Results 251 to 260 of about 70,168 (300)
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2021
The role of radiation therapy (RT) in the treatment of liver malignancies has historically been low, in part due to challenges in delivering ablative doses of RT safely while respecting the radiation dose limits of numerous normal tissues in the upper abdomen, including the liver itself. Challenges to the routine use of RT to treat hepatic malignancies
Pablo Munoz-Schuffenegger +2 more
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The role of radiation therapy (RT) in the treatment of liver malignancies has historically been low, in part due to challenges in delivering ablative doses of RT safely while respecting the radiation dose limits of numerous normal tissues in the upper abdomen, including the liver itself. Challenges to the routine use of RT to treat hepatic malignancies
Pablo Munoz-Schuffenegger +2 more
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Implementation of Image-guided Radiotherapy
Clinical Oncology, 2012Imaged-guided radiotherapy (IGRT) is not a new technique; rather, it has evolved over the past few decades. It has been defined in many ways, but for the purposes of this Editorial it can be thought of as any imaging at pretreatment and delivery, the result of which is acted upon, that improves or verifies the accuracy of radiotherapy. Although imaging
K N, Franks, H A, McNair
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Dynamic targeting image-guided radiotherapy
Medical Dosimetry, 2006Volumetric imaging and planning for 3-dimensional (3D) conformal radiotherapy and intensity-modulated radiotherapy (IMRT) have highlighted the need to the oncology community to better understand the geometric uncertainties inherent in the radiotherapy delivery process, including setup error (interfraction) as well as organ motion during treatment ...
Calvin, Huntzinger +14 more
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Different Styles of Image-Guided Radiotherapy
Seminars in Radiation Oncology, 2007To account for geometric uncertainties during radiotherapy, safety margins are applied. In many cases, these margins overlap organs at risk, thereby limiting dose escalation. The aim of image-guided radiotherapy is to improve the accuracy by imaging tumors and critical structures on the machine just before irradiation.
Van Herk, Marcel, van Herk, Marcel
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Cancer radiotherapie : journal de la Societe francaise de radiotherapie oncologique, 2008
Recent advances in radiation oncology are based on improvement in dose distribution thanks to IMRT and improvement in target definition through new diagnostic imaging such as spectroscopic or functional MRI or PET. However, anatomic variations may occur during treatment decreasing the benefit of such optimization.
R, de Crevoisier +7 more
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Recent advances in radiation oncology are based on improvement in dose distribution thanks to IMRT and improvement in target definition through new diagnostic imaging such as spectroscopic or functional MRI or PET. However, anatomic variations may occur during treatment decreasing the benefit of such optimization.
R, de Crevoisier +7 more
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A review of image-guided radiotherapy
Radiological Physics and Technology, 2009Image-guided radiotherapy (IGRT) is in the midst of a strong development and implementation cycle, stimulated by pioneering work performed in Japan. We present a review of the rationale, technology, and methodology of image guidance, as well as an overview of current work in IGRT at the Massachusetts General Hospital. The technology is rapidly evolving,
George T Y, Chen +2 more
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Cancer radiotherapie : journal de la Societe francaise de radiotherapie oncologique, 2017
The IGRT is described in its various equipment and implementation. IGRT can be based either on ionizing radiation generating 2D imaging (MV or kV) or 3D imaging (CBCT or MV-CT) or on non-ionizing radiation (ultrasound, optical imaging, MRI or radiofrequency). Adaptive radiation therapy is then presented in its principles of implementation. The function
R, de Crevoisier +5 more
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The IGRT is described in its various equipment and implementation. IGRT can be based either on ionizing radiation generating 2D imaging (MV or kV) or 3D imaging (CBCT or MV-CT) or on non-ionizing radiation (ultrasound, optical imaging, MRI or radiofrequency). Adaptive radiation therapy is then presented in its principles of implementation. The function
R, de Crevoisier +5 more
openaire +1 more source
2009
Image guided radiation therapy (IGRT) is currently one of the most active research fields in medical physics. The recent development of high precision dose delivery techniques with high energy photon and hadron beams can only be fully exploited if we confidently know the shape and location of radiation targets and the organs at risk at the time of the ...
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Image guided radiation therapy (IGRT) is currently one of the most active research fields in medical physics. The recent development of high precision dose delivery techniques with high energy photon and hadron beams can only be fully exploited if we confidently know the shape and location of radiation targets and the organs at risk at the time of the ...
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Advanced Image-Guided External Beam Radiotherapy
2008The goal of radiation therapy is to eradicate tumor stem cells while sparing healthy tissue. Therefore, the first aim must be to delineate tumor from healthy tissue. Advanced imaging techniques will enable one to reduce the uncertainty of microscopic extension of disease.
Thomas Rockwell, Mackie, Wolfgang, Tomé
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Image-guided radiotherapy: rationale, benefits, and limitations
The Lancet Oncology, 2006Technological advances have greatly enhanced the specialty of radiation oncology by allowing more healthy tissue to be spared for the same or better tumour coverage. Developments in medical imaging are integral to radiation oncology, both for design of treatment plans and to localise the target for precise administration of radiation.
Laura A, Dawson, Michael B, Sharpe
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