نتایج جستجو برای: TPS Verification

تعداد نتایج: 77984  

Journal: :journal of biomedical physics and engineering 0
s r mahdavi k keshavarzi e davani

objectives: the aim of this study was to verify the treatment planning systems (tpss). the next aim was to validate imsure qa software for patient-specific qa in radiotherapy clinics.  material and methods: we used imsure qa software (standard imaging, v 3.5) for verification of 92 non-imrt plans (540 fields) in 10 radiotherapy clinics. to validate the imsure, dose measurement was performed in ...

Journal: :iranian journal of medical physics 0
mahbobeh nazarnejad science and research branch, islamic azad university, tehran, iran

introduction dosimetric accuracy is a major issue in the quality assurance (qa) program for treatment planning systems (tps). an important contribution to this process has been a proper dosimetry method to guarantee the accuracy of delivered dose to the tumor. in brachytherapy (bt) of gynecological (gyn) cancer it is usual to insert a combination of tandem and ovoid applicators with a complicat...

Alireza Nikoofar Khadijeh Asnaashari Mahbobeh Nazarnejad, Mahdi Sadeghi Seied Rabi Mahdavi

Introduction Dosimetric accuracy is a major issue in the quality assurance (QA) program for treatment planning systems (TPS). An important contribution to this process has been a proper dosimetry method to guarantee the accuracy of delivered dose to the tumor. In brachytherapy (BT) of gynecological (Gyn) cancer it is usual to insert a combination of tandem and ovoid applicators with a complicat...

Introduction: Computerized treatment planning is a rapidly evolving modality that depends on hardware and software efficiency. Despite ICRU recommendations suggesting 5% deviation in dose delivery the overall uncertainty shall be less than 3.5% as suggested by B.J. Minjnheer. J. In house spreadsheets are developed by the medical physicists to cross-verify the dose calculated by the Treatment Pl...

2014
Jonas D. Fontenot

The purpose of this study was to assess the accuracy and efficacy of an automated treatment plan verification, or "secondary check", tool (Mobius3D), which uses a reference dataset to perform an independent three-dimensional dose verification of the treatment planning system (TPS) dose calculation and assesses plan quality by comparing dose-volume histograms to reference benchmarks. The accurac...

2014
Christopher L. Nelson Bryan E. Mason Ronald C. Robinson Kelly D. Kisling Steven M. Kirsner

A dose calculation verification system (VS) was acquired and commissioned as a second check on the treatment planning system (TPS). This system reads DICOM CT datasets, RT plans, RT structures, and RT dose from the TPS and automatically, using its own collapsed cone superposition/convolution algorithm, computes dose on the same CT dataset. The system was commissioned by extracting basic beam pa...

Mahmood Allahverdi, Micaeil Mollazadeh Mohammadreza Ay Nader Riahi Alam Tayyeb Allahverdi Pourfallah,

Introduction: GafChromic EBT films are one of the self-developing and modern films commercially available for dosimetric verification of treatment planning systems (TPSs). Their high spatial resolution, low energy dependence and near-tissue equivalence make them suitable for verification of dose distributions in radiation therapy. This study was designed to evaluate the dosimetric parameters of...

Journal: :Journal of cancer research and therapeutics 2008
Rajesh Kumar S D Sharma C Vijaykumar Sudesh Deshpande P K Sharma S Vandana A Philomena Ravi H Chilkulwar

AIM To evolve a fast dose verification method for high-dose-rate (HDR) brachytherapy treatment plans and to demonstrate its applicability in different clinical cases. MATERIALS AND METHODS We developed a software tool in VC++ for the Varisource HDR unit for HDR dosimetry plan verification using TG-43 parameters. HDR treatment dosimetry of a number clinical cases using Varisource was verified ...

Journal: :iranian journal of medical physics 0
micaeil mollazadeh m.sc. student in medical physics, medical physics and engineering dept., tehran university of medical sciences, tehran, iran. mahmood allahverdi associate professor, medical physics and engineering dept., tehran university of medical sciences, tehran, iran. tayyeb allahverdi pourfallah assistant professor, biochemistry and biophysics dept., mazandaran university of medical sciences, sari, iran. nader riahi alam associate professor, medical physics and engineering dept., tehran university of medical sciences, tehran, iran. mohammadreza ay associate professor, medical physics and engineering dept., tehran university of medical sciences, tehran, iran.

introduction: gafchromic ebt films are one of the self-developing and modern films commercially available for dosimetric verification of treatment planning systems (tpss). their high spatial resolution, low energy dependence and near-tissue equivalence make them suitable for verification of dose distributions in radiation therapy. this study was designed to evaluate the dosimetric parameters of...

Journal: :Medical physics 2005
S Steciw B Warkentin S Rathee B G Fallone

A three-dimensional (3D) intensity-modulated radiotherapy (IMRT) pretreatment verification procedure has been developed based on the measurement of two-dimensional (2D) primary fluence profiles using an amorphous silicon flat-panel electronic portal imaging device (EPID). As described in our previous work, fluence profiles are extracted from EPID images by deconvolution with kernels that repres...

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