BioImaging Bone Fide Spine Phantom BFP BioImaging Technologies

이론적 배경 Bio-Imaging Bone Fide Spine Phantom (BFP) Bio-Imaging Technologies Inc. Newtown PA, USA The GE Lunar Aluminum Spine Phantom (ASP) GE Lunar, Madison, WI, USA 범용성(Study용) 장비회사(장비전용) The European Spine Phantom (ESP) QRM, Dorfstrasse 4, D-91096 Mohrendorf, Germany Hologic Anthropomorphic Spine Phantom Hologic Inc. Waltham MA, USA

실험대상 • 측정장비 • GE Lunar Prodigy Advance(Encore. 11. 40) • 골조직 등가물질(Phantom) • GE Aluminum Spine Phantom (ASP) • Hologic Spine Phantom (HSP) • European Spine Phantom (ESP) Hologic Anthropomorphic Spine Phantom The GE Lunar Aluminum Spine Phantom (ASP) The European Spine Phantom (ESP)

실험방법 • 실험 절차 – Phantom 정밀도 측정(Baseline BMD) • ASP, HSP, ESP를 reposition 없이 20회 측정 – Mean, SD, CV(%) ESP

실험결과 • Phantom 정밀도 (Baseline BMD) (단위: g/cm 2) 　 BMD±SD BMC±SD %Fat±SD ASP (%CV) 1. 178± 0. 002 (0. 17) 61. 04± 0. 12 (0. 19) 7. 9± 0. 12 (1. 48) HSP (%CV) 1. 011± 0. 005 (0. 45) 26. 33± 0. 12 (0. 45) 76. 0± 0. 12 (0. 16) 1. 157± 0. 011 (0. 95) 33. 16± 0. 16 (0. 47) 9. 0± 0. 13 (1. 42) ESP (%CV)

실험결과 • ASP BMD(g/cm 2) 1. 200 1. 195 1. 190 1. 185 1. 180 1. 175 1. 170 1. 165 1. 160 두께(cm) 1. 155 1. 150 1 3 Base 4 Line 5 2 6 ASP 7 8 Linear(ASP) 9 10 11 12 표 1. 두께에 따른 골밀도 변화의 상관분석 ASP HSP ESP 　 r Pearson Correlation . 926** . 899** -. 733** (**p < 0. 01) 13

실험결과 • HSP BMD(g/cm 2) 1. 1 1. 08 1. 06 1. 04 1. 02 1 0. 98 0. 96 두께(cm) 1 2 3 Base 4 Line 5 6 HSP 7 8 Linear(HSP) 9 10 11 표 2. 두께에 따른 골밀도 변화의 상관분석 ASP HSP ESP 　 r Pearson Correlation . 926** . 899** -. 733** (**p < 0. 01) 12 13

실험결과 • ESP BMD(g/cm 2) 1. 18 1. 16 1. 14 1. 12 1. 1 1. 08 두께(cm) 1. 06 1 2 3 Base Line 4 5 6 ESP 7 8 Linear(ESP) 9 10 11 표 3. 두께에 따른 골밀도 변화의 상관분석 ASP HSP ESP 　 r Pearson Correlation . 926** . 899** -. 733** (**p < 0. 01) 12 13

실험결과 • 두께변화에 따른 BMD 값의 변화 　 BMD±SD BMC±SD %Fat±SD ASP (%CV) 1. 182± 0. 008 (0. 65) 61. 21± 0. 36 (0. 59) 7. 0± 0. 24 (3. 52) HSP (%CV) 1. 046± 0. 023 (2. 24) 27. 26± 0. 61 (2. 24) 75. 2± 0. 36 (0. 48) ESP (%CV) 1. 110± 0. 009 (0. 79) 31. 04± 0. 87 (2. 81) 15. 7± 2. 51 (15. 97)

실험결과 • Mode 변경에 따른 정밀도 평가 – ASP 　 1 2 3 4 5 6 7 8 9 • • • 20 Standard mode Thick mode BMD(g/cm 2) 1. 189 1. 183 1. 197 1. 198 1. 188 1. 194 1. 188 1. 186 • • • 1. 194 1. 175 1. 179 1. 18 1. 178 1. 181 1. 178 1. 179 1. 176 • • • 1. 178 Base Line Standard Mode Thick Mode