EXTRADURAL HEMATOMAS - MEASUREMENT OF SIZE BY VOLUME SUMMATION ON CT SCANNING
EXTRADURAL HEMATOMAS - MEASUREMENT OF SIZE BY VOLUME SUMMATION ON CT SCANNING
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DOI：
10.1007/bf00327488
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发表时间：
1984-01-01
期刊：
影响因子：
2.8
通讯作者：
ESPERSEN, JO
中科院分区：
文献类型：
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作者：
PETERSEN, OF;ESPERSEN, JO
体积求和法（V = T（A1 + A2. An））用于测量硬膜外血肿的大小。在6个不同的人工硅胶血肿上测试了准确度，平均差为-2.7 ml，SD [标准差]为3.7 ml。在临床血肿的CT [计算机断层扫描]扫描上测试再现性，SD为2.1 ml。然后，用于体积估计的经验公式发现，0.5 ×高度×长度×深度是中等可靠的，而中线移位和无血管间隙是尺寸的不良指标。因此，手动勾画的体积总和被认为是高度准确的，但必须考虑CT平滑、频谱偏移伪影、部分体积效应和血肿与其他结构分离的问题。
The method of volume summation (V = T(A1 + A2 ... An)) was used to measure the size of extradural hematomas. The accuracy was tested on 6 different artificial silicone hematomas and the mean difference was -2.7 ml, SD [standard deviation] 3.7 ml. The reproducibility was tested on CT [computed tomography] scans of clinical hematomas, SD was 2.1 ml. An empirical formula for volume estimation then found that 0.5 .times. height .times. length .times. depth was moderately reliable, while midline shift and vesselfree space were poor indicators of size. Thus, the volume summation with manual outlining was found to be highly accurate, but the problems of CT smoothing, spectral shift artifact, partial volume effect and separation of the hematoma from other structures must be considered.