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Performance of breast cancer screening using digital breast tomosynthesis: results from the prospective population-based Oslo Tomosynthesis Screening Trial
- P. Skaane, S. Sebuødegård, +4 authors S. Hofvind
- Breast Cancer Research and Treatment
- 10 February 2018
DBT-supplemented screening resulted in significant increases in screen-detected cancers and specificity, however, no significant change was observed in the rate, size, node status, or grade of interval cancers. Expand
A proposed protocol for acceptance and constancy control of computed tomography systems: A Nordic Association for Clinical Physics (NACP) work group report
A comprehensive QA protocol for CT systems is proposed, including both acceptance and constancy tests, and may serve as a reference for medical physicists in the Nordic countries. Expand
Digital Mammography versus Digital Mammography Plus Tomosynthesis in Breast Cancer Screening: The Oslo Tomosynthesis Screening Trial.
Addition of digital breast tomosynthesis to digital mammography resulted in significant gains in sensitivity and specificity, and Synthetic mammography in combination with digital breastTomosynthesis had similar sensitivity and Specificity to digital Mammography in conjunction with computer-aided detection. Expand
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…
- B. H. Østerås, P. Skaane, R. Gullien, A. C. Martinsen
- Physics in medicine and biology
- 25 January 2018
The main purpose was to compare average glandular dose (AGD) for same-compression digital mammography (DM) and digital breast tomosynthesis (DBT) acquisitions in a population based screening program,… Expand
Classification of fatty and dense breast parenchyma: comparison of automatic volumetric density measurement and radiologists’ classification and their inter-observer variation
The optimal volumetric threshold of 10% using automatic assessment would classify breast parenchyma as fatty or dense with substantial accuracy and consistency compared to radiologists’ BI-RADS categorization, which suffers from high inter-observer variation. Expand
BI-RADS Density Classification From Areometric and Volumetric Automatic Breast Density Measurements.
- B. H. Østerås, A. C. Martinsen, +5 authors P. Skaane
- Computer Science, Medicine
- Academic radiology
- 1 April 2016
Thresholds found in this study can be applied in daily practice to automatic measurements of density to estimate BI-RADS classification and are equal to or better than areometric assessment for the most clinically relevant thresholds. Expand
Digital Mammography versus Breast Tomosynthesis: Impact of Breast Density on Diagnostic Performance in Population-based Screening.
Digital breast tomosynthesis enabled the detection of more cancers in all density and age groups compared with digital mammography, especially cancers classified as spiculated masses and architectural distortions. Expand
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
Utilization of a power injector, thus allowing the operator to step back from the patient, facilitates a radiation dose reduction to the operator of approximately 50% with no significant increase in patient dose or procedure time during pelvic procedures. Expand
Can use of adaptive statistical iterative reconstruction reduce radiation dose in unenhanced head CT? An analysis of qualitative and quantitative image quality
- B. H. Østerås, Kristin Livelten Heggen, H. K. Pedersen, H. K. Andersen, A. C. Martinsen
- Acta radiologica open
- 1 August 2016
There was no significant difference in qualitative image quality between full dose FBP and dose reduced ASIR, and CNR improved in DR ASIR compared to FD FBP mostly due to increased contrast, not reduced noise. Expand
Quantitative Measurements Versus Receiver Operating Characteristics and Visual Grading Regression in CT Images Reconstructed with Iterative Reconstruction: A Phantom Study.
Improved quantitative measurements in images reconstructed with iterative reconstruction compared to FBP are not equivalent to improved diagnostic image accuracy. Expand