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^{Disclaimer: This search engine is based on the 2017 ACR Appropriateness Criteria®. The newly updated criteria can be found at ACR website.}

^{ACR Appropriateness Criteria® are evidence-based guidelines to assist physicians to choose the most appropriate imaging modalities for common clinical conditions. Each imaging modality is rated on a scale of 1-9; only modalities with ratings 7, 8, 9 are considered “usually appropriate” and are included in the query below.}

^{Last updated 6/20/2017.}