Suchergebnisse - "ordered subsets expectation maximization (OSEM) algorithm"

Application of ordered-subsets expectation-maximization (OSEM) algorithm to cone-beam SPECT for accelerated 3D reconstruction von Krol, A., Feiglin, D.H., Lee, W., Kunniyur, V.R., Salgado, R.B., Coman, I.L., Lipson, E.D., Karczewski, D.A., Thomas, F.D.

“… We investigated the performance of an ordered-subsets expectation-maximization (OSEM) algorithm for accelerated reconstruction in cone-beam SPECT …”
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Improving the Quality of Brain PET Images Using MR‐Guided PET Reconstruction Technique With Integrated PET/MR von Shao, Hongda, Huang, Gan, Wang, Yue, Zhang, Yan, Xue, Qiaoyi, Hao, Jiaxin, Liu, Jianjun

“… The PET images of a Hoffman phantom were reconstructed using the MRg algorithm and routine Ordered Subsets Expectation Maximization (OSEM) algorithm …”
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Optimal choice of OSEM and SD reconstruction algorithms in CZT SPECT for hypertrophic cardiomyopathy patients von Tsuboi, Kunihito, Nagaki, Akio, Shibutani, Takayuki, Onoguchi, Masahisa

“… The spectrum dynamics (SD) algorithm is a cardiac reconstruction algorithm of D-SPECT, which improves spatial resolution compared with the ordered-subsets expectation maximization (OSEM) algorithm …”
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Total-Body Dynamic Reconstruction and Parametric Imaging on the uEXPLORER von Zhang, Xuezhu, Xie, Zhaoheng, Berg, Eric, Judenhofer, Martin S, Liu, Weiping, Xu, Tianyi, Ding, Yu, Lv, Yang, Dong, Yun, Deng, Zilin, Tang, Songsong, Shi, Hongcheng, Hu, Pengcheng, Chen, Shuguang, Bao, Jun, Li, Hongdi, Zhou, Jian, Wang, Guobao, Cherry, Simon R, Badawi, Ramsey D, Qi, Jinyi

“… The world's first 194-cm-long total-body PET/CT scanner (uEXPLORER) has been built by the EXPLORER Consortium to offer a transformative platform for human …”
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Characterization of Breast Microcalcifications Using Dual-Energy CBCT: Impact of Detector Configuration on Imaging Performance—A Simulation Study von Karali, Evangelia, Michail, Christos, Fountos, George, Kalyvas, Nektarios, Valais, Ioannis

“… Microcalcifications (HAp, CaCO3, and CaC2O4) in breast tissue may indicate malignancy. Early-stage breast cancer diagnosis may benefit from the clinical …”
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DirectPET: full-size neural network PET reconstruction from sinogram data von Whiteley, William, Luk, Wing K, Gregor, Jens

“… Using patient data, we compare the proposed method to the benchmark ordered subsets expectation maximization (OSEM …”
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Clinical evaluation of whole-body oncologic PET with time-of-flight and point-spread function for the hybrid PET/MR system von Shang, Kun, Cui, Bixiao, Ma, Jie, Shuai, Dongmei, Liang, Zhigang, Jansen, Floris, Zhou, Yun, Lu, Jie, Zhao, Guoguang

“… Lesions up to 30mm in diameter were included. The PET data were reconstructed with a baseline ordered-subsets expectation-maximization (OSEM) algorithm, OSEM+PSF, OSEM+TOF and OSEM+TOF+PSF …”
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A detector's eye view (DEV)-based OSEM algorithm for benchtop x-ray fluorescence computed tomography (XFCT) image reconstruction von Deng, Luzhen, Ahmed, Md F, Jayarathna, Sandun, Feng, Peng, Wei, Biao, Cho, Sang Hyun

“… In this study, we developed a detector's eye view (DEV)-based ordered subsets expectation maximization (OSEM …”
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Improvement in PET/CT image quality in overweight patients with PSF and TOF von Taniguchi, Takafumi, Akamatsu, Go, Kasahara, Yukiko, Mitsumoto, Katsuhiko, Baba, Shingo, Tsutsui, Yuji, Himuro, Kazuhiko, Mikasa, Shohei, Kidera, Daisuke, Sasaki, Masayuki

“… Both phantoms were filled with 18 F solution with a sphere to background ratio of 4:1. The PET data were reconstructed with the baseline ordered-subsets expectation maximization (OSEM …”
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Impact of time of flight and point spread function on quantitative parameters of lung lesions in 18F-FDG PET/CT von Huang, Kemin, Feng, Yanlin, Liang, Weitang, Li, Lin

“… All lesions larger than 10 mm in diameter were included in the study. The PET data were reconstructed with a baseline ordered-subsets expectation–maximization (OSEM) algorithm, OSEM + PSF, OSEM + TOF and OSEM + TOF + PSF respectively …”
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Advanced quantitative evaluation of PET systems using the ACR phantom and NiftyPET software von Markiewicz, Pawel J., da Costa‐Luis, Casper, Dickson, J., Barnes, A., Krokos, G., MacKewn, J., Clark, T., Wimberley, C., MacNaught, G., Yaqub, M. M., Gispert, J. D., Hutton, B. F., Marsden, P., Hammers, A., Reader, A. J., Ourselin, S., Herholz, K., Matthews, J. C., Barkhof, F.

“… Purpose A novel phantom‐imaging platform, a set of software tools, for automated and high‐precision imaging of the American College of Radiology (ACR) positron …”
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Improvement in PET/CT Image Quality with a Combination of Point-Spread Function and Time-of-Flight in Relation to Reconstruction Parameters von Akamatsu, Go, Ishikawa, Kaori, Mitsumoto, Katsuhiko, Taniguchi, Takafumi, Ohya, Nobuyoshi, Baba, Shingo, Abe, Koichiro, Sasaki, Masayuki

“… )F-FDG solution with a 4:1 radioactivity ratio compared with the background. The PET data were reconstructed with the baseline ordered-subsets expectation maximization (OSEM …”
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High-resolution three-dimensional SPECT image reconstruction for  225Ac therapy via OSEM algorithm von Li, Jin-Yang, Zhou, Wen-Ming, Xiong, Xi-An, Yuan, Chen-Zhang, Zhou, Xing-Chen

“… Expectation Maximization (OSEM) algorithm. SPECT imaging of 225 A c presents significant challenges due to low signal intensity, attenuation effects, and scattering, which can compromise image quality and hinder precise treatment planning …”
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Improving the efficiency of small-angle x-ray scattering computed tomography using the OSEM algorithm von Hu, Tao, Wang, Yudan, Du, Guohao, Wang, Yuzhu, Hua, Wenqiang, Deng, Biao, Xie, Honglan, Bian, Fenggang, Xiao, Tiqiao

“… In this study, the ordered subsets expectation maximization (OSEM) algorithm is introduced to improve the efficiency of SAXS-CT …”
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The edge artifact in the point-spread function-based PET reconstruction at different sphere-to-background ratios of radioactivity von Kidera, Daisuke, Kihara, Ken, Akamatsu, Go, Mikasa, Shohei, Taniguchi, Takafumi, Tsutsui, Yuji, Takeshita, Toshiki, Maebatake, Akira, Miwa, Kenta, Sasaki, Masayuki

“…  min using a Biograph mCT scanner. The images were reconstructed with the baseline ordered subsets expectation maximization (OSEM …”
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Effect of Tumor-Pixel Positioning on the Variability of SUV Measurements in PET Images von Itagaki, Koji, Mitsumoto, Katsuhiko, Kajisako, Masaaki, Shioji, Maki, Kawase, Shigeto

“… The PET images were reconstructed with the ordered subsets expectation maximization (OSEM) algorithm with and without point-spread function …”
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Modeling and incorporation of system response functions in 3-D whole body PET von Alessio, A.M., Kinahan, P.E., Lewellen, T.K.

“… Appropriate application of spatially variant system models can correct for degraded resolution response and mispositioning errors. This paper explores the …”
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A List-Mode OSEM-Based Attenuation and Scatter Compensation Method for SPECT von Rahman, Md Ashequr, Laforest, Richard, Jha, Abhinav K.

“… We implemented a GPU-based version of this method using an ordered subsets expectation maximization (OSEM) algorithm …”
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The impact of reconstruction algorithms and time of flight information on PET/CT image quality von Suljic, Alen, Tomse, Petra, Jensterle, Luka, Skrk, Damijan

“… ) algorithm, iterative ordered subsets expectation maximization (OSEM) algorithm (4 iterations, 24 subsets …”
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Evaluation of Rigid-Body Motion Compensation in Cardiac Perfusion SPECT Employing Polar-Map Quantification von Pretorius, P. Hendrik, Johnson, Karen L., King, Michael A.

“… All data were reconstructed with an ordered-subsets expectation-maximization (OSEM) algorithm using 4 projections per subset and 5 iterations …”
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