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1
題名:The Analysis of Confounding Factors in Volume Reconstruction of 3DCRT with Spiral Mode CT Simulation     (14點)
著者:Jian-Kuen WuChiao-Ling TsaiFeng-Ming HsuChun-Wei WangWen-Yih TsengJason Chia-Hsien ChengGwo-Jen Jan
出版地區:台灣
出版城市:台南市
學科:醫學綜合
關鍵字:Three-dimensional conformal radiotherapy ; Spiral-mode computed tomography ; Volume reconstruction ; Phantom
刊名:Journal of Medical and Biological Engineering
卷期:28卷2期(2008.6)
頁碼:71-77
語言:英語
摘要: 英文摘要PDF

This study analyzed the difference in reconstructing volume by using phantom model between various settings of axial-mode and spiral-mode computed tomography (CT) simulator for three-dimensional conformal radiotherapy. Three phantom balls with different diameters (5.1, 9.9, 12.2 cm) were scanned by a single-row detector CT simulator. The volumes of all phantom balls were reconstructed in the same system. The exactly calculated phantom ball volumes were the baselines as compared to the volumes by the conventional axial-mode CT reconstruction. The reconstructed volumes from the axial scanning mode were compared with the corresponding settings of the spiral scanning mode in CT simulation, with four different Hounsfield (HU) thresholds, three different pitches (1, 1.5 and 2), and four different slice widths (1, 2, 3 and 5 mm). The reconstructed volumes were less than the exactly calculated volumes in all phantom balls using the conventional axial-mode CT simulation. Larger slice width and HU threshold were associated with larger difference between the exactly calculated volumes and reconstructed volumes in axial CT mode. For the small phantom ball at slice width of no more than 3 mm, there were less than 5% of volume losses compared with axial-mode CT settings. The lowest HU threshold and slice width of less than 5 mm were needed to maintain volume loss of less than 5% in medium and large balls. As compared to axial-mode scanning, spiral-mode scanning offered volume reconstruction loss of less than 5% at almost all settings. The exceptions existed in the small phantom ball with slice width of 5 mm, spiral pitch of 1.5 and 2 at 50 HU, and slice width of 5 mm, spiral pitch of 2 at 0 HU. Slice interval, spiral scanning pitch and HU threshold were the factors with impact on the accurate estimation of volume reconstruction by spiral CT simulator. Spiral CT mode was feasible in most scanning settings, with acceptable volume reconstruction accuracy threshold of more than 95%.


    

本卷期目次
Journal of Medical and Biological Engineering 28卷2期 (2008.6)
Measurement of Cerebral Blood Flow and Oxygen Saturation Using Laser Doppler Flowmetry and Near Infrared Spectroscopy in Ischemic Stroke Rats/ LI-FU LIUChih-Kuang YehChih-Hung ChenTak-Wah WongJia-Jin Jason Chen
Effects of Amorphous Calcium Phosphate on Periodontal Ligament Cell Adhesion and Proliferation in vitro/ Wei-Bin SunFei-Min ZhangJiu-Yu GuoJuan WuWen-Lei Wu
Finite Element Analysis of the Effects of Sizes of Acetabular Components on the Initial Stability of the Acetabular Cup/ Jui-Ting HsuMing-Tzu TsaiChih-Han ChangLih-Jyh FuhKuo-An LaiZi-Ling LiuMing-Gene TuHeng-Li Huang
The Constructs of Kinematic Measures for Reaching Performance in Stroke Patients/ Jyh-Jong ChangYu-Sheng YangWen-Lan WuLan-Yuen GuoFong-Chin Su
The Analysis of Confounding Factors in Volume Reconstruction of 3DCRT with Spiral Mode CT Simulation/ Jian-Kuen WuChiao-Ling TsaiFeng-Ming HsuChun-Wei WangWen-Yih TsengJason Chia-Hsien ChengGwo-Jen Jan
A Specialized Robot for Ankle Rehabilitation and Evaluation/ Chou-Ching K. LinMing-Shaung JuShu-Min ChenBo-Wei Pan
Application of Quality Function Deployment in Design of Mobile Assistive Devices/ Kuen-Horng TsaiChun-Yu YehHsin-Chang LoChun-Ting LiChan-Peng ChengGuan-Liang Chang
Leg Crossing Posture on Pulse Transit Time and Heart Rate Variability/ Kang-Ming ChangKeng-Ming Chang
 
   
 
   

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