Zobrazeno 1 - 10
of 77
pro vyhledávání: '"David G, Politte"'
Autor:
Maria, Medrano, Ruirui, Liu, Tianyu, Zhao, Tyler, Webb, David G, Politte, Bruce R, Whiting, Rui, Liao, Tao, Ge, Mariela A, Porras-Chaverri, Joseph A, O'Sullivan, Jeffrey F, Williamson
Publikováno v:
Medical Physics. 49:1599-1618
To assess the potential of a joint dual-energy computerized tomography (CT) reconstruction process (statistical image reconstruction method built on a basis vector model (JSIR-BVM)) implemented on a 16-slice commercial CT scanner to measure high spat
Autor:
Maria Jose Medrano Matamoros, Xinyuan Chen, Tao Ge, Tianyu Zhao, Rui Liao, David G. Politte, Jeffrey F. Willamson, Bruce R. Whiting, Yao Hao, Baozhou Sun, Joseph A. O'Sullivan
Publikováno v:
Medical Imaging 2022: Physics of Medical Imaging.
Autor:
Dong Han, Jeffrey F. Williamson, Bruce R. Whiting, Tianyu Zhao, David G. Politte, Joseph A. O'Sullivan, Shuangyue Zhang
Publikováno v:
Medical Physics. 46:273-285
PURPOSE: To experimentally commission a dual-energy CT (DECT) joint statistical image reconstruction (JSIR) method, which is built on a linear basis vector model (BVM) of material characterization, for proton stopping power ratio (SPR) estimation. ME
Autor:
Joseph A. O'Sullivan, Maria Medrano, Tianyu Zhao, David G. Politte, Bruce R. Whiting, T. B. Webb, Jeffrey F. Williamson, Mariela A. Porras-Chaverri, Ruirui Liu
Publikováno v:
Medical Imaging 2020: Physics of Medical Imaging.
Proton radiotherapy has the potential to provide clinically effective treatment and highly conformal dose delivery when the rapid dose falloff at the end of its proton-beam range is correctly aligned to the distal margin of the clinical target volume
Autor:
Joseph A. O'Sullivan, Dong Han, Jeffrey F. Williamson, Mariela A. Porras-Chaverri, David G. Politte
Publikováno v:
Medical Physics. 44:2438-2446
Purpose To evaluate and compare the theoretically achievable accuracy of two families of two-parameter photon cross-section models: basis vector model (BVM) and modified parametric fit model (mPFM). Method The modified PFM assumes that photoelectric
Publikováno v:
15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine.
Photon counting CT (PCCT) is an x-ray imaging technique that has undergone great development in the past decade. PCCT has the potential to improve dose efficiency and low-dose performance. In this paper, we propose a statistics-based iterative algori
Autor:
Maria Medrano, Bruce R. Whiting, Tao Ge, Jeffrey F. Williamson, Rui Liao, David G. Politte, Tianyu Zhao, Joseph A. O'Sullivan
Publikováno v:
Computational Imaging
Autor:
Joshua D. Evans, Yaqi Chen, Jeffrey F. Williamson, Joseph A. O'Sullivan, Dong Han, David G. Politte, Bruce R. Whiting
Publikováno v:
IEEE Transactions on Medical Imaging. 35:685-698
We propose a new algorithm, called line integral alternating minimization (LIAM), for dual-energy X-ray CT image reconstruction. Instead of obtaining component images by minimizing the discrepancy between the data and the mean estimates, LIAM allows
Autor:
Fred W. Prior, Jason Causey, Bo Jiang, Xiuzhen Huang, Shuzhong Zhang, Jake Qualls, Junyu Zhang, David G. Politte, Shiqian Ma
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
Scientific reports, vol 8, iss 1
Scientific Reports
Scientific reports, vol 8, iss 1
Scientific Reports
Computed tomography (CT) examinations are commonly used to predict lung nodule malignancy in patients, which are shown to improve noninvasive early diagnosis of lung cancer. It remains challenging for computational approaches to achieve performance c
Publikováno v:
Medical Physics. 42:2908-2914
Purpose: To provide a noninvasive technique to measure the intensity profile of the fan beam in a computed tomography (CT) scanner that is cost effective and easily implemented without the need to access proprietary scanner information or service mod