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They are audible intermittent high-frequency (above 200\u2009Hz) sounds mixed with background noise and transmitted low-frequency (below 100\u2009Hz) heart sounds that wax and wane periodically. It is a nontrivial task to extract both bruits and heart sounds with high fidelity for further computer-aided auscultation and diagnosis. In this paper we propose a rolling ball sifting algorithm that is capable to filter signals with a sharper frequency selectivity mechanism in the time domain. By rolling two balls (one above and one below the signal) of a suitable radius, the balls are large enough to roll over bruits and yet small enough to ride on heart sound waveforms. The high-frequency bruits can then be extracted according to a tangibility criterion by using the local extrema touched by the balls. Similarly, the low-frequency heart sounds can be acquired by a larger radius. By visualizing the periodicity information of both the extracted heart sounds and bruits, the proposed visual inspection method can potentially improve carotid bruit diagnosis accuracy.<\/jats:p>","DOI":"10.1038\/srep30179","type":"journal-article","created":{"date-parts":[[2016,7,25]],"date-time":"2016-07-25T09:17:31Z","timestamp":1469438251000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Rolling ball sifting algorithm for the augmented visual inspection of carotid bruit auscultation"],"prefix":"10.1038","volume":"6","author":[{"given":"Adam","family":"Huang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chung-Wei","family":"Lee","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hon-Man","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2016,7,25]]},"reference":[{"key":"BFsrep30179_CR1","unstructured":"Kurtz, K. 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