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. 2020 Aug 6;9(8):2548. doi: 10.3390/jcm9082548

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Periprosthetic infection left knee arthroplasty. Scout radiograph (A) demonstrates bilateral knee arthroplasties. The right is a revision arthroplasty and the left is a primary implant. On the ¹¹¹In-WBC single photon emission computed tomography/computed tomography (SPECT)/CT) (B) there is abnormal labeled leukocyte activity along the anterior aspect of the left knee arthroplasty (white arrows). On the ^99mTc-sulfur colloid SPECT/CT (C), there is no corresponding activity in this region (yellow arrows) and therefore the study is positive for infection.