نتایج جستجو برای: imaging radiotherapy planning

تعداد نتایج: 700763  

Journal: :International Journal of Radiation Oncology*Biology*Physics 2019

2014
Eduardo Rosenblatt

Countries, states, and island nations often need forward planning of their radiotherapy services driven by different motives. Countries without radiotherapy services sponsor patients to receive radiotherapy abroad. They often engage professionals for a feasibility study in order to establish whether it would be more cost-beneficial to establish a radiotherapy facility. Countries where radiother...

Journal: :Physics in medicine and biology 2015
Maria A Schmidt Geoffrey S Payne

The use of magnetic resonance imaging (MRI) in radiotherapy (RT) planning is rapidly expanding. We review the wide range of image contrast mechanisms available to MRI and the way they are exploited for RT planning. However a number of challenges are also considered: the requirements that MR images are acquired in the RT treatment position, that they are geometrically accurate, that effects of p...

2014
Małgorzata Moszyńska-Zielińska Justyna Chałubińska-Fendler Leszek Gottwald Leszek Żytko Ewelina Bigos Jacek Fijuth

The increasing incidence of obesity in Poland and its relation to endometrioid endometrial cancer (EEC) is resulting in the increasing necessity of treating obese women. Treatment of an overweight patient with EEC may impede not only the surgical procedures but also radiotherapy, especially external beam radiotherapy (EBRT). The problems arise both during treatment planning and when delivering ...

Journal: :Applied sciences 2021

Radiotherapy dose calculation requires accurate Computed Tomography (CT) imaging while tissue delineation may necessitate the use of contrast agents (CA). Acquiring these two sets is a common practice in radiotherapy. This study aims to evaluate effect CA on calculations. Two hundred and twenty-six volumetric modulated arc therapy (VMAT) patients that had planning CT with (CCT) non-contrast (NC...

2017
Jessica Zhou

Stereotactic radiosurgery (SRS) involves the delivery of a very precise, focal dose of radiation to a target. Radiologic imaging is crucial for accurate delineation of the treatment volume in order to achieve maximal dose to the target and optimal sparing of the normal surrounding tissue. Conventional imaging refl ects only anatomic rather than functional properties of the tumor. In contrast, m...

2010
Laura A. Dawson Cynthia Ménard

An inherent goal of radiation therapy is to deliver enough dose to the tumor to eradicate all cancer cells or to palliate symptoms, while avoiding normal tissue injury. Imaging for cancer diagnosis, staging, treatment planning, and radiation targeting has been integrated in various ways to improve the chance of this occurring. A large spectrum of imaging strategies and technologies has evolved ...

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