نتایج جستجو برای: intravascular brachytherapy
تعداد نتایج: 24513 فیلتر نتایج به سال:
OBJECTIVES The aim of this article is to underline the importance of this complication after endovascular brachytherapy (EVBT) and intravascular stenting of the femoropopliteal arteries occurring in a running randomized trial. BACKGROUND Endovascular brachytherapy has been proposed as a promising treatment modality to reduce restenosis after angioplasty. However, the phenomenon of late acute ...
BACKGROUND Intravascular brachytherapy is being applied more and more in patients with coronary artery disease for the prevention of restenosis subsequent to balloon angioplasty, in particular after stent implantation. Several radiation sources (beta- and gamma-emitters) are available in clinical routine. It was the purpose of this study to compare the radiation doses at the level of the advent...
Background and Objective: The most common intravascular brachytherapy sources include 32P, 188Re, 106Rh and 90Sr/90Y. In this research, skin absorbed dose for different covering materials in dealing with these sources were evaluated and the best covering material for skin protection and reduction of absorbed dose by radiation staff was recognized and recommended.Method: Four materials including...
Intravascular brachytherapy is simulated with Palmaz-Schatz stent, manufactured by Cordis Co. that is radioactived with 188Re source, using the MCNPX code. Functions and dosimetric parameters, were calculated in cylindrical coordinates and results compared with the latest standards and AAPM TG-60 group offers, published experimental data and also other performed simulations with various p...
Since the publication of AAPM Task Group 60 report in 1999, a considerable amount of dosimetry data for the three coronary brachytherapy systems in use in the United States has been reported. A subgroup, Task Group 149, of the AAPM working group on Special Brachytherapy Modalities (Bruce Thomadsen, Chair) was charged to develop recommendations for dose calculation formalisms and the related con...
A new high dose rate 20 mm 32P intravascular brachytherapy (IVB) beta source used with automated stepping has recently been introduced. The AAPM Task Group 60 recommends that beta IVB sources should have well characterized dosimetric parameters in water. In this study, Monte Carlo simulations (MCNPX v 2.4) were used to derive these parameters for a 2 mm source segment rather than the entire 20 ...
At SSDLs the recommended detector for the calibration of all brachytherapy photon sources, as well as for the calibration of intravascular beta sources, is an appropriately calibrated well type chamber. For SSDLs the preferred method for traceability in the source calibrations is to have the well type chamber calibrated against the primary standard at the PSDL. However, due to practical reasons...
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