Now showing items 1-10 of 10

    • A neural network-based method for spectral distortion correction in photon counting x-ray CT. 

      Touch, Mengheng; Clark, Darin P; Barber, William; Badea, Cristian T (Physics in medicine and biology, 2016-08)
      Spectral CT using a photon counting x-ray detector (PCXD) shows great potential for measuring material composition based on energy dependent x-ray attenuation. Spectral CT is especially suited for imaging with K-edge contrast ...
    • An automated method for comparing motion artifacts in cine four-dimensional computed tomography images. 

      Cui, Guoqiang; Jew, Brian; Hong, Julian C; Johnston, Eric W; Loo, Billy W; Maxim, Peter G (Journal of applied clinical medical physics, 2012-11-08)
      The aim of this study is to develop an automated method to objectively compare motion artifacts in two four-dimensional computed tomography (4D CT) image sets, and identify the one that would appear to human observers with ...
    • Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room. 

      Lee, Sung-Woo; Jin, Jian-Yue; Guan, Huaiqun; Martin, Flavious; Kim, Jae Ho; Yin, Fang-Fang (Journal of applied clinical medical physics, 2008-01-13)
      INTRODUCTION:Although flat-panel based X-ray imaging has been well tested in diagnostic radiology, its use as an image-guided-radiotherapy (IGRT) system in a treatment room is new and requires systematic assessment. MATERIALS ...
    • Dual-energy computed tomography with advanced postimage acquisition data processing: improved determination of urinary stone composition. 

      Ferrandino, MN; Pierre, SA; Simmons, WN; Paulson, EK; Albala, DM; Preminger, GM (J Endourol, 2010-03)
      INTRODUCTION: The characterization of urinary calculi using noninvasive methods has the potential to affect clinical management. CT remains the gold standard for diagnosis of urinary calculi, but has not reliably differentiated ...
    • Evaluation of integrated respiratory gating systems on a Novalis Tx system. 

      Chang, Zheng; Liu, Tonghai; Cai, Jing; Chen, Qing; Wang, Zhiheng; Yin, Fang-Fang (Journal of applied clinical medical physics, 2011-04-04)
      The purpose of this study was to investigate the accuracy of motion tracking and radiation delivery control of integrated gating systems on a Novalis Tx system. The study was performed on a Novalis Tx system, which is equipped ...
    • Hybrid spectral CT reconstruction. 

      Clark, Darin P; Badea, Cristian T (PLoS One, 2017)
      Current photon counting x-ray detector (PCD) technology faces limitations associated with spectral fidelity and photon starvation. One strategy for addressing these limitations is to supplement PCD data with high-resolution, ...
    • Impact of beta-blockade premedication on image quality of ECG-gated thoracic aorta CT angiography. 

      Entezari, Pegah; Collins, Jeremy; Chalian, Hamid; Tore, Huseyin Gurkan; Carr, James; Yaghmai, Vahid (Acta radiologica (Stockholm, Sweden : 1987), 2014-12)
      BACKGROUND: Thoracic aortic aneurysm is one of the most common aorta pathologies worldwide, which is commonly evaluated by computed tomography angiography (CTA). One of the routine methods to improve the image quality of ...
    • Investigation of sliced body volume (SBV) as respiratory surrogate. 

      Cai, Jing; Chang, Zheng; O'Daniel, Jennifer; Yoo, Sua; Ge, Hong; Kelsey, Christopher; Yin, Fang-Fang (Journal of applied clinical medical physics, 2013-01-07)
      The purpose of this study was to evaluate the sliced body volume (SBV) as a respiratory surrogate by comparing with the real-time position management (RPM) in phantom and patient cases. Using the SBV surrogate, breathing ...
    • Optimization of reduced-dose MDCT of thoracic aorta using iterative reconstruction. 

      Töre, Hüseyin Gürkan; Entezari, Pegah; Chalian, Hamid; Gonzalez-Guindalini, Fernanda Dias; Botelho, Marcos Paulo Ferreira; Yaghmai, Vahid (Journal of computer assisted tomography, 2014-01)
      OBJECTIVE: To evaluate the contribution of iterative reconstruction on image quality of reduced-dose multidetector computed tomography of the thoracic aorta. METHODS: A torso phantom was scanned using two tube potentials ...
    • Spectrotemporal CT data acquisition and reconstruction at low dose. 

      Clark, Darin P; Lee, Chang-Lung; Kirsch, David G; Badea, Cristian T (Med Phys, 2015-11)
      PURPOSE: X-ray computed tomography (CT) is widely used, both clinically and preclinically, for fast, high-resolution anatomic imaging; however, compelling opportunities exist to expand its use in functional imaging applications. ...