Results 111 to 120 of about 25,566 (154)
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High dose rate brachytherapy source measurement intercomparison
Australasian Physical & Engineering Sciences in Medicine, 2017This work presents a comparison of air kerma rate (AKR) measurements performed by multiple radiotherapy centres for a single HDR 192Ir source. Two separate groups (consisting of 15 centres) performed AKR measurements at one of two host centres in Australia.
Joel Poder +5 more
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Image‐guided high dose rate endorectal brachytherapy
Medical Physics, 2007Fractionated high dose rate endorectal brachytherapy (HDR‐EBT) using CT‐based treatment planning is an alternative method for preoperative down‐sizing and down‐staging of advanced rectal adeno‐carcinomas. The authors present an image guidance procedure that was developed to ensure daily dose reproducibility for the four brachytherapy treatment ...
Slobodan, Devic +6 more
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Optimization of planar high-dose-rate implants
International Journal of Radiation Oncology*Biology*Physics, 1999Brachytherapy has long been used to deliver localized radiation to the breast and other cancer sites. For interstitial implants, proper source positioning is critical in obtaining satisfactory dose distributions. The present work examines techniques for optimizing source guide placement in high-dose-rate (HDR) biplanar implants, and examines the ...
R D, Zwicker +4 more
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Prostate Brachytherapy: High Dose Rate
2012Prostate cancer is the most common male malignancy in the Western world. Over the past decade, a significant shift has taken place in stage at diagnosis, with most patients now presenting with localized disease. Options for treatment include radical prostatectomy and different radiation modalities including external beam radiotherapy, low-dose-rate ...
Carl Salembier, Peter Hoskin
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Afterloading high dose rate intracavitary vaginal cylinder
International Journal of Radiation Oncology*Biology*Physics, 1994To design an afterloading vaginal cylinder application appropriate to treat the vault with high dose rate (HDR) brachytherapy after prior total abdominal hysterectomy.A vaginal cylinder was designed and built using nylon and source loading channels positioned for source movement for HDR vault and vaginal brachytherapy.
Y, Maruyama, G, Ezzell, A T, Porter
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Endobronchial high dose rate brachytherapy
International Journal of Radiation Oncology*Biology*Physics, 1993Endobronchial brachytherapy for malignant airway obstructions has been used at several institutions using various radionuclides for decades. As small, high-activity, Iridium- 192 sources and remote afterloading systems became available, high dose rate (HDR) endobronchial irradiation became popular.
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High-dose-rate-Brachytherapie beim Risikoprostatakarzinom
Der Urologe, 2006Beim Prostatakarzinom ist zur Einschatzung des Therapieerfolgs hinsichtlich der rezidivfreien Zeit die Gruppierung in Niedrig-, Intermediar- und Hochrisikokarzinome sinnvoll. Die Trias PSA ≥10, Gleason-Score ≥7 und die klinische Tumorkategorie cT3 (extrakapsulares Tumorwachstum) sind bei der Einteilung hilfreich und einfach.
M. Schenck +9 more
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Photocurrent modeling at high dose rates
IEEE Transactions on Nuclear Science, 1989An analytical steady-state photocurrent model that includes ohmic field effects and treats (nonlinear) ambipolar diffusion and nonlinear recombination effects explicitly is developed. The nonlinear recombination and ambipolar diffusion are solved exactly, and the asymptotic ohmic field is treated as an approximate perturbation with fitted parameters ...
A.N. Ishaque +3 more
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High dose rate brachytherapy for prostate cancer
Cancer/Radiothérapie, 2008High dose rate (HDR) afterloading brachytherapy in the management of localised prostate cancer has practical, physical and biological advantages over low dose rate seed brachytherapy. There are no free live sources used, no risk of source loss and since the implant is a temporary procedure following discharge no issues with regard to radioprotection ...
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[High Dose Rate 192Ir-Microselectron].
Ugeskrift for laeger, 1990The HDR 192Ir-Microselectron is a new high-dose-rate remote afterloading apparatus using a small 192Ir source with very high activity, 370 GBq (10 Ci). The size of the source permits treatment through catheters with diameters as small as 1.9 mm. This makes it possible to give endobronchial treatment to lung-cancer patients through a fibrebronchoscope ...
J K, Bentzen +2 more
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