Image Quality Evaluation of Medical Displays and Development of Super High-resolution Display

概要

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Medical displays are indispensable for picture archives and communication system in medical settings, and the performance of the displays have been improved day by day. Therefore, image quality evaluations of displays are still important, and continued effective improvements of display's performance are demanded by users. Author has been developed image quality evaluation methods for medical displays. For resolution measurement, a simple and accurate method using high-contrast bar-pattern images was developed. For noise property evaluation, a method which can elude problems caused by pixel structures and accurately measure random noise level was developed. Both methods can be performed by using a commercially available digital camera, and do not need complicated procedures for measurement, which were indispensable in previously reported methods. Author also developed super high-resolution medical liquid crystal displays (LCDs) using independent sub-pixel drive technology. The developed LCDs provide three times resolution enhancement, and have performances that can display high signal-to-noise ratio images of digital mammography and general radiography images.