Premium
C‐Arm imaging for brachytherapy source reconstruction: Geometrical accuracy
Author(s) -
Fung Albert Y. C.
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 - 10.1118/1.1473136
Subject(s) - image intensifier , imaging phantom , brachytherapy , iterative reconstruction , rotation (mathematics) , radiography , computed radiography , computer science , nuclear medicine , computer vision , optics , artificial intelligence , physics , image quality , image (mathematics) , medicine , radiology , radiation therapy , nuclear physics
We study the accuracy of brachytherapy source reconstruction using C‐Arm images. We use a phantom embedded with dummy ribbons in a regular pattern, placed at the rotation center of the C‐Arm. With a commercial reconstruction jig, radiographic films are taken without the image intensifier. The average error in reconstructed seed coordinates is 0.1 cm. However, the jig is inconvenient for patient procedures. For C‐Arm reconstruction without the jig, the magnifications of the image intensifier along orthogonal directions are different. We “stretch” the image to equalize the magnifications. Afterward, seed reconstruction has an average error of 0.1 cm in all directions.