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Computational adjustment technique for digital mammographic images based on the digitizer characteristic curve

[+] Author Affiliations
Renata de Freitas Góes

Universidade de São Paulo, Departamento de Engenharia Elétrica, São Carlos, São Paulo, Brazil

Homero Schiabel

Universidade de São Paulo, Departamento de Engenharia Elétrica, São Carlos, São Paulo, Brazil

J. Electron. Imaging. 17(4), 043012 (November 12, 2008). doi:10.1117/1.3013544
History: Received November 20, 2007; Revised August 07, 2008; Accepted September 08, 2008; Published November 12, 2008
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We evaluated the performance of a novel procedure for segmenting mammograms and detecting clustered microcalcifications in two types of image sets obtained from digitization of mammograms using either a laser scanner, or a conventional “optical” scanner. Specific regions forming the digital mammograms were identified and selected, in which clustered microcalcifications appeared or not. A remarkable increase in image intensity was noticed in the images from the optical scanner compared with the original mammograms. A procedure based on a polynomial correction was developed to compensate the changes in the characteristic curves from the scanners, relative to the curves from the films. The processing scheme was applied to both sets, before and after the polynomial correction. The results indicated clearly the influence of the mammogram digitization on the performance of processing schemes intended to detect microcalcifications. The image processing techniques applied to mammograms digitized by both scanners, without the polynomial intensity correction, resulted in a better sensibility in detecting microcalcifications in the images from the laser scanner. However, when the polynomial correction was applied to the images from the optical scanner, no differences in performance were observed for both types of images.

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© 2008 SPIE and IS&T

Citation

Renata de Freitas Góes and Homero Schiabel
"Computational adjustment technique for digital mammographic images based on the digitizer characteristic curve", J. Electron. Imaging. 17(4), 043012 (November 12, 2008). ; http://dx.doi.org/10.1117/1.3013544


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