Compressive sensing-based interior tomography: preliminary clinical applicationHengyong Yu
Department of Radiology, Division of Radiologic Sciences, Wake Forest University Health Science, Winston Salem, NC, USA
J Comput Assist Tomogr 35:762-4. 2011
..This is the first clinical application of the CS-based interior reconstruction techniques, and the results show an excellent match with those reconstructed from global projections...
Finite detector based projection model for high spatial resolutionHengyong Yu
Department of Radiology, Division of Radiologic Sciences, Wake Forest University Health Sciences, Winston Salem, NC, USA
J Xray Sci Technol 20:229-38. 2012
..In the numerical simulation, our method produces improved spatial resolution and suppresses high-frequency artifacts...
Practical cone-beam lambda tomographyHengyong Yu
CT Micro CT Lab, Department of Radiology, University of Iowa, Iowa City, Iowa 52242, USA
Med Phys 33:3640-6. 2006
..The algorithm is implemented assuming an equispatial planar detector and a nonstandard spiral trajectory. The numerical simulation results demonstrate the merits of our method...
- Data consistency based translational motion artifact reduction in fan-beam CT
Hengyong Yu
CT Micro CT Lab, Department of Radiology, University of Iowa, Iowa City 52242, USA
IEEE Trans Med Imaging 25:792-803. 2006
..Furthermore, we present numerical simulation results to show that our approach is accurate and robust...
- Data consistency based rigid motion artifact reduction in fan-beam CT
Hengyong Yu
CT Micro CT Lab, Department of Radiology, University of Iowa, Iowa City, IA 52242, USA
IEEE Trans Med Imaging 26:249-60. 2007
..After the motion parameters are estimated, image reconstruction can be performed to compensate for the motion effects. Finally, we implement the algorithm and evaluate its performance in numerical simulations...
- Compressive sampling based interior reconstruction for dynamic carbon nanotube micro-CT
Hengyong Yu
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, VA, USA
J Xray Sci Technol 17:295-303. 2009
..Both numerical simulations and in vivo mouse studies are performed to demonstrate the feasibility of our methodology...
- Supplemental analysis on compressed sensing based interior tomography
Hengyong Yu
CT Laboratory, Biomedical Imaging Division, VT WFU School of Biomedical Engineering, Virginia Tech, Blacksburg, VA 24061, USA
Phys Med Biol 54:N425-32. 2009
..In the proofs, we implicitly utilized the property that if an artifact image assumes a constant value within the ROI, then this constant must be zero. Here we prove this property in the space of square integrable functions...
- Compressed sensing based interior tomography
Hengyong Yu
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Science, Virginia Tech, Blacksburg, VA 24061, USA
Phys Med Biol 54:2791-805. 2009
..To illustrate the merits of our finding, we develop an iterative interior reconstruction algorithm that minimizes the total variation of a reconstructed image and evaluate the performance in numerical simulation...
- A soft-threshold filtering approach for reconstruction from a limited number of projections
Hengyong Yu
Department of Radiology, Wake Forest University Health Sciences, Winston Salem, NC 27157, USA
Phys Med Biol 55:3905-16. 2010
..These two methods are evaluated in numerical simulation. The results demonstrate the merits of the proposed techniques...
- Digital tomosynthesis aided by low-resolution exact computed tomography
Kai Zeng
VT WFU School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
J Comput Assist Tomogr 31:976-83. 2007
..The results show that images obtained by our approach are clearly better than those obtained without such a CT scan...
- Ultra-low dose lung CT perfusion regularized by a previous scan
Hengyong Yu
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Science, Virginia Tech, 1880 Pratt Drive, Blacksburg, VA 24061, USA
Acad Radiol 16:363-73. 2009
..Normal and ultra-low-dose lung computed tomographic perfusion studies were compared in terms of the estimation accuracy of pulmonary functional parameters...
- A differentiable Shepp-Logan phantom and its applications in exact cone-beam CT
Hengyong Yu
CT Micro CT Laboratory, Department of Radiology, University of Iowa, Iowa City, 52242, USA
Phys Med Biol 50:5583-95. 2005
..Our numerical simulation shows that the reconstructed DSLP has a better image quality than the reconstructed SLP, and is complementary to the traditional SLP for evaluation of the exact cone-beam CT algorithms...
- Exact BPF and FBP algorithms for nonstandard saddle curves
Hengyong Yu
CT/Micro-CT Laboratory, Department of Radiology, University of Iowa, Iowa City, Iowa 52242, USA
Med Phys 32:3305-12. 2005
..The simulation results demonstrate that the FBP algorithm produces better image quality than the BPF algorithm, while both the algorithms exhibit similar noise characteristics...
- Cone-beam mammo-computed tomography from data along two tilting arcs
Kai Zeng
CT Micro CT Laboratory, Department of Radiology, University of Iowa, Iowa City, Iowa 52242, USA
Med Phys 33:3621-33. 2006
..We also demonstrate the system performance and clinical utility of the proposed technique in numerical simulations...
- Knowledge-based dynamic volumetric cardiac computed tomography with saddle curve trajectory
Deepak Bharkhada
Biomedical Imaging Division, Virginia Tech Wake Forest University School of Biomedical Engineering and Sciences, Blacksburg, VA 27157, USA
J Comput Assist Tomogr 32:942-50. 2008
..Necessary background is provided, and the effectiveness of the algorithms is demonstrated in numerical simulations with the dynamic thorax phantom...
- A general exact reconstruction for cone-beam CT via backprojection-filtration
Yangbo Ye
Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
IEEE Trans Med Imaging 24:1190-8. 2005
..The algorithmic implementation and numerical results are described to support the correctness of our general claim...
- Approximate and exact cone-beam reconstruction with standard and non-standard spiral scanning
Ge Wang
Biomedical Imaging Division, VT WFU School of Biomedical Engineering, Virginia Tech, Blacksburg, VA 24061, USA
Phys Med Biol 52:R1-13. 2007
..Here we present an overview of some key results in this area...
- A unified framework for exact cone-beam reconstruction formulas
Shiying Zhao
CT Micro CT Laboratory, Department of Radiology, University of Iowa, 200 Hawkins Drive, Iowa City, Iowa 52242, USA
Med Phys 32:1712-21. 2005
..A possibility for generalization of the Katsevich filtered-backprojection reconstruction method is also discussed from the viewpoint of this framework...
- Demonstration of dose and scatter reductions for interior computed tomography
Deepak Bharkhada
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Science, Wake Forest University, Winston Salem, NC 27157, USA
J Comput Assist Tomogr 33:967-72. 2009
..Results indicate that interior tomography may reduce the x-ray dose by 18% to 58% and scatter to the detectors by 19% to 59% as the FOV is reduced from 50 to 8.6 cm...
- Cardiac computed tomography radiation dose reduction using interior reconstruction algorithm with the aorta and vertebra as known information
Deepak Bharkhada
Biomedical Imaging Division, Virginia Tech Wake Forest University School of Biomedical Engineering and Sciences, Winston Salem, NC 27157, USA
J Comput Assist Tomogr 33:338-47. 2009
..Our results demonstrate that it is feasible to use practical prior information and exactly reconstruct cardiovascular structures only from projection data along x-ray paths through the ROI...
- A backprojection-filtration algorithm for nonstandard spiral cone-beam CT with an n-PI-window
Hengyong Yu
CT/Micro-CT Laboratory, Department of Radiology, University of Iowa, Iowa City, IA 52242, USA
Phys Med Biol 50:2099-111. 2005
..The proposed BPF algorithm consists of three steps: cone-beam data differentiation, weighted backprojection and inverse Hilbert filtration. Our simulated results demonstrate the feasibility and merits of the proposed algorithm...
- Lambda tomography with discontinuous scanning trajectories
Hengyong Yu
Biomedical Imaging Division, VT WFU School of Biomedical Engineering, Virginia Tech, Blacksburg, VA 24061, USA
Phys Med Biol 52:4331-44. 2007
..Our simulation results verify the correctness and demonstrate the merits of the proposed scheme...
- A segmentation-based method for metal artifact reduction
Hengyong Yu
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Science, Virginia Technical, Blacksburg, VA 24061, USA
Acad Radiol 14:495-504. 2007
..We propose a novel segmentation-based interpolation method to reduce the metal artifacts caused by surgical aneurysm clips...
- Image reconstruction from limited angle projections collected by multisource interior x-ray imaging systems
Baodong Liu
Department of Radiology, Division of Radiologic Sciences, Wake Forest University Health Sciences, Winston Salem, NC, 27157, USA
Phys Med Biol 56:6337-57. 2011
..Finally, quantitative image analysis shows that it is possible to make an ultrafast micro-CT using a multisource interior x-ray system scheme combined with the state-of-the-art interior tomography...
- Completeness map evaluation demonstrated with candidate next-generation cardiac CT architectures
Baodong Liu
Department of Radiology, Wake Forest University Health Sciences, Winston Salem, NC 27157, USA
Med Phys 39:2405-16. 2012
..They illustrate the utility of completeness map by applying the completeness map concept to a number of candidate CT system designs, as part of a study to advance the state-of-the-art in cardiac CT...
- A scheme for multisource interior tomography
Ge Wang
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia 24061, USA
Med Phys 36:3575-81. 2009
..The results suggest a scheme for ultrafast tomography (such as with a limited number of sources and in a scanning mode) to shorten data acquisition time and to suppress motion blurring...
- Projection-based bolus detection for computed tomographic angiography
Donghui Lu
CT Micro CT Laboratory, Department of Radiology, University of Iowa, Iowa City, IA, USA
J Comput Assist Tomogr 30:846-9. 2006
..Then, we evaluate our new method in numerical and animal studies. Our results indicate that this method allows significantly better temporal resolution and is computationally more efficient, as compared with the image-based methods...
- An outlook on x-ray CT research and development
Ge Wang
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Science, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 240601, USA
Med Phys 35:1051-64. 2008
..We also sketch several representative biomedical applications...
- Towards omni-tomography--grand fusion of multiple modalities for simultaneous interior tomography
Ge Wang
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Sciences, Blacksburg, Virginia Tech, Blacksburg, Virginia, United States of America
PLoS ONE 7:e39700. 2012
..To address this challenge, omni-tomography is now unveiled as an emerging direction for biomedical imaging and systems biomedicine...
- A general local reconstruction approach based on a truncated hilbert transform
Yangbo Ye
Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
Int J Biomed Imaging 2007:63634. 2007
..We also report primary numerical simulation results to demonstrate the correctness and merits of our finding. Our work has major theoretical potentials and innovative practical applications...
- Experimental studies on few-view reconstruction for high-resolution micro-CT
Kriti Sen Sharma
Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, USA
J Xray Sci Technol 21:25-42. 2013
..The study motivates the adoption of advanced reconstruction techniques to allow faster scanning, lower dosage, and reduced data size in high-resolution micro-CT...
- Inverse fourier transform in the gamma coordinate system
Yuchuan Wei
Department of Radiation Oncology, Wake Forest University School of Medicine, Winston Salem, NC 27157, USA
Int J Biomed Imaging 2011:285130. 2011
..Our analysis on the motion of the frequency plane is related to the Frenet-Serret theorem in the differential geometry...
- Gel'fand-Graev's reconstruction formula in the 3D real space
Yangbo Ye
Department of Mathematics, University of Iowa, Iowa City, Iowa 52242 and School of Mathematics, Shandong University, Jinan, Shandong 250100, China
Med Phys 38:S69. 2011
..Conclusions: This paper shows the power of mathematics for tomographic imaging and the value of a pure theoretical finding, which may appear quite irrelevant to daily healthcare at the first glance...
- Exact interior reconstruction with cone-beam CT
Yangbo Ye
Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
Int J Biomed Imaging 2007:10693. 2007
..These results have many implications in the CT field and can be extended to other tomographic modalities, such as SPECT/PET, MRI...
- Exact interior reconstruction from truncated limited-angle projection data
Yangbo Ye
Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
Int J Biomed Imaging 2008:427989. 2008
..These results improve the classical theory of Hamaker et al. (1980)...
- Line-source based x-ray tomography
Deepak Bharkhada
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Sciences, Wake Forest University, Winston Salem, NC 27157, USA
Int J Biomed Imaging 2009:534516. 2009
..Our numerical simulation results demonstrate the feasibility of our novel line-source based x-ray CT approach and the proposed generalized SART algorithm...
- Design, analysis and simulation for development of the first clinical micro-CT scanner
Ge Wang
CT Micro CT Laboratory, Department of Radiology, University of Iowa, Iowa City, IA 52242, USA
Acad Radiol 12:511-25. 2005
..Imaging of microarchitectures of the cancellous bone would be also an important application...
- Piecewise-constant-model-based interior tomography applied to dentin tubules
Peng He
The Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing 400044, China
Comput Math Methods Med 2013:892451. 2013
..Volume rendering confirms the merits of our method in terms of preserving the interior microstructure of the dentin specimen...
- Preliminary experimental results from a MARS Micro-CT system
Peng He
The Key Lab of Optoelectronic Technology and System of the Education Ministry of China, Chongqing University, Chongqing, China
J Xray Sci Technol 20:199-211. 2012
....
- SART-Type Image Reconstruction from a Limited Number of Projections with the Sparsity Constraint
Hengyong Yu
SBES Division and ICTAS Center for Biomedical Imaging, VT WFU School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
Int J Biomed Imaging 2010:934847. 2010
..Our preliminary results demonstrate that the sparsity constraint helps effectively improve the quality of reconstructed images and reduce the number of necessary projections...
- A general total variation minimization theorem for compressed sensing based interior tomography
Weimin Han
Department of Mathematics, University of Iowa, Iowa City, IA 52242, USA
Int J Biomed Imaging 2009:125871. 2009
..Our major mathematical tool to prove this result is functional analysis without involving the Dirac delta function, which was heuristically used by Yu and Wang (2009)...
- Cone-beam composite-circling scan and exact image reconstruction for a quasi-short object
Hengyong Yu
Biomedical Imaging Division, VT WFU School of Biomedical Engineering and Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
Int J Biomed Imaging 2007:87319. 2007
..The initial simulation results demonstrate the correctness of the proposed exact reconstruction method and the merits of the proposed mode...
- Feldkamp-type VOI reconstruction from super-short-scan cone-beam data
Hengyong Yu
College of Communication Engineering, Hangzhou Institute of Electronics Engineering, Hangzhou, Zhejiang 310018, China
Med Phys 31:1357-62. 2004
....
- [Slice reconstruction of 3D vessel based on object-oriented quantization]
Hengyong Yu
Institute of Image Processing, Xi'an Jiaotong University, Xi'an 710049
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 20:318-21. 2003
..The SSGR is especially suitable for solving the problem of sparse projection and limited-views. Finally, the simulated results have proved the feasibility of the model and the validity of the algorithm...
- [Review of evaluation techniques for medical image reconstruction]
Hengyong Yu
Institute of Image Processing, Xi'an Jiaotong University, Xi'an 710049
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 20:162-6, 170. 2003
..This study provides a useful basis for selection and design of medical image reconstruction algorithms...
