A simple method for the automatic classification of body parts and detection of implanted metal using postmortem compute
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A simple method for the automatic classification of body parts and detection of implanted metal using postmortem computed tomography scout view Yuya Wada1 · Junji Morishita2 · Yongsu Yoon2 · Miki Okumura1 · Noriaki Ikeda1 Received: 28 April 2020 / Revised: 13 August 2020 / Accepted: 14 August 2020 © Japanese Society of Radiological Technology and Japan Society of Medical Physics 2020
Abstract Information on medical devices embedded in the body is important in the identification of an unidentified body. Computed tomography (CT) is a powerful imaging modality; however, metallic artifacts deteriorate the image quality because of the reconstruction method. On the contrary, CT scout view is less affected by metallic artifacts compared to CT. It is a simple method to classify the body into three rough parts for postmortem CT (PMCT) scout view, and an algorithm used to detect the location of the implanted metal has been developed for personal identification in forensic pathology. Of the test images, 97% were correctly classified into the three body parts. The true-positive rate for detection of the implanted metal in the scout view was 96.5%. Therefore, our simple methods are applicable in PMCT scout views and would be particularly useful for forensic pathology. Keywords Autopsy imaging · Forensic pathology · Personal classification · Personal identification · Scout view · Implanted metal
1 Introduction Based on the results of “The Program on Promotion of Policy about Death Investigation,” created by the Japanese government in June 2014, “The Act of Promotion of Policy about Death Investigation” has been legislated and enforced since April 2020. An important goal of this program is to utilize the scientific methods for investigating the cause of death and preparing a database for personal identification of corpses [1, 2]. O’Donnell et al. have suggested the usefulness of postmortem computed tomography (PMCT) and magnetic resonance imaging for personal identification [3], and another previous study has reported that whole-body computed tomography (CT) images of victims were effective in rapid personal identification of the victims during a
* Yongsu Yoon [email protected]‑u.ac.jp 1
Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812‑8582, Japan
Department of Forensic Pathology and Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka 812‑8582, Japan
2
massive fire in Australia in 2009 [4]. Additionally, Matsunobu et al. have investigated the feasibility of the personal identification method using the image-matching technique based on antemortem CT and PMCT images [5]. Checking the belongings and physical indications played an important role in the personal identification of the victims of the tsunami caused by the Great East Japan earthquake in 2011. Furthermore, the autopsy of victims of mass casualty disasters needs to be conducted as soon as possible because of rigor mortis [6]. The Interpol has set guidelines for disaster victim identification (D
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