TY - JOUR
T1 - A simple method for semi-automatic readjustment for positioning in post-mortem head computed tomography imaging
AU - Kawazoe, Yusuke
AU - Morishita, Junji
AU - Matsunobu, Yusuke
AU - Okumura, Miki
AU - Shin, Seitaro
AU - Usumoto, Yosuke
AU - Ikeda, Noriaki
N1 - Funding Information:
The authors thank faculty members of Department of Forensic Pathology and Sciences, Graduate School of Medical Sciences, Kyushu University, Japan and Yongsu Yoon, Ph.D, Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Japan for useful discussions.
Publisher Copyright:
© 2019
PY - 2019/3
Y1 - 2019/3
N2 - The purpose of this study is to evaluate the usefulness of a simple method for readjustment of positioning in post-mortem (PM) head computed tomography (CT) imaging. Two hundred and twenty-five autopsied cases were used to test our proposed method. The coordinates of 5 landmarks on axial planes in PM head CT images were determined manually to calculate Yaw, Pitch, and Roll angles for the sake of readjustment. A radiologist and a forensic pathologist evaluated the readjustment by mutual agreement. Intraclass correlation coefficients (ICCs) for Yaw, Pitch, and Roll angles were measured for 3 operators. Similarity in AM and PM images after the readjustment was tested for 18 cases to evaluate the usefulness of the readjustment in personal identification for forensic cases. If similarity of the same person showed the highest value among all combinations in 18 cases, it was regarded as the correct identification. The processing time of our readjustment was limited to within 2 min per case. The orbitomeatal line (OML) was included in a single axial plane in 96.4% (217/225) of the cases after the readjustment. Reproducibility for determining landmarks showed acceptable ICC. Moreover, rank-one identification rate before and after readjustment were 16.7% (3/18) and 88.9% (16/18), respectively. Thus, our method for semi-automated readjustment exhibited potential usefulness in forensic cases. A simple method for semi-automatic readjustment would be a useful tool for post-mortem CT imaging with high reproducibility and a short processing time.
AB - The purpose of this study is to evaluate the usefulness of a simple method for readjustment of positioning in post-mortem (PM) head computed tomography (CT) imaging. Two hundred and twenty-five autopsied cases were used to test our proposed method. The coordinates of 5 landmarks on axial planes in PM head CT images were determined manually to calculate Yaw, Pitch, and Roll angles for the sake of readjustment. A radiologist and a forensic pathologist evaluated the readjustment by mutual agreement. Intraclass correlation coefficients (ICCs) for Yaw, Pitch, and Roll angles were measured for 3 operators. Similarity in AM and PM images after the readjustment was tested for 18 cases to evaluate the usefulness of the readjustment in personal identification for forensic cases. If similarity of the same person showed the highest value among all combinations in 18 cases, it was regarded as the correct identification. The processing time of our readjustment was limited to within 2 min per case. The orbitomeatal line (OML) was included in a single axial plane in 96.4% (217/225) of the cases after the readjustment. Reproducibility for determining landmarks showed acceptable ICC. Moreover, rank-one identification rate before and after readjustment were 16.7% (3/18) and 88.9% (16/18), respectively. Thus, our method for semi-automated readjustment exhibited potential usefulness in forensic cases. A simple method for semi-automatic readjustment would be a useful tool for post-mortem CT imaging with high reproducibility and a short processing time.
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U2 - 10.1016/j.jofri.2019.01.004
DO - 10.1016/j.jofri.2019.01.004
M3 - Article
AN - SCOPUS:85060595251
SN - 2212-4780
VL - 16
SP - 57
EP - 64
JO - Journal of Forensic Radiology and Imaging
JF - Journal of Forensic Radiology and Imaging
ER -