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c-arm Lipiodol cT in transcatheter arterial chemoembolization for small hepatocellular carcinoma

World Journal of Gastroenterology 2015年第10期21卷 3035-3040页

作者： Jian-Jun Li Jia-Sheng Zheng Shi-chang cui Xiong-Wei cui cai-Xia Hu Da Fang Lin-chao Ye Oncology and Hepatobiliary Minimally Invasive Interventional center Beijing Youan Hospital Capital Medical University AX Business Group Healthcare Sector Siemens Ltd.China

AIM:To investigate the value of c-arm Lipiodol computed tomography(cT) for intra-procedural hepatocellular carcinoma(Hcc) lesion detection during transcatheter arterial chemoembolization(TAcE).METHODS:Forty patients(37 male,3 female;mean age,52.6 ± 12.5 years,age range:25-82 years) diagnosed with Hcc were enrolled in this *** patients underwent 64-slice cT 1-2 wk before *** the procedure,hepatic angiography was performed *** diagnostic embolization with Lipiodol injected into the hepatic artery,a c-arm cT scan was immediately conducted(c-arm Lipiodol cT).If new Hcc lesions were confirmed,gelfoam particles were super-selectively injected into the tumor-nourishing blood vessel.A Lipiodol cT scan was performed 7-14 d after *** images acquired from 64-slice cT,digital subtraction angiography(DSA),c-arm Lipiodol cT and Lipiodol cT were retrospectively reviewed by four radiologists and the number of detected lesions in each examination was counted,*** results of Lipiodol cT were taken as the diagnostic ***-fetoprotein values were examined both before and after *** study only takes into account the lesions that were not found or were considered suspicious on 64-slice cT before ***:Preprocedural 64-slice cT detected a total of 13 suspicious lesions in the 40 *** detected ten definite and four suspicious lesions.c-arm Lipiodol cT detected 71 lesions in total and Lipiodol cT confirmed 67 lesions with a diameter range of 3-12 *** false-positive lesions,which were detected by c-arm Lipiodol cT,were considered to be hepatic artery-portal vein *** average alpha-fetoprotein values before and after TAcE were significantly different(452.3 ± 192.6 ng/m L vs 223.8 ± 93.2 ng/m L;P = 0.039).cONcLUSION:c-arm Lipiodol cT has a higher diagnostic sensitivity for small Hcc *** technique may help physicians make intraproceduraldecisions to provide patients with earlier treatment.

关键词： Hepatocellular carcinoma c-arm computed tomography

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Application of a Fast connected components Labeling Algorithm in Processing Landmark Images

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Journal of Shanghai Jiaotong university(Science) 2007年第3期12卷 383-387,393页

作者：闫士举王成焘陈统一袁文苏颖颖 School of Mechanical Eng. Shanghai Jiaotong Univ. Dept. of Orthopaedics Zhongshan Hospital Dept. of Orthopaedics Changzheng Hospital

Extracting geometric data of landmarks from fluoroscopic images plays an important role in camera calibration process of a fluoroscopic-image-based surgical navigation system. connected components labeling is the essential technique for the extraction. A new fast connected components labeling algorithm was presented. The definition of upward concave set was introduced to explain the algorithm. Feasibility and efficiency of the algorithm were verified with experiments. This algorithm performs well in labeling non-upward concave set connected components and applies to landmarks labeling well. Moreover, the proposed algorithm possesses a desirable characteristic that will facilitate the subsequent processing of fluoroscopic images.

关键词： c-arm surgical navigation system connected components labeling convex set

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A Target-Orientated Marker Image Binarization Method for Orthopaedic Surgical Navigation System

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Journal of Shanghai Jiaotong university(Science) 2007年第1期12卷 18-22页

作者：闫士举陈晓军王成焘苏颖颖夏庆 Life Quality via Mechanical Eng.Institute School of Mechanical Eng.Shanghai Jiaotong Univ. Orthopaedics Zhongshan Hospital Affiliated to Fudan Univ.

camera calibration is the key technique in a c-arm based orthopaedic surgical navigation system. The extraction of marker location information is a necessary step in the calibration process. Ideal marker images should possess uniform background and contain marker shadow only, but in fact marker images always possess nonuniform background and are contaminated by noise and unwanted anatomic information, making the extraction very difficult. A target-orientated marker shadow extraction method was proposed. With this method a proper threshold for marker image binarization can be determined.

关键词： c-arm orthopaedic surgery marker image binarization gray-scale threshold

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一般直线-圆弧扫描轨迹cT的三维精确重建

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电子学报 2007年第7期35卷 1382-1386页

作者：左年明夏丹蒋田仔邹宇潘晓川中国科学院自动化研究所模式识别国家重点实验室中国北京100080 美国芝加哥大学放射系美国芝加哥60637

近年,c-arm cT扫描系统的推出,给实际的扫描轨迹提供了很大的灵活性,比如圆弧-圆弧及直线-圆弧等扫描轨迹,针对于不同的成像及放疗部位,它们将具有很好的应用前景.最近提出的BPF算法不但可以处理投影数据的纵向截断问题,而且也可以处理... 详细信息

近年,c-arm cT扫描系统的推出,给实际的扫描轨迹提供了很大的灵活性,比如圆弧-圆弧及直线-圆弧等扫描轨迹,针对于不同的成像及放疗部位,它们将具有很好的应用前景.最近提出的BPF算法不但可以处理投影数据的纵向截断问题,而且也可以处理投影数据的横向截断问题,这使得精确的局部重建成为可能.为了更好的进行局部重建,本文提出了一种一般形式的直线-圆弧扫描轨迹,并且针对这种扫描轨迹,基于上述的BPF算法,提出了一个通用的三维精确重建算法,它可以适用于直线和圆弧所在平面成任意角度的成像系统.这将更进一步的接近真正意义上的局部重建.文章最后的实验结果也证明了我们算法的有效性.

关键词：锥束cT(computed Tomography) 三维精确重建 c-arm 直线-圆弧轨迹

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