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Measurement of brea...
Measurement of breast-tissue x-ray attenuation by spectral mammography : solid lesions
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Fredenberg, Erik (författare)
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Kilburn-Toppin, Fleur (författare)
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Willsher, Paula (författare)
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Moa, Elin (författare)
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- Danielsson, Mats (författare)
- KTH,Medicinsk bildfysik
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Dance, David R. (författare)
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Young, Kenneth C. (författare)
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Wallis, Matthew G. (författare)
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(creator_code:org_t)
- 2016-03-10
- 2016
- Engelska.
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Ingår i: Physics in Medicine and Biology. - : Institute of Physics Publishing (IOPP). - 0031-9155 .- 1361-6560. ; 61:7, s. 2595-2612
- Relaterad länk:
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https://kth.diva-por... (primary) (Raw object)
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http://kth.diva-port...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Knowledge of x-ray attenuation is essential for developing and evaluating x-ray imaging technologies. For instance, techniques to distinguish between cysts and solid tumours at mammography screening would be highly desirable to reduce recalls, but the development requires knowledge of the x-ray attenuation for cysts and tumours. We have previously measured the attenuation of cyst fluid using photon-counting spectral mammography. Data on x-ray attenuation for solid breast lesions are available in the literature, but cover a relatively wide range, likely caused by natural spread between samples, random measurement errors, and different experimental conditions. In this study, we have adapted a previously developed spectral method to measure the linear attenuation of solid breast lesions. A total of 56 malignant and 5 benign lesions were included in the study. The samples were placed in a holder that allowed for thickness measurement. Spectral (energy-resolved) images of the samples were acquired and the image signal was mapped to equivalent thicknesses of two known reference materials, which can be used to derive the x-ray attenuation as a function of energy. The spread in equivalent material thicknesses was relatively large between samples, which is likely to be caused mainly by natural variation and only to a minor extent by random measurement errors and sample inhomogeneity. No significant difference in attenuation was found between benign and malignant solid lesions. The separation between cyst-fluid and tumour attenuation was, however, significant, which suggests it may be possible to distinguish cystic from solid breast lesions, and the results lay the groundwork for a clinical trial. In addition, the study adds a relatively large sample set to the published data and may contribute to a reduction in the overall uncertainty in the literature.
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
- x-ray imaging
- mammography
- spectral imaging
- photon counting
- tissue
- x-ray attenuation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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