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Magnetic resonance imaging (MRI) utilizes radiofrequency (r.f.) EM fields to produce images. Here we present the first visualization of an EM vacuum inside a bulk metal strip by MRI, amongst several novel findings.\n  We uncover unexpected MRI intensity patterns arising from two orthogonal pairs of faces of a metal strip, and derive formulae for their intensity ratios"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1610.03710","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-10-10T14:00:53Z","cross_cats_sorted":["physics.med-ph"],"title_canon_sha256":"74a67072fa0de317bf4437346097d0c8896ac310e07623d819ef46bef97097d0","abstract_canon_sha256":"db40d32255ec2478e7afa283a2b6adeee4ffcb7000df96ab29c2189ee2d795c1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:20.504406Z","signature_b64":"hr42ynxxKDcjXdV74qTi+LFQadDvdMCeCVi5ssypPAL1yeaLkLAlXSGULPnHuuEYWog+nN5UC3I+hw8H7kb6BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"34b03d28ec096e813c813b1952b8e928549e7c7cdc51e86b3b9ca7074601afa7","last_reissued_at":"2026-05-18T00:55:20.503669Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:20.503669Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Visualizing electromagnetic vacuum by MRI","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.med-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Annadanesh Shellikeri, Chandrika S. 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