Research Topics
| Ruola NingSummaryAffiliation: University of Rochester Country: USA Publications
| Collaborators
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Detail Information
Publications
Image denoising based on wavelets and multifractals for singularity detectionJunmei Zhong
Department of Radiology, University of Rochester, Rochester, NY 14642, USA
IEEE Trans Image Process 14:1435-47. 2005..Experimental results demonstrated that this algorithm could achieve both good visual quality and high PSNR for the denoised images...- Flat panel detector-based cone-beam volume CT angiography imaging: system evaluationR Ning
Department of Radiology and Electrical and Computer Engineering, University of Rochester, NY 14642, USA
IEEE Trans Med Imaging 19:949-63. 2000..The results also suggest that to use an FPD for large cone-angle applications, such as body angiography, further investigations are required... - Flat panel detector-based cone beam computed tomography with a circle-plus-two-arcs data acquisition orbit: preliminary phantom studyRuola Ning
Department of Radiology, University of Rochester, Rochester, New York 14642, USA
Med Phys 30:1694-705. 2003.... - Image denoising based on multiscale singularity detection for cone beam CT breast imagingJunmei Zhong
Department of Radiology, University of Rochester, Rochester, NY 14642, USA
IEEE Trans Med Imaging 23:696-703. 2004..This denoising result indicates that in the clinical application of CBCT breast imaging, the patient radiation dose can be significantly reduced... 
Cone Beam Breast CT noise reduction using 3D adaptive Gaussian filteringXiaohua Zhang
Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY, USA
J Xray Sci Technol 17:319-33. 2009..We also proposed a three-dimensional Gaussian filtering scheme to reduce the noise in 3D reconstructed images adaptively without much blurring of detail signal...- Volume fusion for two-circular-orbit cone-beam tomographyZikuan Chen
Department of Imaging Sciences, University of Rochester, New York 14642, USA
Appl Opt 45:5960-6. 2006..In principle, this volume-fusion scheme is applicable for general cone-beam tomography with multiple nonorthogonal and noncircular orbits... 
Enhancement of breast calcification visualization and detection using a modified PG method in Cone Beam Breast CTJiangkun Liu
Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY, USA
J Xray Sci Technol 20:107-20. 2012..This technique was also proved to be useful in reducing the x-ray dose without degrading visualization and detectability of calcifications...- Measurements of the modulation transfer function, normalized noise power spectrum and detective quantum efficiency for two flat panel detectors: a fluoroscopic and a cone beam computer tomography flat panel detectorsRicardo Betancourt Benítez
Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, USA
J Xray Sci Technol 17:279-93. 2009.... - X-ray scatter correction algorithm for cone beam CT imagingRuola Ning
Department of Radiology, University of Rochester, Rochester, New York 14642, USA
Med Phys 31:1195-202. 2004..The results indicate that the beam stop array-based scatter correction algorithm is practical and effective to reduce and correct x-ray scatter for a CBCT imaging task... - Dynamic cone beam CT angiography of carotid and cerebral arteries using canine modelWeixing Cai
Department of Imaging Sciences, University of Rochester, Rochester, New York 14642, USA
Med Phys 39:543-53. 2012.... - Supergridded cone-beam reconstruction and its application to point-spread function calculationZikuan Chen
Department of Radiology, University of Rochester, Box 648, 601 Elmwood Avenue, Rochester, New York 14642, USA
Appl Opt 44:4615-24. 2005..In comparison with a postreconstruction image refinement technique (upsampling and interpolation), the supergridded reconstruction could produce better PSFs (in terms of a smaller FWHM and PSF fitting error)... - NPS characterization and evaluation of a cone beam CT breast imaging systemRicardo Betancourt Benítez
Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY 14642, USA
J Xray Sci Technol 17:17-40. 2009..Finally, the results of the last part of this investigation suggest that this imaging system does not have a 3D isotropic noise distribution along the z-axis; yielding less noisy images at around z = 0.00 m and z = 80 mm... - Why should breast tumour detection go three dimensional?Zikuan Chen
Department of Radiology, University of Rochester, Box 648, 601 Elmwood Avenue, Rochester, NY 14642, USA
Phys Med Biol 48:2217-28. 2003..The discussion is demonstrated with an experiment with a breast surgical specimen. In conclusion, we strongly believe that 3D volumetric representation allows for more accurate breast tumour detection... - Three-dimensional point spread function measurement of cone-beam computed tomography system by iterative edge-blurring algorithmZikuan Chen
Department of Radiology, University of Rochester, Box 648, 601 Elmwood Avenue, Rochester, NY 14642, USA
Phys Med Biol 49:1865-80. 2004..Specifically, we obtained the FWHMs for three specific locations at (0, 0, -40 mm), (0, 0, 0) and (0, 0, 40 mm), which are given by 0.92 +/- 0.10 mm, 0.65 +/- 0.08 mm and 0.93 +/- 0.10 mm, respectively... - Scatter correction for clinical cone beam CT breast imaging based on breast phantom studiesWeixing Cai
Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, USA
J Xray Sci Technol 19:91-109. 2011..The SPR method does not increase tissue contrast or noise while the NSR method increases both... - Filling the Radon domain in computed tomography by local convex combinationZikuan Chen
Department of Radiology, University of Rochester, Box 648, 601 Elmwood Avenue, Rochester, New York 14642, USA
Appl Opt 42:7043-51. 2003..Algorithms and a simulation demonstration are provided... - Forest representation of vessels in cone-beam computed tomographic angiographyZikuan Chen
Department of Radiology, University of Rochester, Box 648, 601 Elmwood Avenue, Rochester, NY 14642, USA
Comput Med Imaging Graph 29:1-14. 2005..We experimentally demonstrate the forest representation of a dog's carotid arteries in a CBCTA system. In principle, the forest representation is useful for managing vessels in both 2D angiographic images and 3D angiographic volumes... - Cone-beam volume CT breast imaging: feasibility studyBiao Chen
Department of Radiology, University of Rochester, New York 14642, USA
Med Phys 29:755-70. 2002.... - Breast volume denoising and noise characterization by 3D wavelet transformZikuan Chen
University of Rochester, Department of Radiology, 601 Elmwood Avenue, Rochester, NY 14642, USA
Comput Med Imaging Graph 28:235-46. 2004..Through 3D visualization, the spatial structure in a subband can also be visually perceived. Experimental demonstration with the breast volume reconstructed from a specimen is provided... - Circle plus Partial Helical Scan Scheme for a Flat Panel Detector-Based Cone Beam Breast X-Ray CTDong Yang
Department of Imaging Sciences, University of Rochester Medical Center, 601 Elmwood Avenue Rochester, NY 14642, USA
Int J Biomed Imaging 2009:637867. 2009..Computer simulations using a numerical breast phantom demonstrated the practical feasibility of this new scheme and correction to those artifacts to a certain degree...