MPPD: A User-Friendly Posture Deformation Program for Mesh-Type Computational Phantoms

Author:

Han Haegin1,Kim Jaehyo2,Moon Sungho2,Son Gahee2,Shin Bangho2,Kim Hyeonil2,Kim Suhyeon2,Choi Chansoo3,Kim Chan Hyeong2

Affiliation:

1. Division of Cancer Epidemiology & Genetics, National Cancer Institute, National Institute of Health, 9609, Medical Center Drive, Rockville, MD, 20850

2. Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea

3. J Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611.

Abstract

Abstract Recently, the International Commission on Radiological Protection (ICRP) released adult Mesh-type Reference Computational Phantoms (MRCPs), which have great advantage in high deformability. Previous studies have exploited their high deformability to investigate the dosimetric influence of varying statures and postures, demonstrating significant variations in radiation doses. However, the previous studies are constrained by their inability to consider both stature and posture concurrently and by the limited range of postures analyzed. In the present study, a computer program named MPPD (Mesh-type Phantom Posture Deformer) was developed, a user-friendly graphical user interface that enables users to adjust the posture of adult MRCPs and corresponding library phantoms. The MPPD program was applied to deform five adult male phantoms of different statures into sitting and kneeling postures, showcasing its rapid computational speed and minimal RAM usage. The effectiveness of the MPPD program for dose calculation was also investigated by computing the detriment-weighted doses for MPPD-deformed adult male MRCPs, which showed good agreement with dose values for existing posture-deformed phantoms of the previous study. Furthermore, as an application of the MPPD program, the combined dosimetric impact of stature and posture was investigated, which is the inaugural effort to estimate doses by considering these factors concurrently. The result showed that the impact of stature and posture on radiation doses could largely vary depending on the radiation source, highlighting the importance of simultaneous consideration of stature and posture for accurate dose estimation.

Publisher

Ovid Technologies (Wolters Kluwer Health)

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