Streak artefact quantification for abdominal CT

Michael Figl; Romana Fragner; Patrick Heimel; Christian Loewe; Wolfgang Birkfellner

doi:10.1117/12.878577

3 March 2011 Streak artefact quantification for abdominal CT

Michael Figl, Romana Fragner, Patrick Heimel, Christian Loewe, Wolfgang Birkfellner

Proceedings Volume 7966, Medical Imaging 2011: Image Perception, Observer Performance, and Technology Assessment; 79661Q (2011) https://doi.org/10.1117/12.878577
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States

Abstract

Streaking artefacts in computed tomography (CT) can be caused by photon starvation caused by highly attenuating regions. Patient positioning can influence the attenuation e.g. by arms raised or down in an abdominal CT scan. Positioning the arms alongside the body increases attenuation, therefore higher dose can be expected. Additionally the artefacts can cause a decrease in image quality. Measuring this quality decrease is the purpose of this article. We implemented different methods to quantise streaking artefacts and correlated them to the judgement of two radiologists in a study of 80 patients. High significance was found for a correlation coefficient of 0.57. This correlation from measurements and clinical usability (represented by the radiologists' ratings) enables to predict the usability by means of image processing alone. This can be included in the patient image as a correlate to the diagnostic usability, resp. a new volume can be made depending on the number.

Citation Download Citation

Michael Figl, Romana Fragner, Patrick Heimel, Christian Loewe, and Wolfgang Birkfellner "Streak artefact quantification for abdominal CT", Proc. SPIE 7966, Medical Imaging 2011: Image Perception, Observer Performance, and Technology Assessment, 79661Q (3 March 2011); https://doi.org/10.1117/12.878577

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