Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Edwin C. McCullough"'
Publikováno v:
International Journal of Radiation Oncology*Biology*Physics. 48:1623-1634
Purpose: The purpose of this study was to quantify and develop methods to decrease inhomogeneities created with field edge mismatch when using a mono-isocentric beam-split technique. Methods and Materials: We validated techniques to determine dose ac
Publikováno v:
Medical Physics. 24:1714-1728
We have developed a convolution/superposition method to calculate dose distributions in photon treatment fields with beam modifiers such as physical wedges. The dose component due to wedge generated radiation was accounted for by using an extended ph
Publikováno v:
Medical Physics. 24:1515-1519
This paper investigates measuring dose distributions for enhanced dynamic wedges (EDWs) using a commercial multichamber detector array. The technical aspects of using the chamber array, including chamber calibration, selection of measurement paramete
Autor:
Christopher G. Soares, Ann H. Maitz, J. A. Sayeg, Edwin C. McCullough, William L. McLaughlin, Robert W. Kline, Andrew Wu
Publikováno v:
Medical Physics. 21:379-388
The measurement of absorbed dose as well as dose distributions (profiles and isodose curves) for small radiation fields (as encountered in stereotactic surgery) has been difficult due to the usual large detector size or densitometer aperture (1 mm) r
Publikováno v:
American Journal of Clinical Oncology. 22:147-149
Intraoperative radiotherapy is a treatment option for some patients with locally advanced malignancies. This report updates the Mayo Clinic experience in more than 800 patients by analyzing the use of electron energy and cone size and shape by diseas
Publikováno v:
Medical physics. 27(4)
Dose per monitor unit in photon fields generated by clinical linear accelerators can be affected by the backscattered radiation into the monitor chamber from collimator jaws. Thus, it is necessary to account for the backscattered radiation in computi
Autor:
Edwin C. McCullough, Peter J. Biggs
Publikováno v:
Intraoperative Irradiation ISBN: 9781475755763
In intraoperative electron-beam irradiation (IOERT), a single dose of radiation (e.g., 10–20 Gy) is delivered to a selectively defined volume of tissue. Usually, the IOERT treatment is a boost therapy added to another course of treatment using stan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75d961095d983d5a4d20dddadf115dc9
https://doi.org/10.1007/978-1-59259-696-6_3
https://doi.org/10.1007/978-1-59259-696-6_3
Publikováno v:
Medical Physics. 17:103-105
A quality assurance protocol has been developed to assess the relative accuracy of computerized monitor unit calculations. Results from this testing reveal that errors (defined as the difference between the computer results and those obtained using a
Publikováno v:
Medical Dosimetry. 15:137-139
A recent change in the source-to-blocking tray distance on at least one new linear accelerator restricts simultaneous use of the vendor supplied oversized (i.e., 20 cm) 45° steel wedge and 7.5 cm or higher custom cerrobend blocks. Truncating the “
Publikováno v:
Medical physics. 25(1)
A convolution/superposition based method was developed to calculate dose distributions and wedge factors in photon treatment fields generated by dynamic wedges. This algorithm used a dual source photon beam model that accounted for both primary photo