Bjørn Helge Østerås
- CT/X-ray Physicist; PhD
Publications 2023
Use of ionizing radiation in a Norwegian cohort of children with congenital heart disease: imaging frequency and radiation dose for the Health Effects of Cardiac Fluoroscopy and Modern Radiotherapy in Pediatrics (HARMONIC) study
Pediatr Radiol, 53 (12), 2502-2514
DOI 10.1007/s00247-023-05774-8, PubMed 37773444
Metal artifact reduction on musculoskeletal CT: a phantom and clinical study
Eur Radiol Exp, 7 (1), 46
DOI 10.1186/s41747-023-00354-9, PubMed 37524994
Discordant and false-negative interpretations at digital breast tomosynthesis in the prospective Oslo Tomosynthesis Screening Trial (OTST) using independent double reading
Eur Radiol, 34 (6), 3912-3923
DOI 10.1007/s00330-023-10400-0, PubMed 37938385
Publications 2019
Digital Mammography versus Digital Mammography Plus Tomosynthesis in Breast Cancer Screening: The Oslo Tomosynthesis Screening Trial
Radiology, 291 (1), 23-30
DOI 10.1148/radiol.2019182394, PubMed 30777808
Digital Mammography versus Breast Tomosynthesis: Impact of Breast Density on Diagnostic Performance in Population-based Screening
Radiology, 293 (1), 60-68
DOI 10.1148/radiol.2019190425, PubMed 31407968
Publications 2018
Performance of breast cancer screening using digital breast tomosynthesis: results from the prospective population-based Oslo Tomosynthesis Screening Trial
Breast Cancer Res Treat, 169 (3), 489-496
DOI 10.1007/s10549-018-4705-2, PubMed 29429017
Average glandular dose in paired digital mammography and digital breast tomosynthesis acquisitions in a population based screening program: effects of measuring breast density, air kerma and beam quality
Phys Med Biol, 63 (3), 035006
DOI 10.1088/1361-6560/aaa614, PubMed 29311416
Publications 2017
Quantitative Measurements Versus Receiver Operating Characteristics and Visual Grading Regression in CT Images Reconstructed with Iterative Reconstruction: A Phantom Study
Acad Radiol, 25 (4), 509-518
DOI 10.1016/j.acra.2017.10.020, PubMed 29198945
Publications 2016
Can use of adaptive statistical iterative reconstruction reduce radiation dose in unenhanced head CT? An analysis of qualitative and quantitative image quality
Acta Radiol Open, 5 (8), 2058460116645831
DOI 10.1177/2058460116645831, PubMed 27583169
[Radiation-induced cataracts]
Tidsskr Nor Laegeforen, 136 (21), 1809-1812
DOI 10.4045/tidsskr.16.0307, PubMed 27883104
Classification of fatty and dense breast parenchyma: comparison of automatic volumetric density measurement and radiologists' classification and their inter-observer variation
Acta Radiol, 57 (10), 1178-85
DOI 10.1177/0284185115626469, PubMed 26792823
BI-RADS Density Classification From Areometric and Volumetric Automatic Breast Density Measurements
Acad Radiol, 23 (4), 468-78
DOI 10.1016/j.acra.2015.12.016, PubMed 26847741
Publications 2012
A proposed protocol for acceptance and constancy control of computed tomography systems: a Nordic Association for Clinical Physics (NACP) work group report
Acta Radiol, 54 (2), 188-98
DOI 10.1258/ar.2012.120254, PubMed 23160544
Step back from the patient: reduction of radiation dose to the operator by the systematic use of an automatic power injector for contrast media in an interventional angiography suite
Acta Radiol, 53 (3), 330-4
DOI 10.1258/ar.2011.110560, PubMed 22334873
Publications 2006
EPR dosimetry of radiotherapy photon beams in inhomogeneous media using alanine films
Phys Med Biol, 51 (24), 6315-28
DOI 10.1088/0031-9155/51/24/003, PubMed 17148820