We would like to determine the effectiveness of image-guided radiotherapy (IGRT) to reduce laryngeal edema following treatment for head and neck cancer and to assess patient perception of voice and speech after treatment. We conducted a retrospective review of 44 patients undergoing radiation for non-laryngeal and non-hypopharyngeal head and neck cancers. Endoscopic and/or mirror examinations o...

Purpose: To assess the relevance of focus to skin distance (FSD) measurements for patients with intraprostatic gold seeds using an image guided radiation therapy (IGRT) protocol. The second aim of this study was to analyse the frequency and nature of isocentre shifts made during a course of treatment for patients with prostate cancer. Additionally, the impact of isocentre shifts on dosimetry, r...

Technological advancement has facilitated patient-specific radiotherapy in bladder cancer. This been made possible by developments image-guided (IGRT). Particularly transformative the integration of volumetric imaging into workflow. The ability to visualise target using cone beam computed tomography and magnetic resonance initially assisted with determining magnitude inter- intra-fraction chang...

In intensity-modulated radiation therapy (IMRT) and volumetric-modulated arc therapy (VMAT), the use of posterior oblique beams has become common. Beam attenuation by the treatment couch is not negligible when the couch is in the beam portal. In this study, we established the relationship of relative dose vs. beam angle for two Varian 21EX linacs, one equipped with the Exact couch (standard cou...

BACKGROUND Image-guided radiotherapy used multiple imaging during the radiation therapy course to improve the precision and accuracy of health care provider's treatment. OBJECTIVES This study aims to assess the safety, effectiveness and economic aspects of image-guided radiation therapy for decision-making about this technology in Iran. METHODS In this study, the most important medical data...

In the last decades the status of radiotherapy was tremendously increased in terms of conformity to the target as well as image-guided techniques in conjunction with intensity-modulated radiotherapy (IMRT). The technological improvement had a significant clinical outcome for better response and lower toxicity to the surrounding normal tissues. Nowadays the incidence of rectal toxicity has been ...

The objective of this study was to compare the effects of image-guided hypofractionated radiotherapy and conventional fractionated radiotherapy on non-small-cell lung cancer (NSCLC). Fifty stage- and age-matched cases with NSCLC were randomly divided into two groups (A and B). There were 23 cases in group A and 27 cases in group B. Image-guided radiotherapy (IGRT) and stereotactic radiotherapy ...

BACKGROUND To evaluate the acute tolerance to hypofractionated schedule of patients with prostate cancer. PATIENTS AND METHODS We treated 62 patients with intermediate risk prostate cancer. All patients were treated with a total dose of 43.8 Gy on seminal vesicles and 54.75 Gy on prostate, 3.65 Gy per fraction, three times a week for a total of 5 weeks. All patients underwent neoadjuvant, con...

Three dimensional radiation dosimetry has received growing interest with the implementation of highly conformal radiotherapy treatments. The radiotherapy community faces new challenges with the commissioning of image guided and image gated radiotherapy treatments (IGRT) and deformable image registration software.A new three dimensional anthropomorphically shaped flexible dosimeter, further call...

Imaging plays a vital role in radiation therapy and with recent advances in technology considerable emphasis has been placed on cone-beam CT (CBCT). Attaching a kV x-ray source and flat panel detector directly to the linear accelerator gantry has enabled progress in target localization techniques, which can include daily CBCT set-up scans for some treatments. However, with an increasing number ...