Zobrazeno 1 - 10
of 24
pro vyhledávání: '"George S. K. Fung"'
Publikováno v:
Medical Physics. 48:3479-3499
PURPOSE In this work, we explore the potential of region-of-interest (ROI) imaging in x-ray computed tomography (CT). Using two dynamic beam attenuator (DBA) concepts for fluence field modulation (FFM) previously developed, we investigate and evaluat
Publikováno v:
Medical Physics. 47:4827-4837
Purpose We present a new concept for dynamic fluence field modulation (FFM) in x-ray computed tomography (CT). The so-called z-aligned sheet-based dynamic beam attenuator (z-sbDBA) is developed to dynamically compensate variations in patient attenuat
Autor:
Caterina B. Monti, Marly van Assen, Arthur E. Stillman, Scott J. Lee, Philipp Hoelzer, George S. K. Fung, Francesco Secchi, Francesco Sardanelli, Carlo N. De Cecco
Publikováno v:
Radiol Artif Intell
The purpose of this work was to assess the performance of a convolutional neural network (CNN) for automatic thoracic aortic measurements in a heterogeneous population. From June 2018 to May 2019, this study retrospectively analyzed 250 chest CT scan
Publikováno v:
Medical Physics. 46:5528-5537
PURPOSE It has been a long-standing wish in computed tomography (CT) to compensate the emitted x-ray beam intensity for the patient's changing attenuation during the rotation of a CT data acquisition. The patient attenuation changes both spatially, a
Publikováno v:
Medical Imaging 2020: Physics of Medical Imaging.
In this work, we present a new concept for dynamic beam attenuation, the z-aligned sheet-based dynamic beam attenuator (z-sbDBA). Like the previously presented sbDBA, it allows dynamically adapting the x-ray intensity over the projection angle and al
Use of quantitative SPECT/CT reconstruction in 99mTc-sestamibi imaging of patients with renal masses
Autor:
Lilja B. Solnes, Steven P. Rowe, George S. K. Fung, Mehrbod S. Javadi, Yong Du, Michael A. Gorin, Mohamad E. Allaf, Eric C. Frey, Krystyna M. Jones, Sara Sheikhbahaei
Publikováno v:
Annals of Nuclear Medicine. 32:87-93
Technetium-99m (99mTc)-sestamibi single-photon emission computed tomography/computed tomography (SPECT/CT) has previously been shown to allow for the accurate differentiation of benign renal oncocytomas and hybrid oncocytic/chromophobe tumors (HOCTs)
Publikováno v:
Medical Imaging 2019: Physics of Medical Imaging.
In our previous study we successfully built a novel sheet-based dynamic beam attenuator (sbDBA) for fluence field modulation in X-ray computed tomography (CT) and performed a first-time experimental validation. In this work, we focus on the optimizat
Autor:
Moses Lee, Iman Khodarahmi, Reham R. Haroun, Elliot K. Fishman, Jan Fritz, Matthew K. Fuld, Lew C. Schon, George S. K. Fung
Publikováno v:
Investigative radiology. 53(12)
The aim of this study was to compare the effects of combined virtual monoenergetic extrapolation (VME) of dual-energy computed tomography data and iterative metal artifact reduction (iMAR) at higher photon energies on low- and high-density metal arti
Autor:
Wesley W. Ludwig, Rishab Gurnani, Brian R. Matlaga, Dan Stoianovici, Pan Li, George S. K. Fung, Satomi Kawamoto, Justin B. Ziemba, Elliot K. Fishman
Publikováno v:
Journal of endourology. 32(8)
CT is the gold standard for visualizing renal and ureteral calculi. CT three-dimensional reformatting allows for automatic, accurate, and reliable measurement of stone size, volume, density, and location. In this study, we aimed to develop and test a
Publikováno v:
Medical Physics. 42:5329-5341
Purpose: Newly developed spectral computed tomography (CT) such as photon counting detector CT enables more accurate tissue-type identification through material decomposition technique. Many iterative reconstruction methods, including those developed