rachytherapy, the treatment of cancer patients by placing sealed radioactive elements at the short distances relative to the tumor, was born soon after Henri Becquerel’s discovery of radioactivity in Paris (1896) and Marie Curie’s discovery of radium (1898). However, within the past several years there have been great improvements in the technical aspect of the brachytherapy procedures (Blasko ...

TG-69 is a task group report of the AAPM on the use of radiographic film for dosimetry. Radiographic films have been used for radiation dosimetry since the discovery of x-rays and have become an integral part of dose verification for both routine quality assurance and for complex treatments such as soft wedges (dynamic and virtual), intensity modulated radiation therapy (IMRT), image guided rad...

Thoracic cancer treatment presents dosimetric difficulties due to respiratory motion and lung inhomogeneity. Monte Carlo and deformable image registration techniques have been proposed to be used in four-dimensional (4D) dose calculations to overcome the difficulties. This study validates the 4D Monte Carlo dosimetry with measurement, compares 4D dosimetry of different tumor sizes and tumor mot...

ABSTRACT Purpose: to conduct a literature review on the therapeutic effects of photobiomodulation applicable speech-language-hearing therapy. Methods: databases searched were Cochrane Library, Virtual Health Medical Literature Analysis and Retrieval System Online (MEDLINE) via PubMed, Web Science/ISI.The selected articles original ones whose abstracts available that evaluated effect in situatio...

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A new concept in the therapy of both neoplastic and non-neoplastic diseases is discussed in this article. Photodynamic therapy (PDT) involves light activation, in the presence of molecular oxygen, of certain dyes that are taken up by the target tissue. These dyes are termed photosensitizers. The mechanism of interaction of the photosensitizers and light is discussed, along with the effects prod...

This study compares the EPID dosimetry algorithms of two commercial systems for pretreatment QA, and analyzes dosimetric measurements made with each system alongside the results obtained with a standard diode array. 126 IMRT fields are examined with both EPID dosimetry systems (EPIDose by Sun Nuclear Corporation, Melbourne FL, and Portal Dosimetry by Varian Medical Systems, Palo Alto CA) and th...

In this study, a 4D dosimetry concept was developed. This concept included a method for calculation of 3D reference absorbed dose matrices at every control point of the delivery using a clinical treatment planning system (TPS). Further, the gamma evaluation method was extended to incorporate the 4 dimension of the TPS calculated dose distributions. The applications of the 4D dosimetry concept o...

Fricke gel dosimetry is a valuable method for in-phantom dose measurements in complex irradiation modalities like IMRT and BNCT. Implementation of this dosimetry technique requires dedicated instruments capable of measuring and further analysis immediately in situ at the radiation facility. This work presents a novel and integral dosimetry system aimed to attain portability requirements. The me...

background: over recent decades, modern protocols of external beam radio¬therapy and radiation techniques such as intensity-modulated radiotherapy (imrt) have been developed. these methods are extremely sensitive to errors in treatment delivery, so that it is essential to apply a high resolution 3d dosimetry system that has high sensitivity and is capable of measuring and verifying the complex ...