{"doi":"10.1002/mrm.30066","title":"Hand‐held electron spin resonance scanner for subcutaneous oximetry using <scp>OxyChip</scp>","abstract":"Abstract Purpose Electron spin resonance (ESR) is used to measure oxygen partial pressure (pO 2 ) in biological media with many clinical applications. Traditional clinical ESR involves large magnets that encompass the subject of measurement. However, certain applications might benefit from a scanner operating within local static magnetic fields. Our group recently developed such a compact scanner for transcutaneous (surface) pO 2 measurements of skin tissue. Here we extend this capability to subsurface (subcutaneous) pO 2 measurements and verify it using an artificial tissue emulating (ATE) phantom. Methods We introduce a new scanner, tailored for subcutaneous measurements up to 2 mm beneath the skin's surface. This scanner captures pulsed ESR signals from embedded approximate 1‐mm oxygen‐sensing solid paramagnetic implant, OxyChip. The scanner features a static magnetic field source, producing a uniform region outside its surface, and a compact microwave resonator, for exciting and receiving ESR signals. Results ESR readings derived from an OxyChip, positioned approximately 1.5 mm from the scanner's surface, embedded in ATE phantom, exhibited a linear relation of 1/T 2 versus pO 2 for pO 2 levels at 0, 7.6, 30, and 160 mmHg, with relative reading accuracy of about 10%. Conclusion The compact ESR scanner can report pO 2 data in ATE phantom from an external position relative to the scanner. Implementing this scanner in preclinical and clinical applications for subcutaneous pO 2 measurements is a feasible next phase for this development. This innovative design also has the potential to operate in conjunction with artificial skin graft for wound healing, combining therapeutic and pO 2 diagnostic features.","journal":"Magnetic Resonance in Medicine","year":2024,"id":470573,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":2,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9506,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2024-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1304998,"name":"Oleg Zgadzai","orcid":"0000-0002-2202-4930","position":1,"is_corresponding":false},{"id":342324,"name":"Periannan Kuppusamy","orcid":"0000-0002-3214-0660","position":2,"is_corresponding":false},{"id":1305336,"name":"Yehonatan Zur","orcid":null,"position":3,"is_corresponding":false},{"id":1305337,"name":"Limor Baruch","orcid":null,"position":4,"is_corresponding":false},{"id":1304999,"name":"Marcelle Machluf","orcid":"0000-0001-5896-963X","position":5,"is_corresponding":false},{"id":1305000,"name":"Aharon Blank","orcid":"0000-0003-4056-8103","position":6,"is_corresponding":false},{"id":1305335,"name":"Nir Almog","orcid":null,"position":0,"is_corresponding":true}],"reference_count":30,"raw_metadata":null,"created_at":"2026-07-19T02:05:40.740958Z","pmid":"38411265","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}