Zobrazeno 1 - 10
of 164
pro vyhledávání: '"Howard Amols"'
Publikováno v:
Journal of Applied Clinical Medical Physics
Most of the treatment units, both new and old models, are equipped with a megavoltage portal imager but its use for volumetric imaging is limited. This is mainly due to the poor image quality produced by the high‐energy treatment beam (>6 MV). A li
Publikováno v:
Journal of Cancer Research and Therapeutics, Vol 13, Iss 2, Pp 297-303 (2017)
Aim: The aim of work is to explore a quick, efficient, and effective patient-specific intensity-modulated radiation therapy (IMRT) quality assurance (QA). Materials and Methods: Software tools were developed to extract and analyze the multi-leaf coll
Autor:
Ellen Yorke, Gloria C. Li, J.G. Mechalakos, D Li, Howard Amols, Åse Ballangrud, Andreas Rimner, P Cohen
Publikováno v:
Medical physics. 39(6Part7)
Purpose: To develop a new method for accurate measurement of dynamic respiratory tidal volume, we investigate the feasibility of measuring torso volume change using optical surfaceimaging (OSI). Methods: Based on a validated volume conservation theor
Autor:
Rajesh Kumar, CP Bhatt, N.V. N. Madhusudhana Sresty, Y. S. Mayya, Howard Amols, G Chourasiya, S.D. Sharma, Shrikant Deshpande
Publikováno v:
Journal of Cancer Research and Therapeutics, Vol 10, Iss 3, Pp 611-617 (2014)
Aim of the Study: Statistical analysis of pre-treatment dose verification of intensity-modulated radiotherapy (IMRT) fields to assess the quality of the IMRT practice at different radiotherapy centers. Materials and Methods: The dose verification dat
Autor:
Yoshiya Yamada, Guang Li, H Kang, Michael Lovelock, Åse Ballangrud, James Mechalakos, Assen S. Kirov, Howard Amols, Li Cheng Kuo
Publikováno v:
Medical Physics. 38:3981-3994
PURPOSE To establish a new clinical procedure in frameless stereotactic radiosurgery (SRS) for patient setup verification at treatment couch angles as well as for head-motion monitoring during treatment using video-based optical surface imaging (OSI)
Publikováno v:
Journal of Applied Clinical Medical Physics
Our goal is to determine an optimized image‐guided setup by comparing setup errors determined by two‐dimensional (2D) and three‐dimensional (3D) image guidance for head and neck cancer (HNC) patients immobilized by customized thermoplastic mask
Publikováno v:
Journal of Applied Clinical Medical Physics
Respiration-induced tumor motion during intensity-modulated radiotherapy (IMRT) of non-small-cell lung cancer (NSCLC) could cause substantial differences between planned and delivered doses. While it has been shown that, for conventionally fractionat
Autor:
D. Michael Lovelock, Gig S. Mageras, S Kriminski, Howard Amols, J Santoro, Hassan Mostafavi, Kenneth E. Rosenzweig
Publikováno v:
Medical Physics. 37:1237-1245
Digital tomosynthesis (DTS) with a linear accelerator-mounted imaging system provides a means of reconstructing tomographic images from radiographic projections over a limited gantry arc, thus requiring only a few seconds to acquire. Its application
Publikováno v:
Journal of Applied Clinical Medical Physics
A novel IMRT phantom was designed and fabricated using Acrylonitrile Butadiene Styrene (ABS) plastic. Physical properties of ABS plastic related to radiation interaction and dosimetry were compared with commonly available phantom materials for dose m
Autor:
H.M. Chan, Margie Hunt, Michael J. Zelefsky, Zvi Fuks, Oren Cahlon, Alison M. Shippy, Yoshiya Yamada, Howard Amols, Steven Greenstein
Publikováno v:
International Journal of Radiation Oncology*Biology*Physics. 71:330-337
To report toxicity and preliminary biochemical outcomes with high-dose intensity-modulated radiation therapy (IMRT) to a dose of 86.4 Gy for localized prostate cancer.Between August 1997 and March 2004, 478 patients were treated with 86.4 Gy using a