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B Brunelli

Publications and source records attributed to B Brunelli.

8 recordsLinked to original sources
PubMed1990

[Preliminary evaluation of the clinical use of a system for intraoperative radiotherapy with electrons (IORT)].

The preliminary evaluation of the dosimetric characteristics of a dedicated intraoperative electron beam therapy system is described (Bionix Corporation). The linear accelerator is the Varian 2100 C with electron beam energies of 6, 9, 12, 16 e 20 MeV. The isodose distribution for each of 15 available applicators (5 plane and 10 beveled) has been studied with a water phantom. The problems of the homogeneity of dose distribution, scattered and leakage radiation outside the applicators and X-ray contamination of the electron beams have been addressed, at the nominal 20 MeV energy for exemplification. The accurate knowledge of such physical and dosimetric properties are necessary for the implementation of the IORT techniques in terms of choice of the applicator size and electron beam energy for tumor coverage and dose sparing of critical organs.

Combined Modality Therapy↗
PubMed1990

[Physico-technical aspects of total skin irradiation with high-intensity-dose electrons].

The authors have addressed the physical and technical problems involved in the total skin irradiation with a linear accelerator Varian Clinac 2100 C expressly preset for this modality with electrons of 6 MeV nominal energy and dose rate of about 2500 UM/min at the isocenter. The six dual field technique has been implemented and the effect of interposed degrading filters has been evaluated with film dosimetry on an anthropomorphic phantom. It was verified that the total skin electron irradiation expressly offered by the manufacturer as an established treatment option on the Clinac 2100 C with high performance ionizing chambers and high dose rate makes the all procedure safer and simpler.

Electrons↗
PubMed1990

[Verification of 3 computerized systems for drafting a plan for treatment with electrons].

The electron beam treatment planning systems, with the availability of more and more developed hardware for complex calculation algorithms, need quality controls of accuracy and comparability of treatment plans from different systems. In this paper three systems have been evaluated; their similar computation algorithms (pencil beam) have been used but in some conditions (beam reconstruction, oblique incidence and dishomogeneity) different results have been drawn. The basic data (PDD, dose profile, etc.) were the same for every system, therefore it has been observed that different results are mainly due to differences in: a) input of parameter values, b) calculation algorithm approximations, c) image acquisitions and elaboration.

Electrons↗
PubMedDate not supplied

[Use of a personal computer in contrast evaluation in magnetic resonance tomography].

Contrast dependency in MR Tomography from several intrinsic and extrinsic parameters makes this technique versatile and sensitive; at the same time it makes more complex the image contrast evaluation and the optimized sequence choice. The approach to this problem from the viewpoint both of training and practical application becomes easier using the proposed personal computer program.

Computers↗