{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T23:23:53Z","timestamp":1790378633762,"version":"4.1.0"},"reference-count":26,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2010,10,1]],"date-time":"2010-10-01T00:00:00Z","timestamp":1285891200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Ultrason Imaging"],"published-print":{"date-parts":[[2010,10]]},"abstract":"<jats:p>We have characterized the viscoelastic properties of human cervical tissue through a range of pre-compressional loads and testing frequencies. Mechanical testing is necessary to develop robust elasticity-based techniques for the diagnosis of cervical abnormalities. The storage modulus ( E\u2032) and material damping (tan \u03b4) were measured in 13 patients, 40 to 76 years old. Our results showed that E\u2032 increased monotonically from approximately 4.7 to 6.3 kPa over the precompression range (1\u20136%) for a testing frequency of 1 Hz. Increases in precompressions of 4% or greater significantly increased E\u2032 obtained after dynamic compression testing when data were normalized to 1% precompression. Tan \u03b4 remained fairly constant (\u223c0.35) and was not significantly affected by changes in precompression. E\u2032 and tan \u03b4 increased significantly with frequency. E\u2032 monotonically increased from 4.7 to 7.9 kPa for the 1\u20133% compression range (lowest precompression for 2% amplitude) and from 6.3 to 10.3 kPa for the 6\u20138% range (highest precompression for 2% amplitude) when increasing frequency from 1 to 30 Hz. Tan \u03b4 increased montonically from 0.35 to 0.45 for 2% amplitude compressions from 1 to 30 Hz regardless of initial precompression. Our results show that precompression and testing frequency must be taken into account in orderto obtain consistent measurements in mechanical diagnostic tests developed for cervical abnormalities.<\/jats:p>","DOI":"10.1177\/016173461003200402","type":"journal-article","created":{"date-parts":[[2013,3,2]],"date-time":"2013-03-02T02:14:01Z","timestamp":1362190441000},"page":"214-228","source":"Crossref","is-referenced-by-count":19,"title":["Compression-Dependent Viscoelastic Behavior of Human Cervix Tissue"],"prefix":"10.1177","volume":"32","author":[{"given":"Ryan J.","family":"DeWall","sequence":"first","affiliation":[{"name":"Department of Medical Physics University of Wisconsin \u2014 Madison Madison, WI 53705"},{"name":"Department of Biomedical Engineering University of Wisconsin \u2014 Madison Madison, WI 53705"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomy","family":"Varghese","sequence":"additional","affiliation":[{"name":"Department of Medical Physics 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