A Comparison Of Conventional And Equalized (AMBER) Radiographs Before And After Digitization Using A 3M Chest Phantom

Abstract

To evaluate the loss of information in the process of digitizing radiographs, followed by reprinting these on film, a study was performed. Radiographs were taken of a 3M chest phantom with a random distribution of lucite cylinders, simulating pulmonary nodules, using two different dose techniques: a conventional technique, and an equalization technique (AMBER). All radiographs were digitized to a 2048 *2048 *8 matrix by means of a Konica KFDR -S laser scanner, and reprinted on film by means of a 3M laser printer. A traditional ROC study was performed, presenting the films to four radiologists. Results indicate no information loss for the conventional chest radiographs, but slight loss of nodule detectability in the equalized radiographs. 1. INTRODt ICTION SPIE Vol. 1090 Medical Imaging III: Image Formation (1989) / 393 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/24/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx SPIE Vol. 1090 Medical Imaging III: Image Formation (1989) / 395 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/24/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx