In radiosurgery, a moving beam of radiation acts as an ablative surgical instrument. Conventional systems for radiosurgery use a cylindrical radiation beam of fixed cross section. The radiation source can be moved only along simple, standardized paths. A new radiosurgical system based on a six-degree-of-freedom robotic arm has been developed to overcome limitations of conventional systems. We a...

In radiosurgery, a moving beam of radiation acts as an ablative surgical instrument. Conventional systems for radiosurgery use a cylindrical radiation beam of xed cross-section. The radiation source can only be moved along simple standardized paths. A new radiosurgical system based on a six degree-of-freedom robotic arm has been developed to overcome limitations of conventional systems. We addr...

Stephenson and Wiley demonstrate that three-dimensional (3D) CT-based simulation is an improvement in the simulation process. The growing importance of CT in radiation oncology treatment planning has been discussed previously [1] and is further emphasized in this article. The advantages of geometric optimization in three dimensions for radiation therapy treatment planning also are described. Th...

In recent years, the sophistication and complexity of clinical treatment planning and treatment planning systems has increased significantly, particularly including three-dimensional (3D) treatment planning systems, and the use of conformal treatment planning and delivery techniques. This has led to the need for a comprehensive set of quality assurance (QA) guidelines that can be applied to cli...

Intensity-modulated radiation therapy (IMRT) allows for the design of customized, highly-conformal treatments cancer patients. Creating IMRT treatment plans, however, is a mathematically complex process, which often tackled in multiple, simpler stages. This sequential approach typically separates dose requirements from mechanical deliverability considerations, may result suboptimal quality. For...

Introduction: Receiving exact dose by the patients is vital in radiotherapy. In radiation therapy, the dosimetry of radiations is too important because of successful radiation inquires for delivering the exact dose to the target volume. This study is to evaluate the tolerances and the accuracy of calculated dose of photon beams in the treatment software system. The TECDOC1583 p...