THE USE OF MAGNETIC-RESONANCE IMAGING FOR MEASURING SEGMENT INERTIAL PROPERTIES
THE USE OF MAGNETIC-RESONANCE IMAGING FOR MEASURING SEGMENT INERTIAL PROPERTIES
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DOI：
10.1016/0021-9290(89)90051-1
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发表时间：
1989-01-01
影响因子：
2.4
通讯作者：
LONGHILL, JM
中科院分区：
文献类型：
--
作者：
MARTIN, PE;MUNGIOLE, M;LONGHILL, JM
这项研究的目的是确定是否可以通过使用磁共振成像(MRI)的一系列横断面组织扫描来产生节段惯性特性的有效测量。对八个狒狒身体节段(四个前臂、两个上臂和两个小腿)的横断面图像进行数字化，以产生肌肉、骨骼和脂肪组织的区域。这些数据与组织密度值一起用于计算节段体积(V)、密度(D)、质量(M)、质心位置(CM)和绕通过节段质心的横轴的转动惯量(ICM)。这些性能的标准测量是使用标准的实验技术获得的。平均节段CM的标准值与核磁共振值之间有很好的一致性(分别为44.67%对43.36%)，而平均节段D的值相同(1.124 g.cNTDot)。Cm-3)。核磁共振检查倾向于高估V节段(595.3对633.4厘米~3)、M节段(720.0对769.9克)和颈内动脉(3.208对3.332次)。10-3公斤.cntdo.M2)。结论：MRI是一种有效测量节段惯性特征和其他解剖特征的有效方法。
The purpose of the study was to determine whether valid measures of segment inertial properties can be generated from a series of cross-sectional tissue scans using magnetic resonance imaging (MRI). The cross-sectional images for eight baboon cadaver segments (four forearms, two upper arms, and two lower legs) were digitized to yield areas of muscle, bone, and fat tissues. The data, along with tissue density values, were used for calculations of segment volume (V), density(D), mass (M), center of mass location (CM), and moment of inertia (Icm) about a transverse axis through the segment center of mass. Criterion measures of these properties were obtained using standard experimental techniques. Close agreement was found between criterion and MRI values for mean segment CM (44.67 vs. 43.36% from proximal end, respectively) while mean segment D was the same (1.124 g .cntdot. cm-3) for both methods. MRI procedures tended to overestimate segment V (595.3 vs. 633.4 cm3), M(720.0 vs. 769.9 g), and Icm(3.208 vs. 3.332 .times. 10-3 kg .cntdot. m2). It was concluded that MRI represents a promising technique for generating valid measures of segment inertial characteristics as well as other anatomical features.