Background and Aim: Beam shaper applicator is one of the dedicated applicators for intraoperative electron radiotherapy which is usually employed for large tumors irradiation. Due to the high weight and lack of possibility of direct placement on the patient's body, a considerable air gap exists ...
RADIOTHERAPYThe leakage characteristics of electron applicators on our Clinac 2500 linear accelerator have been measured. The leakage radiation in the patient plane and at the surface of the electron applicators has been measured for applicator sizes from 6 cm脳6 cm to 25 cm脳25 cm and beam ...
Results: The agreement between measured and calculated 50% PDD depth was within 卤2 mm for nearly all machine/energy/applicator combinations except the 6脳6 6 MeV beams on three machines where maximum difference was 3.8 mm. The calculated field width was larger than that of measured in most ...
2), the beam entry at the surface is sharply delineated by the applicator, creating a narrow penumbra. However, deeper within the tissue, the penumbra widens before the dose falls off sharply with depth. A wider penumbra implies that there is more coverage in the deeper areas compared to ...
A calibrated p-type silicon diode detector was used to measure the dose received by the patient in the centre of the field. Readings were corrected for energy, temperature and stand-off of the electron applicator from the patient surface. The mean difference between measured and prescribed dose ...
One certain strategy to increase therapeutic efficacy of radiation therapy is to advance radiation physics and the associated technology including improvements in distribution of radiation dose and radiation safety. This includes an increased accuracy of
关键词: Algorithms; Anisotropy; Electron beams; Linear accelerators; Photoelectrons; Photons; Radiotherapy; Anisotropic analytical algorithms; Clinical treatments; Cylindrical chambers; Flattening filters; Measurements of; Quality indices; Scanning systems; Tolerance interval; Monte Carlo methods; ...
a plane near the patient surface, and can replace the standard final aperture in an electron applicator. A further advantage is the ability of the flexible leaves to be positioned dynamically and remotely, enabling faster patient treatments and the use of IMRT techniques with electron radiotherapy....
4220866Electron applicator1980-09-02Taumann et al. 4157475Electron accelerator comprising a target exposed to the electron beam1979-06-05Stock et al.250/505 4121109Electron accelerator with a target exposed to the electron beam1978-10-17Taumann et al. ...
Intraoperative radiotherapyTreatment planningTreatment simulationElectronsIntraoperative electron beam radiation therapy (IOERT) involves a modified strategy of conventional radiation therapy and surgery. The lack of specific planning tools limits the spread of this technique. The purpose of the present study ...