Comparison of imaging characteristics of multiple-beam equalization and storage phosphor direct digitizer radiographic systems

A. Sankaran; Keh-Shih Chuang; Hisashi Yonekawa; H. K. Huang

doi:10.1117/12.59392

1 June 1992 Comparison of imaging characteristics of multiple-beam equalization and storage phosphor direct digitizer radiographic systems

A. Sankaran, Keh-Shih Chuang, Hisashi Yonekawa, H. K. Huang

Author Affiliations +

Proceedings Volume 1651, Medical Imaging VI: Instrumentation; (1992) https://doi.org/10.1117/12.59392
Event: Medical Imaging VI, 1992, Newport Beach, CA, United States

Abstract

The imaging characteristics of two chest radiographic equipment, Advanced Multiple Beam Equalization Radiography (AMBER) and Konica Direct Digitizer [using a storage phosphor (SP) plate] systems have been compared. The variables affecting image quality and the computer display/reading systems used are detailed. Utilizing specially designed wedge, geometric, and anthropomorphic phantoms, studies were conducted on: exposure and energy response of detectors; nodule detectability; different exposure techniques; various look- up tables (LUTs), gray scale displays and laser printers. Methods for scatter estimation and reduction were investigated. It is concluded that AMBER with screen-film and equalization techniques provides better nodule detectability than SP plates. However, SP plates have other advantages such as flexibility in the selection of exposure techniques, image processing features, and excellent sensitivity when combined with optimum reader operating modes. The equalization feature of AMBER provides better nodule detectability under the denser regions of the chest. Results of diagnostic accuracy are demonstrated with nodule detectability plots and analysis of images obtained with phantoms.

Citation Download Citation

A. Sankaran, Keh-Shih Chuang, Hisashi Yonekawa, and H. K. Huang "Comparison of imaging characteristics of multiple-beam equalization and storage phosphor direct digitizer radiographic systems", Proc. SPIE 1651, Medical Imaging VI: Instrumentation, (1 June 1992); https://doi.org/10.1117/12.59392

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