目的:探讨颞下颌关节(temporom and ibu lar joint,TM J)形态的多排螺旋CT(mu ltislice helical computed tomo-graphy,MSCT)影像测量与解剖测量的相关关系。方法:MSCT对4具成人和4具儿童尸体TM J扫描,经多层面后重建处理,对反映TM J形...目的:探讨颞下颌关节(temporom and ibu lar joint,TM J)形态的多排螺旋CT(mu ltislice helical computed tomo-graphy,MSCT)影像测量与解剖测量的相关关系。方法:MSCT对4具成人和4具儿童尸体TM J扫描,经多层面后重建处理,对反映TM J形态的参数进行测量,并在标本上进行相应部位相应参数测量,两者测量结果进行相关性分析。结果:有关TM J骨性部分的参数两种测量结果间有非常显著的正相关关系,关节盘厚度的测量,两种方法间有较大的正相关关系。结论:可以利用MSCT对TM J形态进行定性和定量研究。展开更多
Background Multislice helical computed tomography (MSCT) has been used to depict coronary anatomy noninvasively, and proved useful for evaluating ventricular function. The aim of our study was to assess the accuracy...Background Multislice helical computed tomography (MSCT) has been used to depict coronary anatomy noninvasively, and proved useful for evaluating ventricular function. The aim of our study was to assess the accuracy of ventricular volume as measured by MSCT.Methods Fourteen human left ventricular (LV) and 15 right ventricular (RV) casts were scanned by MSCT. A series of LV and RV short-axis images were reconstructed later with slice thickness of 2.0 mm, 3.5 mm, 5.0 mm, 7.0 mm, and 10.0 mm. Ventricular volume was calculated by the multislice tomographic Simpson’s method. True LV and RV cast volumes were determined by water displacement. Results Both calculated LV and RV volumes correlated highly with the corresponding true volumes (all r>0.95, P<0.01). But with slice thickness from 2.0 mm to 10.0 mm, MSCT scanning overestimated the corresponding true volume by (3.21±5.95) ml to (12.58±8.56) ml for LV and (10.22±8.45) ml to (23.91±12.24) ml for RV (all P<0.01). There was a very high correlation between the overestimation and the selected slice thickness for both LV and RV volume measurements (r=0.998 and 0.996, P<0.01, respectively). However, when slice thickness was reduced to 5.0 mm, the overestimation for both LV and RV volume measurements became nonsignificant for slice thickness from 2.0 mm to 5.0 mm. Conclusions Both LV and RV volumes can be accurately estimated by MSCT. Thinner slice has more accurate calculated volume. However, 5.0 mm slice thickness is thin enough for an accurate measurement of LV or RV volume.展开更多
文摘目的:探讨颞下颌关节(temporom and ibu lar joint,TM J)形态的多排螺旋CT(mu ltislice helical computed tomo-graphy,MSCT)影像测量与解剖测量的相关关系。方法:MSCT对4具成人和4具儿童尸体TM J扫描,经多层面后重建处理,对反映TM J形态的参数进行测量,并在标本上进行相应部位相应参数测量,两者测量结果进行相关性分析。结果:有关TM J骨性部分的参数两种测量结果间有非常显著的正相关关系,关节盘厚度的测量,两种方法间有较大的正相关关系。结论:可以利用MSCT对TM J形态进行定性和定量研究。
基金This study was supported in partbyagrant from the Doctor Foundation of ScienceandTechnologyBureauofHebeiProvince (No .0 0 5 42 0 0D -15 ) .
文摘Background Multislice helical computed tomography (MSCT) has been used to depict coronary anatomy noninvasively, and proved useful for evaluating ventricular function. The aim of our study was to assess the accuracy of ventricular volume as measured by MSCT.Methods Fourteen human left ventricular (LV) and 15 right ventricular (RV) casts were scanned by MSCT. A series of LV and RV short-axis images were reconstructed later with slice thickness of 2.0 mm, 3.5 mm, 5.0 mm, 7.0 mm, and 10.0 mm. Ventricular volume was calculated by the multislice tomographic Simpson’s method. True LV and RV cast volumes were determined by water displacement. Results Both calculated LV and RV volumes correlated highly with the corresponding true volumes (all r>0.95, P<0.01). But with slice thickness from 2.0 mm to 10.0 mm, MSCT scanning overestimated the corresponding true volume by (3.21±5.95) ml to (12.58±8.56) ml for LV and (10.22±8.45) ml to (23.91±12.24) ml for RV (all P<0.01). There was a very high correlation between the overestimation and the selected slice thickness for both LV and RV volume measurements (r=0.998 and 0.996, P<0.01, respectively). However, when slice thickness was reduced to 5.0 mm, the overestimation for both LV and RV volume measurements became nonsignificant for slice thickness from 2.0 mm to 5.0 mm. Conclusions Both LV and RV volumes can be accurately estimated by MSCT. Thinner slice has more accurate calculated volume. However, 5.0 mm slice thickness is thin enough for an accurate measurement of LV or RV volume.