原名「台灣學術線上」
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項次 書目
1
題名:Reconstructed Volume Loss on Cone-beam Computed Tomography Images of Moving Targets     (12點)
著者:Hsiao-Ling ChaoWei-Li ChenChih-Chung HuJian-Kuen WuJason Chia-Hsien Cheng
出版地區:台灣
出版城市:台南市
學科:醫學綜合
關鍵字:Fan-beam computed tomography FBCT ; Cone-beam computed tomography CBCT ; Volume ; Moving ; Phantom
刊名:Journal of Medical and Biological Engineering
卷期:28卷4期(2008.12)
頁碼:223-228
語言:英語
摘要: 英文摘要PDF

The accurate volumetric estimation of structures during organ motion forms the prerequisite basis of using cone-beam computed tomography (CBCT) images for future re-planning purposes. This study evaluated the difference in the reconstructed volume of moving phantoms between cone-beam computed tomography (CBCT) on linear accelerator and fan-beam CT (FBCT) from simulator, under different moving frequencies and amplitudes. Phantom images were separately acquired by FBCT and CBCT. Three acrylic ball phantoms with diameters of 5.1 cm, 9.9 cm, and 12.2 cm, respectively, were used for static and moving experiments. CBCT and FBCT images were imported to a treatment planning system to compare the reconstructed volumes. The imaging adjustment program of CBCT was done to modify CT numbers by transforming the functions to relative electron density. To simulate respiratory movement, the phantoms were moved longitudinally with amplitudes of 12.5, 15, and 17.5 mm, and frequencies of 8, 10, and 12 oscillations per minute, respectively. With auto-contouring technique and imaging adjustment program, the differences in reconstructed volume of 3 static phantoms (small, medium, large) between FBCT and CBCT were -6.20%, -2.47%, and -2.19%, respectively. The average volume losses of different-sized moving phantoms were significantly different, at 56.6±7.5%, 29.0±3.7%, 19.3±2.5%, respectively (all p<0.05). With large phantom, the average volume losses under different frequencies significantly increased as the amplitude became larger, with 16.5±0.8% for 12.5 mm, 19.4±0.7% for 15 mm, and 22.1±0.6% for 17.5 mm (all p<0.05). in contrast, the average volume losses did not differ between the 3 frequencies, with 19.7±2.7%, 19.8±2.9%, and 18.5±2.9%, respectively (all p>0.05). The similar significant impact of amplitude but not frequency on volume loss was also shown in medium and small phantoms. Moving phantoms were associated with the reconstructed volume losses on CBCT, with more losses for the


    

本卷期目次
Journal of Medical and Biological Engineering 28卷4期 (2008.12)
A Preliminary Attempt to Understand Compatibility of Photoplethysmographic Pulse Rate Variability with Electrocardiogramic Heart Rate Variability/ Ping ShiSi-Jung HuYi-Sheng Zhu
Evaluation of Ultra-thin Acid-etched Titanium Foils as Guided Tissue Regeneration Membrane/ Bai-Shuan LiuTsung-bin HuangChen-Jung ChangAn-Yu Tai
In Vitro Estimation of Glenohumeral Joint Center of Rotation/ Jia-Hao ChangAr-Tyan HsuGuan-Liang Chang
Noise Effect on the Performance of Nakagami Image in Ultrasound Tissue Characterization
An in-vitro Experiment on Lysing Adipose Tissue by Shock Waves/ Shen-Min LiangChun-Neng YehJing-Jou YanLong-Ray WanJing-Wei Lee
A Modified Geometric-based Active Contour Model for Lung Segmentation in Magnetic Resonance Images/ Alireza OsarehBita Shadgar
Reconstructed Volume Loss on Cone-beam Computed Tomography Images of Moving Targets/ Hsiao-Ling ChaoWei-Li ChenChih-Chung HuJian-Kuen WuJason Chia-Hsien Cheng
Heart Rate Extraction from Photoplethysmogram Waveform Using Wavelet Multi-resolution Analysis/ Tsu-Hsun FuShing-Hong LiuKuo-Tai Tang
 
   
 
   

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