{"doi":"10.2463/mrms.mp.2023-0158","title":"Fast Non-contrast MR Angiography Using a Zigzag Centric &lt;i&gt;k&lt;/i&gt;&lt;sub&gt;y&lt;/sub&gt; – &lt;i&gt;k&lt;/i&gt;&lt;sub&gt;z&lt;/sub&gt; &lt;i&gt;k&lt;/i&gt;-space Trajectory and Exponential Refocusing Flip Angles with Restoration of Longitudinal Magnetization","abstract":"PURPOSE: k-space trajectory (cFBI) and an exponential refocusing flip angle (eFA) scheme with fast longitudinal restoration. METHODS: k-space trajectory. After optimizations, cFBI images were compared against standard FBI (sFBI) images in terms of scan time, motion artifacts, Nyquist N/2 artifacts, blurring, and overall image quality. We also performed two-way repeated measures analysis of variance. RESULTS: cFBI with eFA achieved nearly a 50% scan time reduction compared to sFBI. The high/low flip angle of 180/2 degrees with lower refocusing pulses shows fast longitudinal restoration with the highest blood signals, yet also more sensitive to the background signals. Overall, 180/30 degrees images show reasonable blood signal recovery while minimizing the background signal artifacts. After the trigger delay optimization, maximum intensity projection image of cFBI after systole-diastole subtraction demonstrates less motion and N/2 artifacts than that of sFBI. CONCLUSION: Together with eFA for fast longitudinal signal restoration, the proposed cFBI technique achieved a 2-fold reduction in scan time and improved image quality without major artifacts.","journal":"Magnetic Resonance in Medical Sciences","year":2024,"id":469049,"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":3,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9568,"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":1301640,"name":"Diana Vucevic","orcid":"0000-0001-8291-7610","position":1,"is_corresponding":false},{"id":749360,"name":"Won C. Bae","orcid":"0000-0003-2616-0339","position":2,"is_corresponding":false},{"id":902638,"name":"Asako Yamamoto","orcid":"0000-0003-4500-0269","position":3,"is_corresponding":false},{"id":1146183,"name":"Yoshimori Kassai","orcid":"0000-0003-1270-8084","position":4,"is_corresponding":false},{"id":1300601,"name":"John S. Lane","orcid":null,"position":5,"is_corresponding":false},{"id":365032,"name":"Albert Hsiao","orcid":"0000-0002-9412-1369","position":6,"is_corresponding":false},{"id":1300600,"name":"Katsumi Nakamura","orcid":null,"position":7,"is_corresponding":false},{"id":902639,"name":"Mitsue Miyazaki","orcid":"0000-0002-5690-694X","position":8,"is_corresponding":false},{"id":371315,"name":"Vadim Malis","orcid":"0000-0002-0426-1457","position":0,"is_corresponding":true}],"reference_count":42,"raw_metadata":null,"created_at":"2026-07-19T02:05:28.027781Z","pmid":"39231732","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":[]}