Results 371 to 380 of about 4,374,982 (417)

Recent Advances in Radiotherapy Treatment Planning

Cancer Investigation, 1991
Radiation treatment planning is currently in a state of rapid change. Dissatisfaction with past planning technology stems from the growing realization that: (1) Increases in the local regional tumor control rate will increase the cure rate in many malignancies. (2) Even at the best treatment centers geometric tumor misses are commonplace.
Eli Glatstein, Julian Rosenman, Edward L. Chaney, Scott Sailer, George W. Sherouse, Joel E. Tepper   +5 more
openaire   +3 more sources

Technical Note: MRI only prostate radiotherapy planning using the statistical decomposition algorithm.

Medical Physics (Lancaster), 2015
PURPOSE In order to enable a magnetic resonance imaging (MRI) only workflow in radiotherapy treatment planning, methods are required for generating Hounsfield unit (HU) maps (i.e., synthetic computed tomography, sCT) for dose calculations, directly from ...
C. Siversson, F. Nordström, Terese Nilsson, T. Nyholm, J. Jonsson, A. Gunnlaugsson, L. Olsson   +6 more
semanticscholar   +1 more source

CT simulation for radiotherapy treatment planning

The British Journal of Radiology, 2002
The present status of CT simulation (CT sim) hardware, software and practice is reviewed, particularly with regard to the changes that have taken place over the last 5 years. The latest technology is discussed together with some recently developed techniques.
J Conway, Edwin Aird
openaire   +3 more sources

Conformal Proton Radiotherapy Planning

2000
Conformal radiotherapy planning tries to match a tumoricidal dose to the target volume, including a safety margin. At the same time this dose distribution must deliver a radiation dose as low as possible to normal or radio-sensitive tissues. Planning is thus one of the centre pieces of proton radiotherapy.
Hans Breuer, Berend J. Smit
openaire   +2 more sources

Recent Advances in Radiotherapy Treatment Planning

Medical Dosimetry, 1988
The need for accurate treatment planning in radiation therapy arose as more powerful radiation technology became available. Computers now make it possible to use increasingly sophisticated dose calculation methods. Over the last two decades, modern imaging modalities, faster computer hardware, advanced graphics techniques, and new calculational ...
Daniel L. McShan, Allen S. Lichter, Benedick A. Fraass   +2 more
openaire   +3 more sources

Physics of Radiotherapy Planning and Delivery

2011
A solid foundation in the physics concepts used in the planning and delivery of the cancer patient’s radiation therapy is one of the fundamental cornerstones for the practice of radiation therapy. The essential concepts are discussed in this chapter, including a brief review of modern treatment machines, basic dosimetry parameters used in treatment ...
Philip Poortmans, Carlos A. Perez, James A. Purdy, Seymour H. Levitt   +3 more
openaire   +2 more sources

Spatio-Temporal Segmentation for Radiotherapy Planning

2010
This paper presents a segmentation method of 3D time-series images for radiotherapy planning. The aim of this study is to propose some techniques for the segmentation of tumors surrounding or contained in the lungs. The 4D images are produced using a respiration gating procedure and computed tomography.
Stawiaski, Jean, Decencière, Etienne, Bidault, François   +2 more
openaire   +3 more sources

The use of CT in radiotherapy treatment planning

Radiotherapy and Oncology, 1983
A prospective study is reported comparing conventional localisation with computed tomography (CT) localisation of tumours for radiotherapy treatment planning. One hundred and five out of 320 (33%) patients had an alteration in treatment plan and details are given according to the tumour site.
N.J. Hodson, R. P. Parker, H. Jane Dobbs, Pauline Hobday, Janet E. Husband, Janet E. Husband   +5 more
openaire   +2 more sources

Radiotherapy Treatment Planning for Testicular Seminoma

International Journal of Radiation Oncology*Biology*Physics, 2012
Virtually all patients with Stage I testicular seminoma are cured regardless of postorchiectomy management. For patients treated with adjuvant radiotherapy, late toxicity is a major concern. However, toxicity may be limited by radiotherapy techniques that minimize radiation exposure of healthy normal tissues.
Richard B. Wilder, Mark K. Buyyounouski, Clair J. Beard, Jason A. Efstathiou   +3 more
openaire   +3 more sources

The width of margins in radiotherapy treatment plans

Physics in Medicine and Biology, 2000
Publication of ICRU Reports 50 and 62 has highlighted the need to devise protocols for the process of drawing the planning target volume (PTV) around the clinical target volume (CTV). The margin surrounding the CTV should be wide enough to account for all geometric errors so that no part of the CTV accumulates a dose less than, for instance, 95% of ...
Marcel van Herk, Ben J. Mijnheer, Alan L McKenzie   +2 more
openaire   +3 more sources