{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T19:06:23Z","timestamp":1789153583615,"version":"build-2803163510"},"reference-count":16,"publisher":"Oxford University Press (OUP)","issue":"1178","license":[{"start":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T00:00:00Z","timestamp":1761091200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,2,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>Fistula T2 signal intensity and volume are predictive of treatment response in IBD. We aimed to evaluate pTRACK-generated MRI metrics against MAGNIFI-CD, assessing predictive value for clinical outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>MRI and clinical assessment cases of 46 patients with pCD were included. T2 signal intensity was normalized using ROI in adjacent pelvic muscles. Clinical outcomes were scored using physician global assessment. Correlations, unpaired 2-tailed t-tests, and receiver operating characteristics curve analyses performance metrics were used to compare MRI metrics and predict PGA categories.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Normalized average T2 signal intensity demonstrated AUC 0.784 (95% CI: 0.648-0.893). Optimal threshold for classification was 1.527, with accuracy of 80.0%, with high sensitivity (0.857) and moderate specificity (0.632). MAGNIFI-CD scores (ICC\u2009=\u20090.87, 95% CI: 0.45-0.98, P\u2009=\u2009.0014), fistula volume (ICC\u2009=\u20090.81, 95% CI: 0.21-0.97, P\u2009=\u2009.0103) showed good-excellent reliability. Significant differences were observed when dichotomized into remission and active groups: T2 signal intensity (1.55\u2009ms \u00b1 0.88 vs. 2.87\u2009ms \u00b1 1.42, P\u2009&amp;lt;\u2009.001), fistula volume (2.0\u2009\u00b1\u20093.3\u2009mL vs. 4.3\u2009\u00b1\u20098.7\u2009mL, P\u2009=\u2009.04) and MAGNIFI-CD (5.86\u2009\u00b1\u20094.70 vs. 12.41\u2009\u00b1\u20095.80, P\u2009&amp;lt;\u2009.001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>pTRACK\u2019s normalized T2 signal demonstrated comparable accuracy to MAGNIFI-CD, with higher sensitivity for predicting pCD activity. These findings underscore pTRACK's potential utility, warranting prospective validation in cohorts with more severe disease.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Advances in Knowledge<\/jats:title>\n                    <jats:p>pTRACK enables radiologists to measure fistula volume, normalized average T2 signal intensity, and generate 3D digital models, and has shown comparable accuracy to MAGNIFI-CD.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/bjr\/tqaf263","type":"journal-article","created":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T19:37:09Z","timestamp":1761161829000},"page":"299-304","source":"Crossref","is-referenced-by-count":2,"title":["pTRACK-generated normalized average T2 signal intensity and fistula volume are accurate and sensitive measures of perianal Crohn\u2019s disease activity"],"prefix":"10.1093","volume":"99","author":[{"given":"Iyad","family":"Naim","sequence":"first","affiliation":[{"name":"Motilent Ltd , London, E1 8FA,","place":["United Kingdom"]},{"name":"School of Physics, The University of Nottingham, Sir Peter Mansfield Centre , Nottingham, NG7 2QX,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Greer","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology, London North West University Healthcare NHS Trust, London, HA1 3UJ,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gauraang","family":"Bhatnagar","sequence":"additional","affiliation":[{"name":"Motilent Ltd , London, E1 8FA,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5483-1027","authenticated-orcid":false,"given":"Caroline","family":"Hoad","sequence":"additional","affiliation":[{"name":"School of Physics, The University of Nottingham, Sir Peter Mansfield Centre , Nottingham, NG7 2QX,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jon","family":"Evans","sequence":"additional","affiliation":[{"name":"Nottingham University Hospitals NHS trust , Nottingham, NG7 2UH,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dennis","family":"Poon","sequence":"additional","affiliation":[{"name":"Nottingham University Hospitals NHS trust , Nottingham, NG7 2UH,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2226-0810","authenticated-orcid":false,"given":"Shellie","family":"Radford","sequence":"additional","affiliation":[{"name":"School of Medicine, The University of Nottingham, NIHR Nottingham Biomedical Research Centre , Nottingham, NG7 2UH,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seb","family":"Tucknott","sequence":"additional","affiliation":[{"name":"Motilent Ltd , London, E1 8FA,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Menys","sequence":"additional","affiliation":[{"name":"Motilent Ltd , London, E1 8FA,","place":["United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gordon William","family":"Moran","sequence":"additional","affiliation":[{"name":"School of Medicine, The University of Nottingham, NIHR Nottingham Biomedical Research Centre 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