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Moreover, SBL identifies these sparse frequencies on well-segmented inner slices by optimizing hyperparameters via type-II likelihood, automatically pruning irrelevant components. The identified sparse frequencies guide the selection of outer slice images for labeling, minimizing posterior variance. This work provides performance guarantees for the greedy algorithm. Testing on patient data demonstrates that only a few labeled images are necessary for accurate volume prediction. The labeling procedure effectively avoids selecting inefficient images. Furthermore, the Bayesian approach provides uncertainty estimates, highlighting unreliable predictions (e.g., when choosing suboptimal labels).<\/jats:p>","DOI":"10.1007\/s11222-025-10772-x","type":"journal-article","created":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T19:44:54Z","timestamp":1763408694000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Sparse Bayesian learning for label efficiency in cardiac real-time MRI"],"prefix":"10.1007","volume":"36","author":[{"given":"Anja","family":"Bach","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3637-3231","authenticated-orcid":false,"given":"Achim","family":"Basermann","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7044-6065","authenticated-orcid":false,"given":"Darius A.","family":"Gerlach","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4849-0593","authenticated-orcid":false,"given":"Philipp","family":"Knechtges","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5672-1187","authenticated-orcid":false,"given":"Jens","family":"Tank","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1967-4446","authenticated-orcid":false,"given":"Ra\u00fal","family":"Tempone","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7053-8154","authenticated-orcid":false,"given":"Felix","family":"Terhag","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2025,11,17]]},"reference":[{"issue":"1","key":"10772_CR1","doi-asserted-by":"publisher","first-page":"107","DOI":"10.1214\/aoms\/1177729698","volume":"22","author":"MS Bartlett","year":"1951","unstructured":"Bartlett, M.S.: An Inverse Matrix Adjustment Arising in Discriminant Analysis. 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