Volume rendering of 3D data sets composed of sequential 2D medical images has become an important branch in image processing and computer graphics. To help physicians fully understand deep seated human organs and foc...Volume rendering of 3D data sets composed of sequential 2D medical images has become an important branch in image processing and computer graphics. To help physicians fully understand deep seated human organs and focuses ( e.g. a tumour) as 3D structures, in this paper, we present a modified volume rendering algorithm to render volumetric data. Using this method, the projection images of structures of interest from different viewing directions can be obtained satisfactorily. By rotating the light source and the observer eyepoint, this method avoids rotates the whole volumetric data in main memory and thus reduces computational complexity and rendering time. Experiments on CT images suggest that the proposed method is useful and efficient for rendering 3D data sets.展开更多
目的分析64层螺旋CT三维容积再现图像在肋骨骨折诊断中应用价值。方法选择如皋市人民医院2015年1月至2018年3月胸外伤疑似肋骨骨折且影像学检查资料完整的患者61例,其中男性41例,女性20例;年龄24~66岁,平均年龄46.6岁。行X射线检测、CT...目的分析64层螺旋CT三维容积再现图像在肋骨骨折诊断中应用价值。方法选择如皋市人民医院2015年1月至2018年3月胸外伤疑似肋骨骨折且影像学检查资料完整的患者61例,其中男性41例,女性20例;年龄24~66岁,平均年龄46.6岁。行X射线检测、CT扫描和图像重建。比较X射线诊断与64层螺旋CT三维容积再现图像在肋骨骨折诊断时确诊率及漏诊情况。结果 61例经临床及影像学证实共124处骨折,其中多发骨折患者占65.6%;骨折部位多在腋段,占60.5%(75/124)。螺旋CT三维容积再现确诊58例119处骨折,X射线诊断确诊45例96处骨折;螺旋CT三维容积再现确诊率明显高于X射线诊断[96.0%(119/124) vs 77.4%(96/124)],差异有显著统计学意义(P=0.000 <0.01)。X射线诊断漏诊16例28处(占22.6%),其中膈下肋骨7处,腋段肋骨11处,肋骨弓部5处,靠近肋软骨5处。螺旋CT三维容积再现漏诊3例5处(占4.03%),其中3处靠近肋软骨,2处靠近肋胸椎。64层螺旋CT三维容积再现尚发现患者合并锁骨骨折4处,颈椎及胸椎骨折4处,肺挫伤7例,胸腔积液5例。结论应用64层螺旋CT三维容积再现图像技术提高了肋骨骨折的确诊率,诊断隐匿性肋骨骨折及并发症时效果更优,值得在临床推广使用。展开更多
文摘Volume rendering of 3D data sets composed of sequential 2D medical images has become an important branch in image processing and computer graphics. To help physicians fully understand deep seated human organs and focuses ( e.g. a tumour) as 3D structures, in this paper, we present a modified volume rendering algorithm to render volumetric data. Using this method, the projection images of structures of interest from different viewing directions can be obtained satisfactorily. By rotating the light source and the observer eyepoint, this method avoids rotates the whole volumetric data in main memory and thus reduces computational complexity and rendering time. Experiments on CT images suggest that the proposed method is useful and efficient for rendering 3D data sets.
文摘目的分析64层螺旋CT三维容积再现图像在肋骨骨折诊断中应用价值。方法选择如皋市人民医院2015年1月至2018年3月胸外伤疑似肋骨骨折且影像学检查资料完整的患者61例,其中男性41例,女性20例;年龄24~66岁,平均年龄46.6岁。行X射线检测、CT扫描和图像重建。比较X射线诊断与64层螺旋CT三维容积再现图像在肋骨骨折诊断时确诊率及漏诊情况。结果 61例经临床及影像学证实共124处骨折,其中多发骨折患者占65.6%;骨折部位多在腋段,占60.5%(75/124)。螺旋CT三维容积再现确诊58例119处骨折,X射线诊断确诊45例96处骨折;螺旋CT三维容积再现确诊率明显高于X射线诊断[96.0%(119/124) vs 77.4%(96/124)],差异有显著统计学意义(P=0.000 <0.01)。X射线诊断漏诊16例28处(占22.6%),其中膈下肋骨7处,腋段肋骨11处,肋骨弓部5处,靠近肋软骨5处。螺旋CT三维容积再现漏诊3例5处(占4.03%),其中3处靠近肋软骨,2处靠近肋胸椎。64层螺旋CT三维容积再现尚发现患者合并锁骨骨折4处,颈椎及胸椎骨折4处,肺挫伤7例,胸腔积液5例。结论应用64层螺旋CT三维容积再现图像技术提高了肋骨骨折的确诊率,诊断隐匿性肋骨骨折及并发症时效果更优,值得在临床推广使用。
