UNLABELLED This study is a retrospective analysis of 124 differentiated thyroid cancer patients who underwent dosimetric evaluation using MIRD methodology over a period of 15 y. The objectives of the study were to demonstrate the clinical use of dosimetry-guided radioactive iodine ([RAI] (131)I) treatment and the safe and effective application of a 3-Gy bone marrow (BM) dose in patients with di...

Background: Adjuvant chemoradiotherapy is the standard treatment for gastric carcinoma, but optimal radiation modality remains uncertain. This study aimed to compare intensity-modulated radiotherapy (IMRT) and three-dimensional conformal (3D-CRT) in terms of dosimetry adjuvant cancer treatment. Methods: 21 patients with stage IIB-IIIC cancer, treated between January June 2021, underwent surgery...

Although much literature has been devoted to portal dosimetry with the Varian amorphous silicon (aSi) portal imager, the majority of the described methods are not routinely adopted because implementation procedures are cumbersome and not within easy reach of most radiotherapy centers. To make improved portal dosimetry solutions more generally available, we have investigated the possibility of c...

Background: Accurate voxel phantom is needed for dosimetric simulation in radiation therapy for malignant tumors in female pelvic region. However, most of the existing voxel phantoms are constructed on the basis of Caucasian or non-Chinese population. Materials and Methods: A computational framework for constructing female pelvic voxel phantom for radiation dosimetry was performed base...

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In this work gold nanoparticles (AuNP) were embedded in MAGIC-f gel and irradiated in a 250 kV x-ray clinical beam. The signal of non-irradiated gel samples containing AuNPs showed maximum difference of 0.5% related to gel without nanoparticles. Different AuNPs concentrations were studied: 0.10 mM, 0.05 mM and 0.02 mM, presenting dose enhancements of 106%, 90% and 77% respectively. Monte Carlo ...

The article provides a sequence of steps for using RISØ calorimeters calibration and subsequent use B3 radiochromic film dosimeters (GEX corporation) scanner measuring absorbed doses. Calibration was carried out with the help electron beam accelerator in range doses 3 – 40 kGy (measurement calorimeters). In course work, following out: dosimetry films calorimeters; plotting curve dosimetric film...

Radio frequency (RF) dosimetry is the quantification of the magnitude and distribution of absorbed electromagnetic energy within biological objects that are exposed to RF fields. At RF, the dosimetric quantity, which is called the specific absorption rate (SAR), is defined as the rate at which energy is absorbed per unit mass. The SAR is determined not only by the incident electromagnetic waves...

Purpose: Planning and dosimetry of different VMAT algorithms (SmartArc, Ergo++, Autobeam) is compared with IMRT for Head and Neck Cancer patients. Modelling was performed to rule out the causes of discrepancies between planned and delivered dose. Methods: Five HNC patients previously treated with IMRT were re-planned with SmartArc (SA), Ergo++ and Autobeam. Plans were compared with each other a...

Treatment of moving targets can result in local over and under dosage due to interference effects of the beam application and the motion of the target, so called interplay. Rescanning is one option to mitigate effects of tumor motion in scanned particle therapy [1, 2]. Rescanning is based on statistical methods that show that the dosimetric effect of interplay will average and lead to a homogen...