{"doi":"10.1002/mrm.29451","title":"Ultra‐short T<sub>2</sub> components imaging of the whole brain using 3D dual‐echo UTE MRI with rosette k‐space pattern","abstract":"Purpose This study aimed to develop a new 3D dual‐echo rosette k‐space trajectory, specifically designed for UTE MRI applications. The imaging of the ultra‐short transverse relaxation time (uT 2 ) of brain was acquired to test the performance of the proposed UTE sequence. Theory and Methods The rosette trajectory was developed based on rotations of a “petal‐like” pattern in the k x –k y plane, with oscillated extensions in the k z ‐direction for 3D coverage. Five healthy volunteers underwent 10 dual‐echo 3D rosette UTE scans with various TEs. Dual‐exponential complex model fitting was performed on the magnitude data to separate uT 2 signals, with the output of uT 2 fraction, uT 2 value, and long‐T 2 value. Results The 3D rosette dual‐echo UTE sequence showed better performance than a 3D radial UTE acquisition. More significant signal intensity decay in white matter than gray matter was observed along with the TEs. The white matter regions had higher uT 2 fraction values than gray matter (10.9% ± 1.9% vs. 5.7% ± 2.4%). The uT 2 value was approximately 0.10 ms in white matter . Conclusion The higher uT 2 fraction value in white matter compared to gray matter demonstrated the ability of the proposed sequence to capture rapidly decaying signals.","journal":"Magnetic Resonance in Medicine","year":2022,"id":249063,"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":29,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9484,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2022-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":817951,"name":"Ali Çağlar Özen","orcid":"0000-0003-3536-0826","position":1,"is_corresponding":false},{"id":818623,"name":"Antonia Sunjar","orcid":null,"position":2,"is_corresponding":false},{"id":817952,"name":"Serhat İlbey","orcid":"0000-0002-3574-4320","position":3,"is_corresponding":false},{"id":268807,"name":"Stephen J. Sawiak","orcid":"0000-0003-4210-9816","position":4,"is_corresponding":false},{"id":568691,"name":"Riyi Shi","orcid":"0000-0002-7297-9428","position":5,"is_corresponding":false},{"id":817953,"name":"Mark Chiew","orcid":"0000-0001-6272-8783","position":6,"is_corresponding":false},{"id":407457,"name":"Uzay E. Emir","orcid":"0000-0001-5376-0431","position":7,"is_corresponding":false},{"id":407452,"name":"Xin Shen","orcid":"0000-0003-0184-8751","position":0,"is_corresponding":true}],"reference_count":62,"raw_metadata":null,"created_at":"2026-07-19T00:24:19.356023Z","pmid":"36161728","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":[]}