Dr. Junguo Bian Profile

Dr. Junguo Bian

Postdoctor Scholar at Univ of Chicago Medicine

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Publications (11)

Proceedings Article | 22 March 2012 Paper

A preliminary investigation of reduced-view image reconstruction from low dose breast CT data

Junguo Bian, Xiao Han, Kai Yang, Emil Sidky, John Boone, Xiaochuan Pan

Proceedings Volume 8313, 831325 (2012) https://doi.org/10.1117/12.911325

KEYWORDS: Reconstruction algorithms, Breast, Image restoration, Computed tomography, Data modeling, Algorithm development, Data acquisition, Scanners, Mammography, Prototyping

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Proceedings Article | 17 March 2011 Paper

Feasibility study of low-dose intra-operative cone-beam CT for image-guided surgery

Xiao Han, Shuanghe Shi, Junguo Bian, Patrick Helm, Emil Sidky, Xiaochuan Pan

Proceedings Volume 7961, 79615P (2011) https://doi.org/10.1117/12.878915

KEYWORDS: Computed tomography, Reconstruction algorithms, Image-guided intervention, Medical imaging, Physics, Current controlled current source, CT reconstruction, Data acquisition, Computer simulations

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Proceedings Article | 23 March 2010 Paper

A preliminary study of few-view image reconstruction of sparse objects in cone-beam micro-CT

Xiao Han, Junguo Bian, Diane Eaker, Emil Sidky, Erik Ritman, Xiaochuan Pan

Proceedings Volume 7622, 76222P (2010) https://doi.org/10.1117/12.845320

KEYWORDS: Image restoration, Reconstruction algorithms, Medical imaging, Imaging systems, Image processing, Physics, Current controlled current source, Visual analytics, Visualization, Quantitative analysis

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Proceedings Article | 13 March 2009 Paper

Prior-image-based few-view cone beam CT for applications to daily scan in image-guided radiation therapy: preliminary study

Seungryong Cho, Erik Pearson, Emil Sidky, Junguo Bian, Charles Pelizzari, Xiaochuan Pan

Proceedings Volume 7258, 72581U (2009) https://doi.org/10.1117/12.811345

KEYWORDS: Reconstruction algorithms, Image restoration, Computed tomography, Radiotherapy, Image processing, Binary data, Algorithm development, Prostate, Safety, Motion detection

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Proceedings Article | 25 March 2008 Paper

Tomosynthesis with source positions distributed over a surface

Dan Xia, Seungryong Cho, Junguo Bian, Emil Sidky, Charles Pelizzari, Xiaochuan Pan

Proceedings Volume 6913, 69132A (2008) https://doi.org/10.1117/12.772687

KEYWORDS: Sensors, Medical imaging, Physics, Rutherfordium, X-ray sources, Image segmentation, Lead, Data acquisition, Yield improvement, Image quality

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Proceedings Article | 18 March 2008 Paper

A preliminary investigation of ROI-image reconstruction with the rebinned BPF algorithm

Junguo Bian, Dan Xia, Lifeng Yu, Emil Sidky, Xiaochuan Pan

Proceedings Volume 6913, 69132I (2008) https://doi.org/10.1117/12.772096

KEYWORDS: Reconstruction algorithms, Detection and tracking algorithms, Data acquisition, Medical imaging, Sensors, Physics, Image restoration

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Proceedings Article | 18 March 2008 Paper

Non-circular scans and image reconstruction for breast CT

Junguo Bian, Nathan Packard, Kai Yang, Dan Xia, John Boone, Xiaochuan Pan

Proceedings Volume 6913, 69134G (2008) https://doi.org/10.1117/12.772093

KEYWORDS: Breast, Computed tomography, Reconstruction algorithms, Image restoration, CT reconstruction, Data acquisition, Medical imaging, Scanners, 3D image processing, Algorithm development

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Proceedings Article | 18 March 2008 Paper

A preliminary investigation of using prior information for potentially improving image reconstruction in few-view CT

Seungryong Cho, Emil Sidky, Junguo Bian, Charles Pelizzari, Xiaochuan Pan

Proceedings Volume 6913, 69132C (2008) https://doi.org/10.1117/12.772063

KEYWORDS: Reconstruction algorithms, Computed tomography, Expectation maximization algorithms, Image restoration, Algorithm development, Radiotherapy, CT reconstruction, Image quality, Detection and tracking algorithms, Image registration

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Proceedings Article | 6 March 2008 Paper

Comparison of variable and fixed focal length cone beam CT in diagnostic imaging

Samuel LaRoque, Junguo Bian, Emil Sidky, Xiaochuan Pan

Proceedings Volume 6917, 69170V (2008) https://doi.org/10.1117/12.769559

KEYWORDS: Sensors, Head, Diagnostics, X-ray computed tomography, Computed tomography, Spherical lenses, X-ray sources, X-rays, Reconstruction algorithms, Medical imaging

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We use a task-based study to objectively evaluate the effect of variable versus fixed focal length in determining the position of a lesion in helical cone-beam computed tomography (HCBCT). This method will be used to assess whether variable focal length CBCT scans provide a measurable improvement in estimating lesion position relative to fixed focal length CBCT in diagnostic applications. In this simulation study a 1 cm diameter spherical lesion is placed at four different positions within a three-dimensional Shepp-Logan head phantom. The axial plane is taken to point along the z-axis, which is also the central axis of the helix. The lesion is placed at the center of the Shepp-Logan phantom, at positions displaced ±5 cm in x, and at a position displaced 5 cm in y. Four different scans of pitch length 10 cm are then performed using 128 views over 360° with a 100×300 pixel (20 cm×60 cm) detector. Two scans have a fixed focal length of 50 cm between the X-ray source and the center of rotation (COR), varying only in the starting angle of the source (0° and 90°). We call this the circular configuration. The other two scans have a variable focal length following the curvature of the head phantom and ranging from 37.5 cm to 50 cm. We call this the elliptical configuration. The detector rotates with the source but maintains a constant distance of 30 cm from the COR. A likelihood gridding technique is used to assess bias and variance in the position estimates determined from each scan configuration. We find that the biases are small relative to the variances, and have no apparent preferred direction. Of the 24 circular to elliptical comparisons made, we find that in 14 cases the elliptical scan has a smaller variance that is statistically significant(p ≤ 0.05). By contrast, we find no statistically significant cases in which the circular scan gives a smaller variance compared to the elliptical scan. We conclude that using a variable focal length adapted to the contours of the head phantom provides more precise results, but caution that this is a limited pilot study and many more factors will be accounted for in future work.

Proceedings Article | 19 March 2007 Paper

Image reconstruction from rebinned helical cone-beam projection data

Dan Xia, Lifeng Yu, Junguo Bian, Xiaochuan Pan

Proceedings Volume 6510, 651057 (2007) https://doi.org/10.1117/12.713720

KEYWORDS: Reconstruction algorithms, Image segmentation, Algorithm development, Image processing algorithms and systems, Image restoration, Data acquisition, Sensors, 3D image reconstruction, Computed tomography, Image filtering

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Proceedings Article | 14 March 2007 Paper

Dual-energy cone-beam micro-CT for animal imaging: preliminary study

Seungryong Cho, Emil Sidky, Junguo Bian, Xiaochuan Pan

Proceedings Volume 6510, 65103M (2007) https://doi.org/10.1117/12.713243

KEYWORDS: X-rays, Tissues, Bone, Image processing, X-ray imaging, Data conversion, Signal attenuation, Image restoration, X-ray computed tomography, Imaging systems

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Showing 5 of 11 publications

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