{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T10:02:36Z","timestamp":1789552956946,"version":"build-2803163510"},"reference-count":39,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"5","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circ: Cardiovascular Imaging"],"published-print":{"date-parts":[[2018,5]]},"abstract":"<jats:sec>\n            <jats:title>Background:<\/jats:title>\n            <jats:p>Single photon emission computed tomography (SPECT)\/computed tomography (CT) imaging allows for assessment of skeletal muscle microvascular perfusion but has not been quantitatively assessed in angiosomes, or 3-dimensional vascular territories, of the foot. This study assessed and compared resting angiosome foot perfusion between healthy subjects and diabetic patients with critical limb ischemia (CLI). Additionally, the relationship between SPECT\/CT imaging and the ankle\u2013brachial index\u2014a standard tool for evaluating peripheral artery disease\u2014was assessed.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods and Results:<\/jats:title>\n            <jats:p>\n              Healthy subjects (n=9) and diabetic patients with CLI and nonhealing ulcers (n=42) underwent SPECT\/CT perfusion imaging of the feet. CT images were segmented into angiosomes for quantification of relative radiotracer uptake, expressed as standardized uptake values. Standardized uptake values were assessed in ulcerated angiosomes of patients with CLI and compared with whole-foot standardized uptake values in healthy subjects. Serial SPECT\/CT imaging was performed to assess uptake kinetics of technetium-99m-tetrofosmin. The relationship between angiosome perfusion and ankle\u2013brachial index was assessed via correlational analysis. Resting perfusion was significantly lower in CLI versus healthy subjects (\n              <jats:italic>P<\/jats:italic>\n              =0.0007). Intraclass correlation coefficients of 0.95 (healthy) and 0.93 (CLI) demonstrated excellent agreement between serial perfusion measurements. Correlational analysis, including healthy and CLI subjects, demonstrated a significant relationship between ankle\u2013brachial index and SPECT\/CT (\n              <jats:italic>P<\/jats:italic>\n              =0.01); however, this relationship was not significant for diabetic CLI patients only (\n              <jats:italic>P<\/jats:italic>\n              =0.2).\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions:<\/jats:title>\n            <jats:p>SPECT\/CT imaging assesses regional foot perfusion and detects abnormalities in microvascular perfusion that may be undetectable by conventional ankle\u2013brachial index in patients with diabetes mellitus. SPECT\/CT may provide a novel approach for evaluating responses to targeted therapies.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1161\/circimaging.117.006932","type":"journal-article","created":{"date-parts":[[2018,5,10]],"date-time":"2018-05-10T09:20:17Z","timestamp":1525944017000},"update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":46,"title":["Radiotracer Imaging Allows for Noninvasive Detection and Quantification of Abnormalities in Angiosome Foot Perfusion in Diabetic Patients With Critical Limb Ischemia and Nonhealing Wounds"],"prefix":"10.1161","volume":"11","author":[{"given":"Jessica L.","family":"Alvelo","sequence":"first","affiliation":[{"name":"Department of Internal Medicine (J.L.A., C.M.-H., B.E.S., A.J.S., M.R.S.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xenophon","family":"Papademetris","sequence":"additional","affiliation":[{"name":"Department of Radiology and Biomedical Imaging (X.P., B.E.S., A.J.S.)"},{"name":"Department of Biomedical Engineering (X.P.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"Mena-Hurtado","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine (J.L.A., C.M.-H., B.E.S., A.J.S., M.R.S.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sangchoon","family":"Jeon","sequence":"additional","affiliation":[{"name":"Yale School of Nursing (S.J.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bauer E.","family":"Sumpio","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine (J.L.A., C.M.-H., B.E.S., A.J.S., M.R.S.)"},{"name":"Department of Radiology and Biomedical Imaging (X.P., B.E.S., A.J.S.)"},{"name":"and Department of Surgery (B.E.S.) 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