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Fast cross‐projection algorithm for reconstruction of seeds in prostate brachytherapy
Author(s) -
Narayanan Sreeram,
Cho Paul S.,
Marks Robert J.
Publication year - 2002
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1489044
Subject(s) - brachytherapy , projection (relational algebra) , prostate brachytherapy , matching (statistics) , dosimetry , algorithm , overhead (engineering) , computer science , reduction (mathematics) , computer vision , mathematics , artificial intelligence , nuclear medicine , medicine , radiation therapy , statistics , geometry , radiology , operating system
A fast method of seed matching and reconstruction in prostrate brachytherapy is proposed. Previous approaches have required all seeds to be matched with all other seeds in other projections. The fast cross‐projection algorithm for the reconstruction of seeds (Fast‐CARS) allows for matching of a given seed with a subset of seeds in other projections. This subset lies in a proximal region centered about the projection of a line, connecting the seed to its source, onto other projection planes. The proposed technique permits a significant reduction in computational overhead, as measured by the required number of matching tests. The number of multiplications and additions is also vastly reduced at no trade‐off in accuracy. Because of its speed, Fast‐CARS can be used in applications requiring real‐time performance such as intraoperative dosimetry of prostate brachytherapy. Furthermore, the proposed method makes practical the use of a larger number of views as opposed to previous techniques limited to a maximum use of three views.