL, respectively. The mean level of the diagnostic certainty of OPLL was significantly higher for 3D IRP UTE than conventional MR imaging (p = 0.002). CONCLUSION: 3D IRP UTE imaging may be useful for assessing OPLL.
Entities:
Keywords:
3D broadband inversion-recovery-prepared ultrashort echo-time imaging; CT; Ossification of the posterior longitudinal ligament
Authors: Shihong Li; Lanqing Ma; Eric Y Chang; Hongda Shao; Jun Chen; Christine B Chung; Graeme M Bydder; Jiang Du Journal: NMR Biomed Date: 2014-10-28 Impact factor: 4.044