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Automated detection of BB pixel clusters in digital fluoroscopic images. Phys Med Biol 1998 Sep;43(9):2677-83

Date

10/02/1998

Pubmed ID

9755954

DOI

10.1088/0031-9155/43/9/018

Scopus ID

2-s2.0-0031663998   14 Citations

Abstract

Small ball bearings (BBs) are often used to characterize and correct for geometric distortion of x-ray image intensifiers. For quantitative applications the number of BBs required for accurate distortion correction is prohibitively large for manual detection. A method to automatically determine the BB coordinates is described. The technique consists of image segmentation, pixel coalescing and centroid calculation. The dependence of calculated BB coordinates on segmentation threshold was also evaluated and found to be within the uncertainty of measurement.

Author List

Cho PS, Johnson RH

Author

Roger H. Johnson PhD Associate Professor in the Biophysics department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Algorithms
Biophysical Phenomena
Biophysics
Fluoroscopy
Humans
Models, Theoretical
Phantoms, Imaging
Radiographic Image Enhancement
Technology, Radiologic
X-Ray Intensifying Screens