Prof. Junhai Wen Profile

Prof. Junhai Wen

Research Scientist at Beijing Institute of Technology

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Author

Publications (14)

Proceedings Article | 6 March 2013 Paper

Noise reduction for cone-beam SPECT by penalized reweighted least-squares projection restoration

Hao Zhang, Junhai Wen, Donghao Shi, Rui Yang, Jing Wang, Zhengrong Liang

Proceedings Volume 8668, 86685C (2013) https://doi.org/10.1117/12.2007745

KEYWORDS: Single photon emission computed tomography, Signal to noise ratio, Reconstruction algorithms, Signal attenuation, Denoising, Photon counting, CT reconstruction, Tomography, Spatial resolution, Biomedical optics

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Proceedings Article | 3 March 2012 Paper

SPECT reconstruction with nonuniform attenuation from highly under-sampled projection data

Cuifen Li, Junhai Wen, Kangping Zhang, Donghao Shi, Haixiang Dong, Wenxiao Li, Zhengrong Liang

Proceedings Volume 8313, 83133U (2012) https://doi.org/10.1117/12.910894

KEYWORDS: Reconstruction algorithms, Single photon emission computed tomography, Signal attenuation, Photons, Medical imaging, Expectation maximization algorithms, Algorithm development, Computer simulations, Image analysis, Nuclear medicine

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Proceedings Article | 3 March 2012 Paper

Analytical SPECT reconstruction algorithm for helical cone-beam geometry using ray-driven technology

Kangping Zhang, Junhai Wen, Cuifen Li, Rui Yang, Haixiang Dong, Zhengrong Liang

Proceedings Volume 8313, 83133V (2012) https://doi.org/10.1117/12.910892

KEYWORDS: Reconstruction algorithms, Single photon emission computed tomography, Signal attenuation, CT reconstruction, Collimators, Spatial resolution, Radon transform, Sensors, Testing and analysis, Image analysis

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Proceedings Article | 17 March 2011 Paper

Effect of de-noising and DDRV correction on cone-beam SPECT reconstruction with non-uniform attenuation

Hao Zhang, Junhai Wen, Wen Yin, Cuifen Li, Kangping Zhang, Zhengrong Liang

Proceedings Volume 7961, 796142 (2011) https://doi.org/10.1117/12.877352

KEYWORDS: Single photon emission computed tomography, Reconstruction algorithms, Signal attenuation, Fourier transforms, Tissue optics, Sensors, Analytical research, 3D image reconstruction, Nuclear medicine, Data acquisition

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Proceedings Article | 23 March 2010 Paper

Analytical solution to cone-beam SPECT reconstruction with non-uniform attenuation and distance-dependent resolution variation

Hao Zhang, Junhai Wen, Jing Yang, Peng Hu, Zhengrong Liang

Proceedings Volume 7622, 762259 (2010) https://doi.org/10.1117/12.843790

KEYWORDS: Single photon emission computed tomography, Signal attenuation, Reconstruction algorithms, Fourier transforms, Wavelets, Sensors, Photons, 3D image reconstruction, Image resolution, Spatial resolution

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Proceedings Article | 14 March 2009 Paper

Wavelet based de-noising methods for local SPECT reconstruction with nonuniform attenuation

Li Wang, Junhai Wen, Jing Yang, Yunbin Chen, Zhengrong Liang

Proceedings Volume 7258, 72582O (2009) https://doi.org/10.1117/12.811718

KEYWORDS: Single photon emission computed tomography, Reconstruction algorithms, Signal attenuation, Wavelets, CT reconstruction, Wavelet transforms, Photons, Heart, Image processing, Sensors

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Proceedings Article | 14 March 2009 Paper

Local cone-beam SPECT reconstruction with non-uniform attenuation

Yunbin Chen, Junhai Wen, Li Wang, Zhengrong Liang

Proceedings Volume 7258, 72585E (2009) https://doi.org/10.1117/12.811731

KEYWORDS: Single photon emission computed tomography, Signal attenuation, Sensors, Reconstruction algorithms, Spatial resolution, Heart, Medical imaging, Nuclear medicine, Computed tomography, Radon transform

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Proceedings Article | 22 March 2007 Paper

Application of nonrigid registration in ablation of liver cancer

Songyuan Tang, Yan-wei Chen, Rui Xu, Junhai Wen, Yongtian Wang

Proceedings Volume 6509, 650931 (2007) https://doi.org/10.1117/12.708423

KEYWORDS: Magnetic resonance imaging, Tumors, Image registration, Computed tomography, Liver, Image segmentation, Surgery, Visualization, Liver cancer, Image filtering

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Proceedings Article | 22 March 2007 Paper

Automatic extraction of coronary vessels from digital subtraction angiography

Songyuan Tang, Junhai Wen, Yongtian Wang, Yan-wei Chen

Proceedings Volume 6509, 65092A (2007) https://doi.org/10.1117/12.708749

KEYWORDS: Image registration, Angiography, X-rays, Image filtering, Image segmentation, Diffusion, Spine, Surgery, Arteries, X-ray imaging

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Proceedings Article | 19 March 2007 Paper

A wavelet based method for SPECT reconstruction with non-uniform attenuation

Junhai Wen, Lingkai Kong

Proceedings Volume 6510, 65104W (2007) https://doi.org/10.1117/12.708923

KEYWORDS: Wavelets, Single photon emission computed tomography, Signal attenuation, Reconstruction algorithms, CT reconstruction, Wavelet transforms, Sensors, Radon transform, Photons, Computer simulations

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Proceedings Article | 12 May 2004 Paper

SNR-weighted sinogram smoothing with improved noise-resolution properties for low-dose x-ray computed tomography

Tianfang Li, Jing Wang, Junhai Wen, Xiang Li, Hongbing Lu, Jiang Hsieh, Zhengrong Liang

Proceedings Volume 5370, (2004) https://doi.org/10.1117/12.535560

KEYWORDS: Signal to noise ratio, X-ray computed tomography, Data modeling, X-rays, Sensors, Smoothing, Calibration, Linear filtering, Image filtering, Scanners

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Proceedings Article | 15 May 2003 Paper

Analytical solution to 3D SPECT reconstruction with nonuniform attenuation, scatter, and spatially variant resolution variation for variable focal-length fan-beam collimators

Junhai Wen, Hongbing Lu, Tianfang Li, Zhengrong Liang

Proceedings Volume 5032, (2003) https://doi.org/10.1117/12.480472

KEYWORDS: Signal attenuation, Collimators, Single photon emission computed tomography, Reconstruction algorithms, Radon transform, Interference (communication), Analytical research, Collimation, Sensors, Point spread functions

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Proceedings Article | 15 May 2003 Paper

High-resolution reconstruction for 3D SPECT

Tianfang Li, Junhai Wen, Hongbing Lu, Xiang Li, Zhengrong Liang

Proceedings Volume 5032, (2003) https://doi.org/10.1117/12.481429

KEYWORDS: Image resolution, Single photon emission computed tomography, Reconstruction algorithms, Matrices, Signal attenuation, Sensors, Expectation maximization algorithms, Collimators, Optical resolution, Imaging systems

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Proceedings Article | 9 May 2002 Paper

Toward an analytical solution for 3D SPECT reconstruction with nonuniform attenuation and distance-dependent resolution variation: a Monte Carlo simulation study

Hongbing Lu, Junhai Wen, Xiang Li, Tianfang Li, Guoping Han, Zhengrong Liang

Proceedings Volume 4684, (2002) https://doi.org/10.1117/12.467168

KEYWORDS: Signal attenuation, Single photon emission computed tomography, Reconstruction algorithms, Monte Carlo methods, Deconvolution, Sensors, Radon transform, Interference (communication), Electronic filtering, Filtering (signal processing)

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Showing 5 of 14 publications

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