Detection of colonic polyps in a phantom model: implications for virtual colonoscopy data acquisition.
Detection of colonic polyps in a phantom model: implications for virtual colonoscopy data acquisition.
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模型模型中结肠息肉的检测：对虚拟结肠镜检查数据采集的影响。
DOI：
10.1097/00004728-199807000-00028
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发表时间：
1998
影响因子：
1.3
通讯作者：
JeffreyJr,RB
中科院分区：
文献类型：
--
作者：
Beaulieu,CF;Napel,S;Daniel,BL;Ch'en,IY;Rubin,GD;Johnstone,IM;JeffreyJr,RB
目的：仿真结肠镜是一种新的结肠检查方法，它利用螺旋CT的计算机辅助三维可视化技术模拟纤维结肠镜。我们使用了一个结肠体模包含不同大小的球体，以确定CT采集参数对病变的可检测性和sizing.Method的影响：直径为2.5，4，6，8，和10 mm的球形塑料珠被随机附加到塑料管段的内壁。在3/1、3/2、5/1和5/2准直（mm）/间距设置下，在垂直和平行于扫描仪机架的方向上扫描每组三个密封管。对于每次采集，图像集以0.5 mm至5.0 mm的间隔重建。两名盲态审查员评估体模的横截面以进行珠检测，使用源CT图像进行采集，其中管垂直于机架定向，并使用正交重新格式化图像进行平行于机架定向的扫描。结果：对于两个管方向和所有准直器/间距设置和重建间隔，≥ 4 mm的微珠检测率均为100%。对于2.5 mm微珠，当体模部分平行于机架定向时，5 mm准直/间距2扫描的检测率降至78-94%（p= 0.01）。随着准直度和螺距的增加，切片方向上的珠子明显伸长。大部分（约75%）的延长归因于准直器从3 mm改变为5 mm，其余的延长归因于螺距从1增加到2。结论：在本模型中，以5 mm准直和螺距2进行CT扫描足以检测小至4 mm的高对比度病变。然而，病变大小和几何形状的描述不如在较窄准直和较低螺距设置下准确。
Purpose:Virtual colonoscopy is a new method of colon examination in which computer-aided 3D visualization of spiral CT simulates fiberoptic colonoscopy. We used a colon phantom containing various-sized spheres to determine the influence of CT acquisition parameters on lesion detectability and sizing.Method:Spherical plastic beads with diameter of 2.5, 4, 6, 8, and 10 mm were randomly attached to the inner wall of segments of plastic tubing. Groups of three sealed tubes were scanned at 3/1, 3/2, 5/1, and 5/2 collimation (mm)/pitch settings in orientations perpendicular and parallel to the scanner gantry. For each acquisition, image sets were reconstructed at intervals from 0.5, to 5.0 mm. Two blinded reviewers assessed transverse cross-sections of the phantoms for bead detection, using source CT images for images for acquisitions obtained with the tubes oriented perpendicular to the gantry and using orthogonal reformatted images for scans oriented parallel to the gantry.Results:Detection of beads of≥ 4 mm was 100% for both tube orientations and for all collimator/pitch settings and reconstruction intervals. For the 2.5 mm beads, detection decreased to 78-94% for 5 mm collimation/pitch 2 scans when the phantom sections were oriented parallel to the gantry (p= 0.01). Apparent elongation of beads in the slice direction occurred as the collimation and pitch increased. The majority of the elongation (∼ 75%) was attributed to changing the collimator from 3 to 5 mm, with the remainder of the elongation due to doubling the pitch from 1 to 2.Conclusion:CT scanning at 5 mm collimation and up to pitch 2 is adequate for detection of high contrast lesions as small as 4 mm in this model. However, lesion size and geometry are less accurately depicted than at narrower collimation and lower pitch settings.
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影响因子：
19.7
作者：
T. Vogl;A. Stupavsky;W. Pegios;R. Hammerstingl;M. Mack;T. Diebold;K. Lodemann;P. Neuhaus;R. Felix
通讯作者：
T. Vogl;A. Stupavsky;W. Pegios;R. Hammerstingl;M. Mack;T. Diebold;K. Lodemann;P. Neuhaus;R. Felix
使用 CT 结肠成像检测结直肠息肉：二维技术与三维技术。
影响因子：
19.7
作者：
Ayako Hara;C. Johnson;J. Reed;R. Ehman;D. Ilstrup
通讯作者：
D. Ilstrup
CT 和 MR 图像的透视体积渲染：内窥镜成像的应用。
DOI：
10.1148/radiology.199.2.8668772
发表时间：
1996
期刊：
Radiology.
影响因子：
--
作者：
Rubin,GD;Beaulieu,CF;Argiro,V;Ringl,H;Norbash,AM;Feller,JF;Dake,MD;Jeffrey,RB;Napel,S
通讯作者：
Napel,S
螺旋 CT 结肠成像的结直肠息肉可视化：通过透视体积渲染评估处理参数。
影响因子：
19.7
作者：
McFarland,EG;Brink,JA;Loh,J;Wang,G;Argiro,V;Balfe,DM;Heiken,JP;Vannier,MW
通讯作者：
Vannier,MW
猪结肠模拟小息肉：CT 虚拟结肠成像的敏感性。
影响因子：
19.7
作者：
A. Dachman;J. Lieberman;R. Osnis;S Y Chen;K. Hoffmann;C. T. Chen;G. Newmark;J. McGill
通讯作者：
J. McGill