نتایج جستجو برای: Ophthalmic Plaques

تعداد نتایج: 35465  

Journal: :iranian journal of medical physics 0
zohreh dehghannia rostami graduated m.sc. student of nuclear physics, physics dept., kn toosi university of technology, tehran, iran. seyed farhad masoudi associate professor, physics dept., kn toosi university of technology, tehran. iran somayeh asadi graduated m.sc. student of nuclear physics, physics dept., kn toosi university of technology, tehran, iran.

introduction: in this paper, by complete definition of human eye containing the various parts and their materials, the difference between this model and a homogeneous water phantom are compared for two ophthalmic plaques using 125i and 103pd. material and methods: the simulation of the two phantoms were performed in the mcnp-4c code and by using the geometry of a three-dimensional eye, differen...

Seyed Farhad Masoudi, Somayeh Asadi, Zohreh Dehghannia Rostami

Introduction: In this paper, by complete definition of human eye containing the various parts and their materials, the difference between this model and a homogeneous water phantom are compared for two ophthalmic plaques using 125I and 103Pd. Material and methods: The simulation of the two phantoms were performed in the MCNP-4C code and by using the geometry of a three-dimensional eye, differen...

Ali Asghar Mowlavi Mejed Yazdani

  BEBIG Ruthenium-106 ophthalmic plaques have been used for treatment of uveal melanoma, retinoblastoma, melanoma of the iris and other special applications for many years. The plaques consist of a thin film of 106Ru, a beta emitter, encapsulated in pure silver. The present work proposes a new mathematical eye model for ophthalmic brachytherapy dosimetry. This new mod...

Journal: :iranian journal of nuclear medicine 2008
ali asghar mowlavi mejed yazdani

bebig ruthenium-106 ophthalmic plaques have been used for treatment of uveal melanoma, retinoblastoma, melanoma of the iris and other special applications for many years. the plaques consist of a thin film of 106ru, a beta emitter, encapsulated in pure silver. the present work proposes a new mathematical eye model for ophthalmic brachytherapy dosimetry. this new model includes detailed descript...

Azam Jannati Isfahan Gholamreza Raisali Parvaneh shokrani,

Introduction: Ophthalmic plaque radiotherapy using I-125 radioactive seeds in removable episcleral plaques is often used in management of ophthalmic tumors. Radioactive seeds are fixed in a gold bowl-shaped plaque and the plaque is sutured to the scleral surface corresponding to the base of the intraocular tumor. This treatment allows for a localized radiation dose delivery to the tumor with a ...

Journal: :iranian journal of medical physics 0
azam jannati isfahan m.sc. student of medical physics, faculty of medicine, isfahan university of medical sciences, isfahan, iran. parvaneh shokrani associate professor, medical physics dept., faculty of medicine, isfahan university of medical sciences, isfahan, iran. gholamreza raisali associate professor, radiation application research school, nuclear science and technology research institute, atomic energy organization of iran, tehran, iran

introduction: ophthalmic plaque radiotherapy using i-125 radioactive seeds in removable episcleral plaques is often used in management of ophthalmic tumors. radioactive seeds are fixed in a gold bowl-shaped plaque and the plaque is sutured to the scleral surface corresponding to the base of the intraocular tumor. this treatment allows for a localized radiation dose delivery to the tumor with a ...

2009
Ali Asghar Mowlavi Majed Yazdani

BEBIG Ruthenium-106 ophthalmic plaques have been used for treatment of uveal melanoma, retinoblastoma, melanoma of the iris and other special applications for many years. The plaques consist of a thin film of Ru, a beta emitter, encapsulated in pure silver. The present work proposes a new mathematical eye model for ophthalmic brachytherapy dosimetry. This new model includes detailed description...

ژورنال: سنجش و ایمنی پرتو 2019

Understanding the dose distribution of beta-emitting eye plaques respect to the location of tumor is of importance. In this study, the geometry of CCB, COB and CIB plaques (BEBIG manufacturer) for specific eye tumors were simulated and the effects of different coated radionuclides and plaque materials were investigated, by Geant4 simulation toolkit. For validation, a dosimetric investigation wa...

Journal: :International journal of radiation oncology, biology, physics 2012
Gaurav Marwaha Allan Wilkinson James Bena Roger Macklis Arun D Singh

PURPOSE To determine whether the computed dosimetry of a new ophthalmic plaque, EP917, when compared with the standard Collaborative Ocular Melanoma Study (COMS) plaques, could reduce radiation exposure to vision critical structures of the eye. METHODS AND MATERIALS One hundred consecutive patients with uveal melanoma treated with COMS radiation plaques between 2007 and 2010 were included in ...

2017
Elena Garcia-Martin Erika Ruiz-de Gopegui Montserrat León-Latre Sofia Otin Irene Altemir Vicente Polo Jose M Larrosa Marta Cipres Jose A Casasnovas Luis E Pablo

OBJECTIVE To assess changes in the retinal nerve fiber layer (RNFL) and macula in subjects with cardiovascular risk factors or subclinical ischemia. DESIGN Prospective and observational study. METHODS A total of 152 healthy men underwent cardiovascular examination, including quantification of subclinical atheroma plaques by artery ultrasound scans, blood analysis, and a complete ophthalmic ...

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