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High-attenuation artifact reduction in breast tomosynthesis using a novel reconstruction algorithm
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- Dustler, Magnus (författare)
- Lund University,Lunds universitet,Diagnostisk radiologi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Diagnostic Radiology, (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine,Medical Radiation Physics, Malmö,Lund University Research Groups
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- Wicklein, Julia (författare)
- Siemens Healthineers
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- Förnvik, Hannie (författare)
- Lund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups,Skåne University Hospital
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- Elsevier BV, 2019
- 2019
- Engelska 6 s.
- Ingår i: European Journal of Radiology. - : Elsevier BV. - 0720-048X. ; 116, s. 21-26
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Purpose: To assess the effect on reducing the out-of-plane artifacts from metal objects in breast tomosynthesis (BT)using a novel artifact-reducing reconstruction algorithm in specimen radiography. Methods and Materials: The study was approved by the Regional Ethical Review Board. BT images of 18 partial- and whole mastectomy specimens from women with breast cancer were acquired before and after a needle was inserted close to the lesion. The images were reconstructed using both a standard reconstruction algorithm, and a novel algorithm; the latter uses pre-segmentation to remove highly attenuating artifact-inducing objects from projection images before reconstruction. Images were separately reconstructed with and without segmentation, and combined into an artifact-reduced reconstruction. Standard and artifact-reduced BT-algorithms were compared visually and quantitatively using clinical images of mastectomy specimens and a physical anthropomorphic phantom. Six readers independently assessed the visibility of the lesion with and without artifact-reduction in a side-by-side comparison. A quantitative analysis was performed, comparing the signal-difference to background ratio (SDBR)and artifact spread function (ASF)between the two reconstruction methods. Results: The magnitude of out-of-plane artifacts was clearly reduced with the novel reconstruction compared to BT-images without artifact reduction. Lesion masking by artifacts was largely averted; tumour visibility was comparable to standard BT images without a needle. In 76 ± 8% (standard deviation)of cases overall, readers could confidently state needle location. The same figure was 94 ± 6% for whole mastectomy cases, compared to 62 ± 17% for partial mastectomies. With metal artifact reduction, SDBR increased by 97% in the phantom, and by 69% in the mastectomies. The artifact spread function was substantially narrower. Conclusion: Artifact reduction in BT using a novel reconstruction method enables qualitatively and quantitatively improved clinical use of BT when metal artifacts can be a limiting factor such as in tomosynthesis-guided biopsy.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Nyckelord
- Artifact reduction
- Breast imaging
- Breast tomosynthesis
- Image reconstruction
- Mammography
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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- European Journal of Radiology (Sök värdpublikationen i LIBRIS)
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- Dustler, Magnus
- Wicklein, Julia
- Förnvik, Hannie
- Boita, Joana
- Bakic, Predrag
- Lång, Kristina
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