Lin Zhang1,2, ChunMei Tian3, PeiYuan Wang2, Liang Chen2, XiJin Mao2, ShanShan Wang2, Xu Wang2, JingMin Dong2, Bin Wang4. 1. Shandong Medical Imaging Research Institute, Shandong University, No. 324, Jingwu Road, Jinan, 250021, Shandong, China. 2. Department of Radiology, Affiliated Hospital of Binzhou Medical University, No. 661, Huanghe 2 Road, Binzhou, 256603, Shandong, China. 3. Department of Pediatrics, Affiliated Hospital of Binzhou Medical University, No. 661, Huanghe 2 Road, Binzhou, 256603, Shandong, China. 4. Binzhou Medical University, No. 346, Guanhai Road, Yantai, 264003, Shandong, China. binwang001@aliyun.com.
Abstract
OBJECTIVE: To compare image quality of turbo spin-echo (TSE) with BLADE [which is also named periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER)] on magnetic resonance imaging (MRI) for upper abdomen. MATERIALS AND METHODS: This study involved the retrospective evaluation of 103 patients (63 males, 40 females; age range 19-76 years; median age 53.8 years) who underwent 3.0 T MRI with both conventional TSE T2-weighted imaging (T2WI) and BLADE TSE T2WI. Two radiologists assessed respiratory motion, gastrointestinal peristalsis, and vascular pulsation artifacts, as well as the sharpness of the liver and pancreas edges. Scores for all magnetic resonance (MR) images were recorded. Wilcoxon's rank test was used to compare hierarchical data. Cohen's kappa coefficient was adopted to analyze interobserver consistency. RESULTS: Compared to TSE T2WI, BLADE TSE T2WI reduced all of the examined motion artifacts and increased the sharpness of the liver and pancreas edges (all P < 0.05). Medium to good interobserver consistency was obtained for evaluating these indicators. The scanning time of BLADE TSE T2WI was 4-16 s shorter than that of conventional TSE T2WI. CONCLUSION: Compared to TSE sequence, the BLADE technique can reduce the respiratory motion, gastrointestinal peristalsis, and vascular pulsation artifacts, while decreasing the scanning time and improving the anatomic detail and image quality.
OBJECTIVE: To compare image quality of turbo spin-echo (TSE) with BLADE [which is also named periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER)] on magnetic resonance imaging (MRI) for upper abdomen. MATERIALS AND METHODS: This study involved the retrospective evaluation of 103 patients (63 males, 40 females; age range 19-76 years; median age 53.8 years) who underwent 3.0 T MRI with both conventional TSE T2-weighted imaging (T2WI) and BLADE TSE T2WI. Two radiologists assessed respiratory motion, gastrointestinal peristalsis, and vascular pulsation artifacts, as well as the sharpness of the liver and pancreas edges. Scores for all magnetic resonance (MR) images were recorded. Wilcoxon's rank test was used to compare hierarchical data. Cohen's kappa coefficient was adopted to analyze interobserver consistency. RESULTS: Compared to TSE T2WI, BLADE TSE T2WI reduced all of the examined motion artifacts and increased the sharpness of the liver and pancreas edges (all P < 0.05). Medium to good interobserver consistency was obtained for evaluating these indicators. The scanning time of BLADE TSE T2WI was 4-16 s shorter than that of conventional TSE T2WI. CONCLUSION: Compared to TSE sequence, the BLADE technique can reduce the respiratory motion, gastrointestinal peristalsis, and vascular pulsation artifacts, while decreasing the scanning time and improving the anatomic detail and image quality.
Authors: Manuel Mateos-Fernández; Fernando Mas-Estellés; Carlos de Paula-Vernetta; Abel Guzmán-Calvete; Ricardo Villanueva-Martí; Constantino Morera-Pérez Journal: Acta Otorrinolaringol Esp Date: 2012-10-23
Authors: Johannes M Froehlich; Thierry Metens; Bianka Chilla; Nik Hauser; Markus Klarhoefer; Rahel A Kubik-Huch Journal: Insights Imaging Date: 2012-09-26