Forensic Imaging最新文献_第2页

Feasibility of new thresholds for coronary artery calcium score using low-tube voltage protocols in postmortem computed tomography1 死后计算机断层扫描中使用低管电压协议进行冠状动脉钙化评分的新阈值的可行性1

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-11-09 DOI: 10.1016/j.fri.2024.200615

Kyoung Eun Cheon , Se-min Oh , Sung Wook Choi , Man-Seok Han , Jang Gyu Cha , Heon Lee , Minju Lee , Sookyoung Lee

Objective

To validate whether low tube voltage scans of 100 kilovolt-peak (kVp) and 80 kVp for measuring coronary artery calcium score (CACS) using computed tomography (CT) yield comparable results to the standard protocol of 120 kVp using postmortem CT (PMCT).

Materials and Methods

We obtained scans for cadavers where CAC was observed on PMCT scans. In addition to the standard protocol, tube voltage scans were also obtained under conditions of 100 kVp and 80 kVp. We obtained a newly adapted threshold under low tube voltage and compared them with the standard protocol.

Results

The CACS was 851±1421 (p=0.99) and 861±1433 (p=0.99) for the 120-kVp and 100-kVp scans, respectively, and 845±1390 (p=0.99) for the 80-kVp scan using the newly adapted threshold. The 120-kVp and 100-kVp scans demonstrated an almost perfect correlation (r=0.99996, p<0.0001). In the Bland–Altman analysis, the 9 5% limits of agreement ranged from -44 to 25. Similarly, the CACS obtained using the adapted threshold for the 80-kVp scan also demonstrated an excellent correlation with the standard 120-kVp scan (r=0.99993, p<0.0001). In the Bland–Altman analysis, the 95 % limits of agreement ranged from -62 to 75. The effective radiation dose was 2.21±0.064 mSv (p<0.0001) for the 120-kVp scan, 1.35±0.070 mSv (p<0.0001) for the 100-kVp scan, and 0.72±0.48 mSv (p<0.0001) for the 80-kVp scan.

Conclusion

This study suggests that PMCT can be used to measure CACS at low tube voltages and that significant dose reductions in patients can be expected in clinical practice.

目的验证使用计算机断层扫描（CT）测量冠状动脉钙化评分（CACS）时，100 千伏-峰值（kVp）和 80 千伏-峰值（kVp）的低管电压扫描结果是否与使用尸检 CT（PMCT）测量 120 千伏-峰值（kVp）的标准方案结果相当。除标准方案外，我们还在 100 kVp 和 80 kVp 的条件下进行了管电压扫描。结果120 kVp和100 kVp扫描的CACS分别为851±1421（P=0.99）和861±1433（P=0.99），使用新调整的阈值进行80 kVp扫描的CACS为845±1390（P=0.99）。120-kVp 和 100-kVp 扫描显示出几乎完美的相关性（r=0.99996，p<0.0001）。在 Bland-Altman 分析中，9.5% 的一致性范围在-44 到 25 之间。同样，使用 80 kVp 扫描的适应阈值获得的 CACS 与标准 120 kVp 扫描也显示出极好的相关性（r=0.99993，p<0.0001）。在 Bland-Altman 分析中，95 % 的一致性范围为 -62 至 75。120 kVp 扫描的有效辐射剂量为 2.21±0.064 mSv（p<0.0001），100 kVp 扫描的有效辐射剂量为 1.35±0.070 mSv（p<0.0001），80 kVp 扫描的有效辐射剂量为 0.72±0.48 mSv（p<0.0001）。

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引用次数: 0

Effects of carbonization on gunshot residue detection in an animal model 碳化对动物模型枪弹残留物检测的影响

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-11-04 DOI: 10.1016/j.fri.2024.200612

Charbel El Khoury Moussa , Bruno Payré , Sébastien Aries , Stéphane Grill , Sarah Galland , Lise Pestourie , Fabrice Dedouit , Norbert Telmon , Fréderic Savall , Céline Guilbeau-Frugier

The detection of gunshot residue (GSR) can be useful to determine if the wound has been caused by a firearm and it could help to differentiate the entry wound from the exit one. Carbonization is a good method for altering crime scenes. However, there are few studies in this specific context. The first objective of our study was to examine the persistence of GSR in wounds after carbonization. The second aim was to differentiate entry wounds from exit ones.

For the experiment, bullets were fired with a 22LR on sheep limbs at contact range.

The specimens were divided into four groups: two that weren't shot at (fresh and carbonized limbs) and two of shot limbs (one with carbonization and one without). Carbonization was performed in the open air using an accelerant.

Wounds were analyzed using Scanning Electron Microscopy with Energy Dispersive X-ray spectrometry (SEM–EDX) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS).

Lead, Antimony and Barium were observed using SEM-EDX only in the entry wounds, while lead was found in the exit ones. ICP-MS enabled the detection of these elements in the entry and exit wounds but predominantly in the entry ones. After carbonization we observed a huge decrease of GSR. With SEM-EDX most of the particles detected were only consistent with GSR. Anyway, the identification of GSR and the differentiation between entry and exit wounds were still possible with both techniques. Therefore, they are suitable for detecting GSR in carbonized gunshot wounds under the specific conditions of our experiment.

检测枪击残留物（GSR）有助于确定伤口是否由枪支造成，也有助于区分入口伤口和出口伤口。碳化是改变犯罪现场的一种好方法。然而，针对这一特定情况的研究却很少。我们研究的第一个目的是检查碳化后伤口中 GSR 的持久性。在实验中，用 22LR 子弹在接触范围内射击绵羊肢体。标本被分为四组：两组未中弹（新鲜肢体和碳化肢体），两组中弹肢体（一组碳化，一组未碳化）。使用扫描电子显微镜与能量色散 X 射线光谱法（SEM-EDX）和电感耦合等离子体质谱法（ICP-MS）对伤口进行了分析。使用扫描电子显微镜与能量色散 X 射线光谱法（SEM-EDX）仅在入口伤口中观察到铅、锑和钡，而在出口伤口中发现了铅。ICP-MS 能够在入口和出口伤口中检测到这些元素，但主要是在入口伤口中。碳化后，我们观察到 GSR 大幅下降。通过 SEM-EDX 检测到的大部分颗粒与 GSR 一致。无论如何，这两种技术仍然可以识别 GSR 并区分入口和出口伤口。因此，在我们实验的特定条件下，这两种技术都适用于检测碳化枪伤中的 GSR。

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引用次数: 0

Decreased hepatic CT value on immediate postmortem CT after CPR: Comparison with antemortem CT and correlation with liver enzymes changes 心肺复苏术后立即尸检的肝脏 CT 值下降：与死前CT的比较以及与肝酶变化的相关性

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-10-22 DOI: 10.1016/j.fri.2024.200609

Tomoaki Hagita , Seiji Shiotani , Kento Inoue , Yukio Kosako , Yasuji Matsuno

Purpose We compared hepatic antemortem CT (AMCT) and postmortem CT (PMCT) values obtained in the same subjects. The correlations between the changes in hepatic CT values and changes in aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH) values were also investigated.

Materials and methods Fifty subjects (20 males, 30 females; mean age: 85.9 ± 7.9 years; range: 67–100 years) who were transported to the emergency room in cardiopulmonary arrest (CPA) and underwent PMCT immediately after unsuccessful cardiopulmonary resuscitation (CPR) comprised the study population. The hepatic AMCT and PMCT values were both measured, and the differences between the two were calculated. The differences between AST, ALT, and LDH values at CPR and antemortem were also calculated. The correlations between the hepatic CT value differences and AST, ALT, and LDH value differences also were assessed.

Results The hepatic AMCT and PMCT values of 61.7 ± 6.8 Hounsfield Unit (HU) and 46.2 ± 8.2 HU, respectively, were significantly different. The AST, ALT, and LDH values were significantly higher at CPR than at antemortem. The differences in the hepatic CT values and in the AST, ALT, and LDH values were moderately correlated.

Conclusion The hepatic values were significantly lower on PMCT than on AMCT. The changes in hepatic CT values correlated with the changes in the liver deviation enzyme values. These results indicate the possibility that ischemic, hypoxic injury, and anerobic glycolysis of the liver at CPR after CPA are the cause of decreased hepatic PMCT values.

目的我们比较了同一受试者的肝脏死前 CT（AMCT）和死后 CT（PMCT）值。材料和方法 50 名受试者（男性 20 人，女性 30 人；平均年龄：85.心肺复苏（CPR）失败后立即接受 PMCT。研究人员同时测量了肝脏 AMCT 和 PMCT 值，并计算了两者之间的差异。还计算了心肺复苏时和死前的 AST、ALT 和 LDH 值之间的差异。结果肝脏 AMCT 值为 61.7 ± 6.8 Hounsfield Unit (HU)，PMCT 值为 46.2 ± 8.2 HU，两者差异显著。心肺复苏时的 AST、ALT 和 LDH 值明显高于死前。结论 PMCT 的肝功能值明显低于 AMCT。肝 CT 值的变化与肝偏差酶值的变化相关。这些结果表明，CPA 后心肺复苏时肝脏缺血、缺氧损伤和无氧糖酵解可能是导致肝脏 PMCT 值下降的原因。

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引用次数: 0

Predictive value of coronary artery calcium score on radiological and autoptic findings in cases of sudden death 冠状动脉钙化评分对猝死病例放射学和自体检查结果的预测价值

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-10-22 DOI: 10.1016/j.fri.2024.200610

Jessika Camatti , Anna Laura Santunione , Stefano Draisci , Drago Antonella , Maria Grazia Amorico , Guido Ligabue , Enrico Silingardi , Pietro Torricelli , Rossana Cecchi

Calcium Artery Coronary Score (CACS) is a noninvasive examination of the coronary arteries in which the amount of calcium is calculated using cardiac Computed Tomography. The role of postmortem imaging in sudden death has been the subject of increasing interest in recent years, and previous studies have proposed a possible correlation between CACS and autopsy findings.

The present study aims to establish a correlation between CACS, the presence of coronary artery opacification defects on Multi-Phase Post-Mortem Computed Tomography Angiography (MPMCTA), and the presence of coronary stenosis at autopsy, in order to verify whether CACS confirms its predictive value in terms of cardiac risk and can guide the decision to perform or not to perform MPMCTA.

A cohort of 24 subjects who died suddenly was examined. Firstly, MPMCTA was performed, then autopsy was carried out. CACS was calculated, the detection of opacification defects on MPMCTA was investigated and the presence of coronary stenoses on autopsy was described.

24 deceased individuals (53 years ± 11.7; 20 men) were evaluated. CACS has a positive predictive value of 0.78 and a negative predictive value of 0.73 in assessing the presence of radiological coronary artery opacification defects. The positive predictive value on stenosis relief is 0.88, while the negative predictive value on the same relief is 0.73.

CACS is an appropriate additional tool in the evaluation of sudden death cases. Our results provided an encouraging contribution to the systematic application of CACS in cases of sudden death.

冠状动脉钙化评分（CACS）是通过心脏计算机断层扫描计算冠状动脉钙化量的一种无创检查。近年来，尸检成像在猝死中的作用越来越受到关注，之前的研究提出了 CACS 与尸检结果之间可能存在的相关性。本研究旨在建立CACS、多相死后计算机断层扫描血管成像（MPMCTA）中出现的冠状动脉不透明缺陷与尸检时出现的冠状动脉狭窄之间的相关性，以验证CACS是否证实了其在心脏风险方面的预测价值，并能指导是否进行MPMCTA的决定。首先进行 MPMCTA，然后进行尸检。对 24 名死者（53 岁 ± 11.7；20 名男性）进行了评估。在评估是否存在放射学冠状动脉不透明缺陷方面，CACS 的阳性预测值为 0.78，阴性预测值为 0.73。在评估猝死病例时，CACS 是一个合适的补充工具。我们的研究结果为在猝死病例中系统应用 CACS 做出了令人鼓舞的贡献。

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引用次数: 0

Radiologic imaging properties of various gemstones 各种宝石的放射成像特性

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-10-21 DOI: 10.1016/j.fri.2024.200607

Angi M. Christensen , Ian S. Saginor , Mary R. Mani , Thomas D. Ruder , Jodi B. Webb

Differences in the radiologic appearance of diamonds compared to other gemstones such as cubic zirconia have been noted, but the radiological imaging properties of many gemstones have never been systematically examined. Here, the radiologic imaging properties of a variety of gemstones are assessed using digital radiology (DR) and computed tomography (CT). Radiodensity was assessed by calculating greyscale values (GV) from DR images with standardized acquisition parameters. Results show that gemstones with higher densities are more radiodense. Diamonds were found to be the least radiodense, while many common diamond simulants were found to be the most radiodense. Especially when superimposed with anatomical structures, diamonds are very difficult to detect using radiology. CT imaging, however, can improve differentiation between diamonds and surrounding tissues, possibly making it useful for detecting diamonds concealed on/in a person, and was also useful for identifying irregularities in gemstone surfaces such as chips, divots, and natural surfaces.

钻石与立方氧化锆等其他宝石在放射学外观上的差异已被注意到，但许多宝石的放射学成像特性却从未被系统地研究过。在此，我们使用数字放射学（DR）和计算机断层扫描（CT）评估了各种宝石的放射成像特性。通过从具有标准化采集参数的 DR 图像中计算灰度值 (GV) 来评估放射密度。结果显示，密度越高的宝石放射性越强。钻石的放射性密度最低，而许多常见的钻石模拟物的放射性密度最高。特别是当钻石与解剖结构叠加时，很难通过放射学检测出来。然而，CT 成像可改善钻石和周围组织之间的区别，可能使其有助于检测隐藏在人体内的钻石，也有助于识别宝石表面的不规则之处，如碎屑、凹痕和天然表面。

引用次数: 0

Neural radiance fields as a complementary method to photogrammetry for forensic 3D documentation: Initial comparative insights 神经辐射场作为摄影测量法的补充方法，用于法医三维记录：初步比较见解

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-10-21 DOI: 10.1016/j.fri.2024.200605

Haruki Fukuda , Summer J. Decker , Jonathan M. Ford , Wolf Schweitzer , Lars C. Ebert

Objectives

Photogrammetry is widely used in forensic practice to create 3D models of crime scenes, bodies, living individuals, and objects. However, it has limitations in accurately capturing transparent, reflective, and low-texture surfaces, which can hinder forensic investigations. Neural Radiance Fields (NeRFs), a recently developed method, offer a potential solution by creating more accurate and detailed 3D models in these challenging contexts. This study aims to evaluate whether NeRFs can serve as effective alternatives to structure-from-motion (SfM) photogrammetry for recording forensic autopsies.

Materials and Methods

Photogrammetric scans were performed on a variety of forensic subjects, including a cadaver with skin discoloration and epidermal exfoliation, a metal trashcan, a vehicle, and a mock crime scene. The scans were processed using traditional photogrammetry software (Meshroom) and compared with NeRF-based visualizations generate using instant neural graphics primitives.

Results

NeRF-based models provided more lifelike and detailed visualizations than photogrammetry, particularly when documenting transparent, reflective, or featureless surfaces. NeRF demonstrated superior capability in capturing complex details that photogrammetry struggled with.

Conclusion

NeRF technology shows considerable promise for improving the documentation of forensic autopsies, offering enhanced visual fidelity for challenging surfaces such as transparent or reflective materials. While the method presents challenges related to editing, software compatibility, and high computational demands, its potential benefits in forensic investigations are evident and merit further exploration.

目标摄影测量在法医实践中被广泛用于创建犯罪现场、尸体、活人和物体的三维模型。然而，它在准确捕捉透明、反光和低纹理表面方面存在局限性，这可能会妨碍法医调查。神经辐射场（NeRFs）是最近开发的一种方法，可在这些具有挑战性的环境中创建更精确、更详细的三维模型，从而提供一种潜在的解决方案。本研究旨在评估 NeRF 是否能有效替代结构运动（SfM）摄影测量法，用于记录法医尸检。材料与方法对各种法医对象进行了摄影测量扫描，包括一具皮肤变色和表皮脱落的尸体、一个金属垃圾桶、一辆汽车和一个模拟犯罪现场。扫描结果使用传统摄影测量软件（Meshroom）进行处理，并与使用即时神经图形基元生成的基于 NeRF 的可视化结果进行比较。NeRF 在捕捉摄影测量难以捕捉的复杂细节方面表现出了卓越的能力。结论NeRF 技术在改进法医尸检记录方面前景广阔，可为透明或反光材料等具有挑战性的表面提供更高的视觉保真度。虽然该方法在编辑、软件兼容性和高计算要求方面存在挑战，但其在法医调查中的潜在优势显而易见，值得进一步探索。

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引用次数: 0

Cranial fluctuating asymmetry and schizophrenia in a contemporary Danish population 颅骨波动不对称与当代丹麦人群中的精神分裂症

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-10-18 DOI: 10.1016/j.fri.2024.200606

Trine Bottos Olsen, Jytte Banner, Chiara Villa

Post-mortem Computed Tomography (PMCT) scans in forensic medicine not only assist with case work but is also a useful data source for other imaging-based research, e.g. morphological studies on bones. PMCT 3D data can be combined with diagnostic information and help to elucidate how disease manifests in the body. For example, the skeleton can be influenced by developmental instability, which may result in a morphological change called fluctuating asymmetry (FA). Developmental instability also influences the risk of developing schizophrenia, which means that individuals with higher levels of developmental instability, and by extension FA, might have a higher risk of developing the disorder. This connection has been investigated in soft tissues but has not yet been investigated in bones. We used PMCT 3D models from a forensic cohort to compare levels of cranial FA between a group of individuals with diagnosed schizophrenia and a control group. Our sample included 48 individuals with diagnosed schizophrenia and 58 controls. We collected 27 landmarks from our 3D models. Levels of fluctuating asymmetry were analysed using Procrustes ANOVA, and the two groups were compared using t-test and Wilcoxon rank sum test. Age and sex were tested as factors using Pearson correlation and two-way ANOVA. We found that there was no statistically significant difference in levels of cranial FA between the schizophrenic group and the control group, and that neither age nor sex was a factor. Our results confirm earlier studies that suggest that the multifactorial aetiology of FA and schizophrenia is difficult to capture comprehensively.

法医学中的死后计算机断层扫描（PMCT）不仅有助于案件工作，也是其他成像研究（如骨骼形态研究）的有用数据源。PMCT 三维数据可与诊断信息相结合，有助于阐明疾病在体内的表现形式。例如，骨骼会受到发育不稳定性的影响，这可能导致一种称为波动不对称（FA）的形态变化。发育不稳定性也会影响患精神分裂症的风险，这意味着发育不稳定性较高的人患精神分裂症的风险可能较高，进而影响到波动不对称。这种联系已在软组织中进行过研究，但尚未在骨骼中进行过研究。我们利用法医队列中的 PMCT 3D 模型，比较了一组确诊精神分裂症患者与对照组之间的颅骨 FA 水平。我们的样本包括 48 名确诊精神分裂症患者和 58 名对照组患者。我们从三维模型中收集了 27 个地标。我们使用 Procrustes 方差分析对波动不对称水平进行了分析，并使用 t 检验和 Wilcoxon 秩和检验对两组进行了比较。使用皮尔逊相关性和双向方差分析检验了年龄和性别因素。我们发现，精神分裂症组和对照组的颅骨FA水平差异无统计学意义，年龄和性别都不是影响因素。我们的研究结果证实了早先的研究，这些研究表明，FA 和精神分裂症的多因素病因难以全面把握。

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引用次数: 0

Comparison of SEM-EDX and ICP-MS for the analysis of gunshot residues after burial: An experimental study 比较 SEM-EDX 和 ICP-MS 对掩埋后枪弹残留物的分析：实验研究

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-08-14 DOI: 10.1016/j.fri.2024.200604

Morgan Nguyen-Hong , Bruno Payré , Sébastien Aries , Fabrice Dedouit , Norbert Telmon , Fréderic Savall , Céline Guilbeau-Frugier

Gunshot residues (GSR) analysis can be valuable in a forensic context for distinguishing entry wounds from exit wounds, especially in cases when body alterations prevent macroscopic analysis. Several studies have demonstrated its usefulness in various contexts. However, few studies have examined the retention of GSR under environmental conditions particularly after burial.

The primary objective of our experimental study is to investigate the retention of GSR after burial and decomposition by using two techniques: SEM-EDX and ICP-MS. Our secondary objective is to determine whether it is still possible to distinguish the entry wounds from the exit ones after 2 months of burial. For this study, we used a bovine model (cow feet), and fired with 7 mm semi-jacketed bullets. We formed several groups, including 3 control groups that hadn't been shot (buried for 2 days and 60 days and one unburied group), 3 test groups that had been shot (one unburied and two buried that were exhumed after 2 days and 60 days of burial).

The results of our study show that both SEM-EDX and ICP-MS were suitable for detecting particles characteristic of GSR, after 60 days of burial. However, only SEM-EDX could differentiate easily the entry wounds from the exit ones.

Our experimental study demonstrates that SEM-EDX analysis is suitable in cases where the discovery of a buried body doesn't allow the macroscopic determination of the ballistic trajectory.

在法医鉴定中，枪弹残留物（GSR）分析对于区分入口伤和出口伤很有价值，尤其是在身体改变无法进行宏观分析的情况下。一些研究已经证明了它在各种情况下的实用性。我们实验研究的主要目的是利用两种技术调查 GSR 在埋葬和分解后的保留情况：我们实验研究的主要目的是利用 SEM-EDX 和 ICP-MS 两种技术研究 GSR 在掩埋和分解后的保留情况。我们的次要目标是确定在掩埋 2 个月后是否仍有可能区分入口伤口和出口伤口。在这项研究中，我们使用了牛模型（牛脚），并使用 7 毫米半套筒子弹进行射击。研究结果表明，SEM-EDX 和 ICP-MS 都适用于检测埋葬 60 天后的 GSR 特征颗粒。我们的实验研究表明，SEM-EDX 分析适用于发现埋葬尸体后无法宏观确定弹道的情况。

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引用次数: 0

Sex estimation from mandibular morphometry using discriminant analysis–CT scan based retrospective study 利用判别分析从下颌骨形态估计性别--基于 CT 扫描的回顾性研究

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-07-05 DOI: 10.1016/j.fri.2024.200603

Vasanth Lenin , Siddhartha Das , Sunitha V․C․ , Sachit Ganapathy , Prachi Parinita Sahoo

It is well known that skeletal characteristics vary among different populations. Sex dimorphic characteristics of the mandible have been reported from studies using either mandible bone or computer tomography (CT) scan images of the mandible to test its efficacy in estimating sex. Mandibular studies for estimating sex in any particular population group may not hold well for different populations owing to inherent geographical variations. With this background, we assessed the validity of mandible measurements from CT scan images to determine sex in the South Indian population. As a part of our study, 11 metric parameters and 1 angular parameter were measured and analyzed. The mean values of all the parameters were significantly higher for males as compared to females. Bigonial breadth indicated the best discriminatory ability of the study. Mandibular angle had the least predictive accuracy among all the discriminant functions studied. We further observed that a combination of parameters gave the best overall classification rate (92.3 %). When the same functions were tested on an independent testing data set, a combination of parameters and bigonial breadth gave the best classification rate (82.1 %) which was consistent. We concluded that the mandible has a high accuracy for sex estimation. All the parameters studied demonstrated statistically significant differences between the two sexes except the mandibular angle.

众所周知，不同人群的骨骼特征各不相同。有研究报告称，下颌骨的性别二形特征是利用下颌骨或下颌骨计算机断层扫描（CT）图像来测试其在估计性别方面的有效性。由于固有的地域差异，用于估计特定人群性别的下颌骨研究可能不适用于不同人群。在此背景下，我们评估了通过 CT 扫描图像测量下颌骨来确定南印度人群性别的有效性。作为研究的一部分，我们测量并分析了 11 个度量参数和 1 个角度参数。男性所有参数的平均值都明显高于女性。大牙面宽显示了该研究的最佳判别能力。在所有研究的判别函数中，下颌角的预测准确性最低。我们进一步观察到，参数组合的总体分类率最高（92.3%）。在一个独立的测试数据集上测试相同的函数时，参数和大颚宽度的组合给出了最佳的分类率（82.1%），这是一致的。我们的结论是，下颌骨在性别估计方面具有很高的准确性。除下颌角外，所研究的所有参数在统计学上都显示出两种性别之间的显著差异。

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引用次数: 0

Asphyxiation due to acute complications of cervical goitre- a rare case with a brief review of literature 宫颈甲状腺肿急性并发症导致的窒息--一例罕见病例及文献综述

IF 0.8 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Forensic Imaging

Pub Date : 2024-06-20 DOI: 10.1016/j.fri.2024.200602

G Gokul , Abilash Srinivasa Murthy , Abhishek Yadav , Sudheer Arava , Sudhir. K. Gupta , Shivangi Dagar

引用次数: 0