Zobrazeno 1 - 9
of 9
pro vyhledávání: '"John R. Zullo"'
Publikováno v:
Medical Dosimetry. 35:63-66
In the region of high-dose gradients at the end of the proton range, the stopping power ratio of the protons undergoes significant changes, allowing for a broad spectrum of proton energies to be deposited within a relatively small volume. Because of
Autor:
C. Martin, G. Ciangaru, Mingping Zhu, John R. Zullo, X. Ding, Michael Gillin, X. Ronald Zhu, Narayan Sahoo, B. Arjomandy, Richard Y. Wu
Publikováno v:
Medical Physics. 36:2269-2282
The number of proton and carbon ion therapy centers is increasing; however, since the publication of the International Commission on Radiation Units and Measurements report, there has been no dedicated report dealing with proton therapy quality assur
Publikováno v:
Medical Dosimetry. 29:118-121
Computed radiography (CR) plates are currently used in radiation therapy clinics to acquire digital radiographic images for the purpose of verifying the treatment field size, shape, and location. Each CR plate may be used numerous times, and the use
Autor:
Bijan, Arjomandy, Narayan, Sahoo, X Ronald, Zhu, John R, Zullo, Richard Y, Wu, Mingping, Zhu, Xiaoning, Ding, Craig, Martin, George, Ciangaru, Michael T, Gillin
Publikováno v:
Medical physics. 36(6)
The number of proton and carbon ion therapy centers is increasing; however, since the publication of the International Commission on Radiation Units and Measurements report, there has been no dedicated report dealing with proton therapy quality assur
Publikováno v:
Medical dosimetry : official journal of the American Association of Medical Dosimetrists. 32(4)
Computed tomography (CT) scanners are used in hospitals worldwide for radiation oncology treatment simulation. It is critical that the process very accurately represents the patient positioning to be used during the administration of radiation therap
Autor:
John R. Zullo, X. Ding, B. Arjomandy, Richard Wu, M. Zhu, Narayan Sahoo, Michael Gillin, Xiaorong Ronald Zhu
Publikováno v:
Medical Physics. 35:2995-2995
Purpose: Since the publication of ICRU‐59, there has not been any dedicated report constitute to proton therapy machine quality assurance (QA). We present a comprehensive machine QA program that is implemented at the proton therapy center in Housto
Publikováno v:
Medical Physics. 34:2424-2424
Purpose: Tuning nominal energies on linear accelerators is useful for matching machines of different vendors and for altering energies to match clinical needs. In this study we investigated matching a Varian 2100EX 4MeV electron beam to a Siemens Pri
Publikováno v:
Medical Physics. 34:2439-2439
Purpose: Measurements made in a proton beam indicated differences in dose calculated by the Eclipse (Varian, Milpitas, CA) treatment planning system and TLD measurements in a lung phantom. The differences were exceptionally large in the distal fall
Publikováno v:
Medical Physics. 33:2110-2110
Purpose: Advances in radiation therapy have increased the need for better patient positioning accuracy. We have measured and compared the degree of couch sag exhibited by various CTscanners at our institution, and have evaluated its implication. Meth