Numerical Stability issues on Channelized Hotelling Observer under different background assumptions

International audienceThis paper addresses the numerical stability issue on the channelized Hotelling observer (CHO). The CHO is a well-known approach in the medical image quality assessment domain. Many researchers have found that the detection performance of the CHO does not increase with the number of channels, contrary to expectation. And to our knowledge, nobody in this domain has found the reason. We illustrated that this is due to the ill-posed problem of the scatter matrix and proposed a solution based on Tikhonov regularization. Although Tikhonov regularization has been used in many other domains, we show in this paper another important application of Tikhonov regularization. This is very important for researchers to continue the CHO (and other channelized model observer) investigation with a reliable detection performance calculation

A MULTI-SLICE MODEL OBSERVER FOR MEDICAL IMAGE QUALITY ASSESSMENT

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KEY ISSUES AND SPECIFICITIES FOR THE OBJECTIVE MEDICAL IMAGE QUALITY ASSESSMENT

Though several objective image quality assessment methods originally proposed for natural images and videos have been used in the context of medical images, some important specificities usually ignored have to be considered. This paper presents a review on some key issues (diagnostic task, pathology, figure of merit, expertise, validation subjective experimental protocol, etc.) that must be considered for the objective quality assessment of still radiographic images acquired from the acquisition systems of varied imaging modalities. 1

An overview of model observers

International audienceNowadays, model observers have been used more and more for the objective quality assessment of medical images. Model observers have been developed from signal known exactly (SKE) task to signal known statistically (SKS) task, from single-slice (2D) to multi-slice (3D), in order to be more clinical relevant. In this paper, we give an overview of existing model observers up to date

A perceptually relevant channelized joint observer (pcjo) for the detection-localization of parametric signals

(PCJO) for the detection-localization of parametric signal

Test diagnostique non invasif de morphométrie automatisée de l'histologie des polypes coliques

Test diagnostique non invasif de morphométrie automatisée de l’histologie des polypes coliques</p

Video quality perception in telesurgery

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A study on the usability of opinion-unaware no-reference natural image quality metrics in the context of medical images

International audienc