نتایج جستجو برای: target volume delineation
تعداد نتایج: 707795 فیلتر نتایج به سال:
Radiotherapy is a localised treatment. The definition of tumour and target volumes for radiotherapy is vital to its successful execution. This requires the best possible characterisation of the location and extent of tumour. Diagnostic imaging, including help and advice from diagnostic specialists, is therefore essential for radiotherapy planning. There are three main volumes in radiotherapy pl...
BACKGROUND Delineation of the target volume is a time-consuming task in radiotherapy treatment planning, yet essential for a successful treatment of cancers such as prostate cancer. To facilitate the delineation procedure, the paper proposes an intuitive approach for 3D modeling of the prostate by slice-wise best fitting ellipses. METHODS The proposed estimate is initialized by the definition...
Radiotherapy treatment planning requires a localization of the tumor within the patient. This is challenging to accomplish for microscopic infiltrative spread of disease that is not visible on current imaging modalities. Prime examples for infiltrative tumors are gliomas. With the help of mathematical models, common growth characteristics of gliomas, which are known from histopathological studi...
Purpose: To compare tumour bed (TB) volumes delineated using MRI plus CT/clips (MRCT) with those delineated using CT/clips-alone in post-lumpectomy breast cancer patients positioned prone, and to determine the value of MRCT for planning partial breast radiotherapy (PBI). Materials/ Methods: 30 women with breast cancer each had 6-12 titanium-clips secured in the excision cavity walls at lumpecto...
BACKGROUND To validate a gradient-based segmentation method for gross tumor volume(GTV) delineation on (8)F-fluorothymidine (FLT)positron emission tomography (PET)/ computer tomography (CT) in esophageal squamous cell cancer through pathologic specimen, in comparison with standardized uptake values (SUV) threshold-based methods and CT. The corresponding impact of this GTV delineation method on ...
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