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Neither renal ultrasound nor computerized tomography (CT) and magnetic resonance (MR) angiography revealed any anomaly. An MR protocol was then performed including arterial spin labeling and intravoxel incoherent motion diffusion weighted imaging. Both arterial spin labeling and the perfusion fraction in the diffusion weighted imaging showed decreased perfusion compared to reference values. The patient subsequently underwent angiography, where an arteriovenous fistula in the upper calix of the transplant kidney was detected and immediate embolization was performed. A second functional MR, performed one\u00a0week later, demonstrated a 40% increase in organ perfusion. We conclude that functional MR with arterial spin labeling and intravoxel incoherent motion have the potential to provide complementary information of clinical value to conventional imaging for monitoring renal allografts.<\/jats:p>","DOI":"10.1007\/s40620-022-01539-y","type":"journal-article","created":{"date-parts":[[2023,1,25]],"date-time":"2023-01-25T05:02:31Z","timestamp":1674622951000},"page":"1175-1180","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Functional MRI  to quantify perfusion changes of a renal allograft after embolization of an arteriovenous fistula"],"prefix":"10.1093","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6937-1681","authenticated-orcid":false,"given":"Cecilia","family":"Liang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David J.","family":"Heister","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martina","family":"Guthoff","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gerd","family":"Gr\u00f6zinger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Petros","family":"Martirosian","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ferdinand","family":"Seith","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2023,1,25]]},"reference":[{"key":"1539_CR1","doi-asserted-by":"publisher","first-page":"94","DOI":"10.1159\/000491558","volume":"140","author":"RB Mannon","year":"2018","unstructured":"Mannon RB (2018) Delayed graft function: the AKI of kidney transplantation. 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