Zobrazeno 1 - 10
of 42
pro vyhledávání: '"V F, Cassola"'
Autor:
V.S.M. Barros, R Kramer, Viviane K. Asfora, V F Cassola, João Victor Costa, Helen J. Khoury, Marcos Ely Almeida Andrade, Matheus Fernando Santos
Publikováno v:
Biomedical physicsengineering express. 6(1)
Recent epidemiological studies suggested to lower the threshold dose for radiation induced cataract in the eye lens. Therefore, eye lens radiation protection became to play a more important role in personal dosimetry. The main objective of this work
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33260f3ce73e2afd3bcc689249055d07
https://pubmed.ncbi.nlm.nih.gov/33438597
https://pubmed.ncbi.nlm.nih.gov/33438597
Publikováno v:
Radiation protection dosimetry. 191(1)
The aim of this work was to estimate patient’s organ absorbed doses from pediatric helical head computed tomography (CT) examinations using the Size-Specific Dose Estimate (SSDE) methodology and to determine organ dose to SSDE conversion coefficien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6faa79995d7d8a06ddecfa31eef97ca9
https://pubmed.ncbi.nlm.nih.gov/32984906
https://pubmed.ncbi.nlm.nih.gov/32984906
Autor:
V F Cassola, Marcos Ely Almeida Andrade, M W C de Araújo, Helen J. Khoury, David J. Brenner, R Kramer
Publikováno v:
Physics in medicine and biology. 62(3)
The purpose of bowtie filters in CT scanners is to homogenize the x-ray intensity measured by the detectors in order to improve the image quality and at the same time to reduce the dose to the patient because of the preferential filtering near the pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1686564aa973365c5985dd3ea90796c8
https://pubmed.ncbi.nlm.nih.gov/28072578
https://pubmed.ncbi.nlm.nih.gov/28072578
Autor:
C. A. B. de Oliveira Lira, K Robson Brown, Helen J. Khoury, V F Cassola, J W Vieira, R Kramer, V J de Melo Lima
Publikováno v:
Journal of Radiological Protection. 33:669-691
The purpose of this study is the development of paediatric reference phantoms for newborn and 1-year-old infants to be used for the calculation of organ and tissue equivalent doses in radiation protection. The study proposes a method for developing a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58ebf9333f2b697a583f25f0df8999f7
https://doi.org/10.1088/0952-4746/33/3/669
https://doi.org/10.1088/0952-4746/33/3/669
Autor:
Helen J. Khoury, K Robson Brown, J W Vieira, R Kramer, C. A. B. de Oliveira Lira, V F Cassola
Publikováno v:
Physics in Medicine and Biology. 57:3995-4021
Two skeletal dosimetry methods using µCT images of human bone have recently been developed: the paired-image radiation transport (PIRT) model introduced by researchers at the University of Florida (UF) in the US and the systematic–periodic cluster
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75a0b413833ac6045d9d381e9879a1df
https://doi.org/10.1088/0031-9155/57/12/3995
https://doi.org/10.1088/0031-9155/57/12/3995
Autor:
V J de Melo Lima, C. A. B. de Oliveira Lira, Helen J. Khoury, R Kramer, J. W. Vieira, V F Cassola
Publikováno v:
Medical Physics. 38:4723-4736
Purpose: The purpose of this study is the development of reference pediatric phantoms for 5- and 10-year-old children to be used for the calculation of organ and tissue equivalent doses in radiation protection. Methods: The study proposes a method fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ebaebdd64970e4398667c8316212375
https://doi.org/10.1118/1.3615623
https://doi.org/10.1118/1.3615623
Autor:
Richard B. Richardson, C. A. B. de Oliveira Lira, R Kramer, J W Vieira, V F Cassola, K Robson Brown, Helen J. Khoury
Publikováno v:
Physics in Medicine and Biology. 56:1803-1836
When the human body is exposed to ionizing radiation, among the soft tissues at risk are the active marrow (AM) and the bone endosteum (BE) located in tiny, irregular cavities of trabecular bone. Determination of absorbed fractions (AFs) of energy or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8828affeb6483ae302f02fd1da80ede7
https://doi.org/10.1088/0031-9155/56/6/018
https://doi.org/10.1088/0031-9155/56/6/018
Autor:
Ana P. Perini, Lucio P. Neves, R Kramer, V F Cassola, Linda V.E. Caldas, José M. Fernández-Varea, Helen J. Khoury
Publikováno v:
Radiation Physics and Chemistry. 95:106-108
The calibration procedure in radiotherapy treatments is very important and a sensitive task due to the high doses delivered to the patients. Generally, the air-kerma cavity standards for 60Co gamma rays are graphite cavity ionization chambers. In thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::229d25bcc336b0bf6a081b45b73b11dc
https://doi.org/10.1016/j.radphyschem.2013.01.005
https://doi.org/10.1016/j.radphyschem.2013.01.005
Autor:
V F Cassola, Ana P. Perini, Lucio P. Neves, R Kramer, José M. Fernández-Varea, Helen J. Khoury, Linda V.E. Caldas
Publikováno v:
Radiation Physics and Chemistry. 95:98-100
The aim of this work was to study the performance of a pencil ionization chamber with a sensitive volume of only 1.06 cm3 and a length of 3.0 cm, developed at the Calibration Laboratory of the IPEN, in very low-energy radiotherapy X-ray beams. These
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d17b7e3275690f2c37a08a43369dce33
https://doi.org/10.1016/j.radphyschem.2012.12.042
https://doi.org/10.1016/j.radphyschem.2012.12.042
Publikováno v:
Physics in Medicine and Biology. 55:133-162
Among computational models, voxel phantoms based on computer tomographic (CT), nuclear magnetic resonance (NMR) or colour photographic images of patients, volunteers or cadavers have become popular in recent years. Although being true to nature repre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60d35c664f359bc20a103419cf77d7f0
https://doi.org/10.1088/0031-9155/55/1/009
https://doi.org/10.1088/0031-9155/55/1/009