Accuracy of automated patient positioning in CT using a 3D camera for body contour detection.
Accuracy of automated patient positioning in CT using a 3D camera for body contour detection.
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DOI：
10.1007/s00330-018-5745-z
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发表时间：
2019-04
影响因子：
5.9
通讯作者：
van Straten M
中科院分区：
文献类型：
--
作者：
Booij R;Budde RPJ;Dijkshoorn ML;van Straten M
评估3D相机在CT中用于身体轮廓检测和患者定位的准确性，并与放射科医生常规的手动定位进行比较。423例患者在扫描仪上进行了头部、胸部和/或腹部的CT扫描，并手动选择了床位高度，另有423名患者在扫描仪上接受了3D相机的床位高度建议。在摄像机组中，桌子高度的建议是基于红外线身体轮廓检测和可缩放的患者模型与3D数据的拟合。合适的位置被定义为扫描仪等中心与患者等中心重合的理想台面高度。通过自动提取每个轴向图像中的皮肤轮廓来计算患者等中心，并对所有图像进行平均。将相机建议和放射技师选择的桌子高度与理想高度进行比较。腹部、头部、胸腹和胸部CT扫描的四分位数绝对高度偏差以毫米为单位的中位数分别为12.0(21.6)、12.2(12.0)、13.4(17.6)和14.7(17.3)。在腹部6.3(6.9)mm、头部9.5(6.8)mm、胸腹6.0(6.1)mm和胸部5.4(6.4)mm处，3D摄像机的偏差明显较小(p <； 0.0 1)。用于身体轮廓检测的3D相机允许精确的患者定位，因此比放射技师所做的人工定位更好，从而大大减小了与理想床位高度的偏差。然而，当系统出现故障或在具有挑战性的情况下，放射技师仍然是不可或缺的。·用于身体轮廓检测的3D摄像头可以准确地定位患者。·在CT检查中，3D相机在患者定位方面的表现超过了放射科医生。·对于由放射技师为身体所有部位进行定位的患者来说，与理想桌子高度的偏差更为严重。
To assess the accuracy of a 3D camera for body contour detection and patient positioning in CT compared to routine manual positioning by radiographers. Four hundred twenty-three patients that underwent CT of the head, thorax, and/or abdomen on a scanner with manual table height selection and 254 patients on a scanner with table height suggestion by a 3D camera were retrospectively included. Within the camera group, table height suggestion was based on infrared body contour detection and fitting of a scalable patient model to the 3D data. Proper positioning was defined as the ideal table height at which the scanner isocenter coincides with the patient’s isocenter. Patient isocenter was computed by automatic skin contour extraction in each axial image and averaged over all images. Table heights suggested by the camera and selected by the radiographer were compared with the ideal height. Median (interquartile range) absolute table height deviation in millimeter was 12.0 (21.6) for abdomen, 12.2 (12.0) for head, 13.4 (17.6) for thorax-abdomen, and 14.7 (17.3) for thorax CT scans positioned by radiographers. The deviation was significantly less (p < 0.01) for the 3D camera at 6.3 (6.9) for abdomen, 9.5 (6.8) for head, 6.0 (6.1) for thorax-abdomen, and 5.4 (6.4) mm for thorax. A 3D camera for body contour detection allows for accurate patient positioning, thereby outperforming manual positioning done by radiographers, resulting in significantly smaller deviations from the ideal table height. However, radiographers remain indispensable when the system fails or in challenging cases. • A 3D camera for body contour detection allows for accurate patient positioning. • A 3D camera outperformed radiographers in patient positioning in CT. • Deviation from ideal table height was more extreme for patients positioned by radiographers for all body parts.
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DOI：
10.1016/j.ejmp.2011.06.002
发表时间：
2012-07-01
影响因子：
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