Noninvasive estimation of heart organ mass by postmortem magnetic resonance imaging and computed tomography compared to conventional autopsy in fetuses: a pilot study

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Forensic Imaging Pub Date : 2023-12-29 DOI:10.1016/j.fri.2023.200575
Chelsea Ward , Allison Chang , Kevin H. Lim , Kathleen A. Brown , Sarah E. Miller , Joseph Connor , Philip S. Lim
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Abstract

Objectives

The purpose of this pilot study is to investigate the accuracy of mass estimation of the heart using postmortem MRI and CT in this population.

Methods

The mass of the heart was estimated using three different methods: sequential segmentation of the right and left ventricles by MRI in 30 patients; sequential segmentation of the left ventricle chamber using CT and an ellipsoid method of the left ventricle (LV) using CT in 6 patients. The estimated mass by each method was compared to conventional autopsy mass using linear regression.

Results

The correlation between estimated and measured cardiac mass using postmortem MRI measurements of the right and left ventricles, CT derived volumes of the left ventricle, or by the LV ellipsoid CT method are as follows: y = 0.87744x - 0.74813 (R2 = 0.958); y = 0.6004x - 2.16 (R2 = 0.8681); y = 0.6019 - 2.1615 (R2 = 0.8599), respectively. When separating the fetuses evaluated by pmMRI into a ≤20 weeks subset or >20 weeks subset, the correlation are as follows: y = 0.5176x + 0.2428 (R2 = 0.645) and y = 0.91237x - 1.53647 (R2 = 0.9475), respectively.

Conclusion

Mass of the heart at autopsy modestly correlates with MRI derived volumes measuring the right and left ventricles. The small sample in the CT derived volume of the left ventricle alone or by the simplified estimated method using the ellipsoid measurements of the left ventricle by CT compared to autopsy weights make it difficult to conclude CT's utility using these methods.

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通过死后磁共振成像和计算机断层扫描无创估测胎儿心脏器官质量与传统尸检方法的比较:一项试点研究
方法采用三种不同的方法估算心脏质量:30 例患者采用 MRI 对左右心室进行顺序分割;6 例患者采用 CT 对左心室腔进行顺序分割,并采用 CT 对左心室 (LV) 进行椭圆形分割。结果使用尸检核磁共振测量左右心室、CT 导出左心室容积或 LV 椭圆体 CT 方法估计和测量的心脏质量之间的相关性如下:y = 0.87744x-0.74813(R2=0.958);y=0.6004x-2.16(R2=0.8681);y=0.6019-2.1615(R2=0.8599)。将 pmMRI 评估的胎儿分为≤20 周子集或>20 周子集时,相关性分别为:y = 0.5176x + 0.2428(R2 = 0.645)和 y = 0.91237x - 1.53647(R2 = 0.9475)。与尸检时的重量相比,CT 单独得出的左心室容积或使用 CT 测量左心室椭圆体的简化估算方法得出的左心室容积样本较小,因此很难用这些方法得出 CT 有用性的结论。
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来源期刊
Forensic Imaging
Forensic Imaging RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
2.20
自引率
27.30%
发文量
39
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