radiotherapy is one of the most common treatments of cancer that are used alone or with the combination of other treatments. radiotherapy are used before surgery for tumor shrinking, pain relief, wound healing or prevention of continues bleedings. in this paper, types of radiotherapy and safety principles for nurses are considered. there are three basic methods for radiotherapy: teletherapy, br...

background: in vivo dosimetry is a method for estimation of overall error in the delivered dose to the patients at the end of radiotherapy process. in this research, two methods for target dose calculation were evaluated on midline and central axis of photon beams in in vivo dosimetry of thorax fields. materials and methods: entrance and exit doses for anterior and lateral fields of thorax were...

Introduction Superficial X-ray therapy is one of the most important treatment methods in radiotherapy especially in the treatment of superficial skin lesions (Up to 300 kVp). Quality of the X-ray beam that can be expressed by Half-Value Layer (HVL), are important indices for this type of treatment effective energy of photon and Homogeneity Coefficient (HC). Materials and Methods The HC of the s...

Background: In vivo dosimetry is a method for estimation of overall error in the delivered dose to the patients at the end of radiotherapy process. In this research, two methods for target dose calculation were evaluated on midline and central axis of photon beams in in vivo dosimetry of thorax fields. Materials and Methods: Entrance and exit doses for anterior and lateral fields of thorax were...

Rapid advancements in imaging technology have led to remarkable improvements in identification and localization of tumors, ushering the era of high-precision techniques in contemporary radiotherapy practice. However, uncertainties in patient set-up and organ motion during a course of fractionated radiotherapy can compromise precision of radiation therapy. Excellent accuracy has been achieved wi...

Artificial intelligence (AI) applications have recently been proposed to detect errors in radiotherapy plans. External validation of such systems is essential assess their performance and safety before applying them clinical practice. We collected data from 5238 patients treated at Maastro Clinic introduced a range common plan for the model detect. estimated model’s discrimination by calculatin...

Monte Carlo dose calculations will potentially reduce systematic errors that may be present in currently used dose calculation algorithms. However, Monte Carlo calculations inherently contain random errors, or statistical uncertainty, the level of which decreases inversely with the square root of computation time. Our purpose in this study was to determine the level of uncertainty at which a lu...

The aim of this work was to evaluate whether the excising margin clinical tumor volume and planning target correspond with calculated radiation based on systematic errors, definition margins individual brain lobes. This research a retrospective cross-sectional study. We checked errors their average size margins. were in four directions: lateral, longitudinal, vertical, rotation. largest error l...