Retraction notice to "Research on individualized distribution approach of coronary resting blood flow for noninvasive calculation of fractional flow reserve" [Computer Methods and Programs in Biomedicine 240 (2023) 107704].

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the authors, after they reported methodological errors that compromise the accuracy of the results and the conclusion drawn from their findings. Specifically, the authors have reported an improvement in the accuracy of fractional flow reserve (FFR) estimation by improving the accuracy of coronary blood flow calculation in the resting state. This was later identified by the authors to be due to an error in their methodology when setting the CTA image grayscale threshold to 100 in the software MIMICS, which was reported to the journal. This value is too large, resulting in the coronary branches model with sizes between 1 and 1.7 mm not being displayed, and thus, overestimating the accuracy of the FFR estimation. Further evaluation of the method with a more appropriate parameter value led to a decrease in the accuracy of their FFR predictions from 91.74 % to 77.69 %, which is lower than Taylor's method (82.64 %). This contradicted the conclusion drawn from the paper. The Editors understand the significance of retracting a published paper and its potential impact on the authors, the readership, and the scientific community. However, the Editors firmly believe in upholding the highest standards of scientific rigor and accuracy, and therefore, a retraction of this paper is necessary to overcome the inaccurate information that has been disseminated and maintain the trust and credibility of the journal.