Evaluation of image quality of a new CCD-based system for chest imaging

Patrik Sund, Magnus Bath, Susanne Kheddache, Ulf Tylen, Lars Gunnar Mansson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

24 Scopus citations


The Imix radiography system (Oy Imix Ab, Finland) consists of an intensifying screen, optics, and a CCD camera. An upgrade of this system (Imix 2000) with a red-emitting screen and new optics has recently been released. The image quality of Imix (original version), Imix 2000, and two storage-phosphor systems, Fuji FCR 9501 and Agfa ADC70 was evaluated in physical terms (DQE) and with visual grading of the visibility of anatomical structures in clinical images (141 kV). PA chest images of 50 healthy volunteers were evaluated by experienced radiologists. All images were evaluated on Siemens Simomed monitors, using the European Quality Criteria. The maximum DQE values for Imix, Imix 2000, Agfa and Fuji were 11%, 14%, 17% and 19%, respectively (141 kV, 5 μGy). Using the visual grading, the observers rated the systems in the following descending order: Fuji, Imix 2000, Agfa, and Imix. Thus, the upgrade to Imix 2000 resulted in higher DQE values and a significant improvement in clinical image quality. The visual grading agrees reasonably well with the DQE results; however, Imix 2000, received a better score than what could be expected from the DQE measurements.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Number of pages8
StatePublished - 2000
Externally publishedYes
EventMedical Imaging 2000: Image Perception and Performance - San Diego, CA, USA
Duration: Feb 16 2000Feb 17 2000


OtherMedical Imaging 2000: Image Perception and Performance
CitySan Diego, CA, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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