{"doi":"10.1109/tmi.2020.3008329","title":"Free-Breathing and Ungated Dynamic MRI Using Navigator-Less Spiral SToRM","abstract":"We introduce a kernel low-rank algorithm to recover free-breathing and ungated dynamic MRI from spiral acquisitions without explicit k-space navigators. It is often challenging for low-rank methods to recover free-breathing and ungated images from undersampled measurements; extensive cardiac and respiratory motion often results in the Casorati matrix not being sufficiently low-rank. Therefore, we exploit the non-linear structure of the dynamic data, which gives the low-rank kernel matrix. Unlike prior work that rely on navigators to estimate the manifold structure, we propose a kernel low-rank matrix completion method to directly fill in the missing k-space data from variable density spiral acquisitions. We validate the proposed scheme using simulated data and in-vivo data. Our results show that the proposed scheme provides improved reconstructions compared to the classical methods such as low-rank and XD-GRASP. The comparison with breath-held cine data shows that the quantitative metrics agree, whereas the image quality is marginally lower.","journal":"IEEE Transactions on Medical Imaging","year":2020,"id":101620,"datarank":0.49983067652628066,"base_score":3.332204510175204,"endowment":3.332204510175204,"self_citation_contribution":0.49983067652628066,"citation_network_contribution":0.0,"self_endowment_contribution":0.49983067652628066,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":27,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9482,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":497349,"name":"Ruixi Zhou","orcid":"0000-0001-9231-4987","position":1,"is_corresponding":false},{"id":106869,"name":"Yang Yang","orcid":"0000-0002-2841-4243","position":2,"is_corresponding":false},{"id":386125,"name":"Prashant Nagpal","orcid":"0000-0002-7966-2554","position":3,"is_corresponding":false},{"id":225213,"name":"Michael Salerno","orcid":"0000-0001-7051-1031","position":4,"is_corresponding":false},{"id":275191,"name":"Mathews Jacob","orcid":"0000-0001-6196-3933","position":5,"is_corresponding":false},{"id":497348,"name":"Abdul Haseeb Ahmed","orcid":"0000-0002-7037-9621","position":0,"is_corresponding":true}],"reference_count":30,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-07-18T22:40:22.678835Z","pmid":"32746136","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":[]}