نتایج جستجو برای: radiotherapy treatment planning

تعداد نتایج: 1609874  

2016
Catur Edi Widodo Kusworo Adi Aris Sugiharto Adi Pamungkas

Radiotherapy is a tumor treatment process using high dose of radiation. Hence, it is essential that radiotherapy is carefully planned with a Treatment Planning System (TPS). The first step in TPS is delineation that aims to get a better picture of the tumor and the target volume value. This research investigated volume target delineation for brain tumor against the MRI image of the head in axia...

A. Chakraborty, A. Shiva B, B. Goswami, P. Goswami, P. Kumari, P. Nagendran, S. Banerjee, S. Mitra, S. Mukherjee,

Background: Identify the optimal technique of radiotherapy for patients with high grade glioma. Our initial year of experience with RapidArc radiation therapy. Materials and Methods: Planning CT scans of 50 patients with grade IV glioma were reviewed and three plan sets by 3D Conformal Radiotherapy (3DCRT), Intensity Modulated Radiotherapy (IMRT) and Rapid Arc (RA) were generated and the plans ...

Journal: :Anales del sistema sanitario de Navarra 2009
S Pellejero S Lozares F Mañeru

Both the planning systems and the form of administering radiotherapy have changed radically since the introduction of 3D planning. At present treatment planning based on computerised axial tomography (CAT) images is standard practice in radiotherapy services. In recent years lineal accelerators for medical use have incorporated technology capable of administering intensity modulated radiation b...

Journal: :Cancer Imaging 2004
Neil G Burnet Simon J Thomas Kate E Burton Sarah J Jefferies

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...

2017
Robert A Mitchell Philip Wai Ruth Colgan Anna M Kirby Ellen M Donovan

OBJECTIVES To reduce treatment planning times while maintaining plan quality through the introduction of semi-automated planning techniques for breast radiotherapy. METHODS Automatic critical structure delineation was examined using the Smart Probabilistic Image Contouring Engine (SPICE) commercial autosegmentation software (Philips Radiation Oncology Systems, Fitchburg, WI) for a cohort of t...

Journal: :Clinical medicine & research 2007
Ashesh B Jani Stanley L Liauw Michael J Blend

Indium-111 radioimmunoscintigraphy (RIS) has an increasing role in the treatment of prostate cancer and is most commonly performed at this disease site using labeled monoclonal antibody against prostate-specific membrane antigen. There are many limitations of RIS, including low spatial resolution, low diagnostic yield and limited availability. Despite these limitations, the efficacy of RIS has ...

Ahmadreza Sebzari Fathollah Bouzarjomehri Kaveh Shirani Tak Abi Malihe Rezaie Yazdi Maryam Rezaie Yazdi Narges Kheirollahi Payam Izadpanahi

Introduction: The functionality and quality of any treatment planning system (TPS) strongly depends on the type of Algorithm which is used by it. Obviously, the role of dose distribution algorithms in calculation of prescribed dose inside the tumor in modern radiotherapy techniques has more important than past to achieve the best clinical outcomes, especially in tumors which ar...

Journal: :journal of paramedical sciences 0
naeema navvabpour expert in mineral medicinal chemistry, sistan and baluchestan university, mineral chemistry department, sistan and baluchestan, iran. fariborz faeghi department of radiation technology, paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran mohamad navabpour material engineer, science and technology university material and metallurgy faculty , tehran university, tehran, iran.

radiation therapy is considered as one of the main methods in cancer treatment. in this method, determination of exact location and geometric properties of tumor is necessary for treatment planning that leads to increased accuracy and output of treatment and reduction of healthy tissue dose. for this purpose, the aim of the present study has been physiological transmission of gallium as a pharm...

2014
Benjamin Mou Chris J. Beltran Sean S. Park Kenneth R. Olivier Keith M. Furutani

Stereotactic ablative radiotherapy is being increasingly adopted in the treatment of lung tumors. The use of proton beam therapy can further reduce dose to normal structures. However, uncertainty exists in proton-based treatment plans, including range uncertainties, large sensitivity to position uncertainty, and calculation of dose deposition in heterogeneous areas. This study investigated the ...

2016
Yuan Feng Carlton Chu Jeffrey De Fauw Nenad Tomasev Rosalind Raine Kevin Sullivan Syed Moinuddin Julien Cornebise Joseph Ledsam

Radiotherapy is one of the main ways head and neck cancers are treated; radiation is used to kill cancerous cells and prevent their recurrence. Complex treatment planning is required to ensure that enough radiation is given to the tumour, and little to other sensitive structures (known as organs at risk) such as the eyes and nerves which might otherwise be damaged. This is especially difficult ...

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