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Development of a Voxel Model of the Heart for Dosimetry
Author(s) -
Fonseca Keila R.,
Trindade Bruno M.,
Campos Tarcísio P.R.
Publication year - 2011
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.2011.01258.x
Subject(s) - voxel , restenosis , dosimetry , computed tomographic , nuclear medicine , balloon , biomedical engineering , medicine , computer science , radiology , stent , cardiology , computed tomography
This article investigates the dosimetry of a radioactive stent and radioactive liquid balloon placed into the heart vasculature to prevent restenosis after atherosclerosis treatment. The research aims to know the dosages to establish a suitable activity which achieves restenosis control and thereafter minimize radiation effects in the cardiac muscle. In order to accomplish the dosimetric analysis, a heart voxel model was assembled based on tomographic images. The computational model consists of a three‐dimensional matrix taken from 60 tomographic images representing the major heart tissues. A radioactive 153 Sm liquid balloon is simulated as well as a 32 P radioactive stent, inserted in an arbitrary heart artery. After simulation processing, the absorbed dose rate was evaluated in the heart musculature. The models are presented in two‐ and three‐dimensional previews and the dosage profiles are shown by isodose curves superimposed onto the heart model.