CT colonography: Value of scanning in both the supine and prone positions
CT colonography: Value of scanning in both the supine and prone positions
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DOI：
10.2214/ajr.172.3.10063842
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发表时间：
1999-03-01
影响因子：
5
通讯作者：
Kadell, BM
中科院分区：
文献类型：
--
作者：
Chen, SC;Lu, DSK;Kadell, BM
OBJECTIVE.本研究的目的是评估病人在仰卧位和俯卧位进行CT结肠成像的有效性。我们评估了两个位置的成像是否减少了塌陷结肠段的数量，并增加了息肉检测的灵敏度。23例患者在仰卧位和俯卧位进行CT结肠成像。对46次扫描的结肠扩张进行分级。比较两种体位组合与单独体位的扩张准确性。回顾性分析结肠镜检查发现的息肉数据，然后回顾性分析CT数据以进行息肉检测。当单独考虑每一次扫描而不考虑对侧位扫描时，46次扫描中有27次（58.7%）显示扩张不足。当同时考虑两种体位获得的扫描结果时，23例患者中有20例（87.0%）具有使用的分级系统的充分扩张。但当考虑到3例患者扩张不足的原因时，23例患者中的23例（100%）增加了这一值。在结肠镜检查发现的27个息肉中，21例（77.8%）也被CT结肠造影回顾性发现。结肠镜检查显示20个5 mm或更大的息肉;这20个息肉中的19个（95.0%）也被CT结肠造影回顾性发现，其中9个（47.4%）仅在一个位置被发现。对接受CT结肠造影术的患者同时使用仰卧位和俯卧位可改善结肠的评估，并增加息肉检测的灵敏度。
OBJECTIVE. The purpose of this study was to evaluate the effectiveness of CT colonography when patients were imaged in both the supine and prone positions. We evaluated whether imaging in two positions decreased the number of collapsed colonic segments and increased sensitivity for polyp detection.MATERIALS AND METHODS. Twenty-three patients underwent CT colonography in both the supine and prone positions. Colonic distention for each of the 46 scans was graded. Adequacy of distention for either position alone was compared with that of the combination of the two positions. Polyp data revealed by colonoscopy were reviewed, and the CT data were then retrospectively reviewed for polyp detection.RESULTS. When each scan was considered alone without benefit of the scan obtained in the opposite position, 27 (58.7%) of 46 scans showed inadequate distention. When scans obtained in both positions were considered together, 20 (87.0%) of 23 patients had adequate distention with the grading system used. However, this value increased to 23 (100%) of 23 patients when the reasons for inadequate distention in the three patients were considered, Of the 27 polyps detected with colonoscopy, 21 (77.8%) were also detected retrospectively with CT colonography. Colonoscopy showed 20 polyps that were 5 mm or larger; nineteen (95.0%) of these 20 polyps were also detected retrospectively with CT colonography, nine (47.4%) of which were seen in only one position.CONCLUSION. Use of both the supine and prone positions for patients undergoing CT colonography improves evaluation of the colon and increases sensitivity for polyp detection.