English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Positron Emission Mammography imaging system (PEMi) is a nuclear medicinediagnosis method dedicated for breast imaging. It provides a better resolutionin detection of millimeter-sized breast tumors than whole-body PET. To addressthe requirement of semi-quantitative analysis with the radiotracerconcentration map of the breast, a new attenuation correction method based onthree-dimensional seeded region growing image segmentation (3DSRG-AC) solutionwas developed. The method gives a 3D connected region as the segmentationresult instead of image slices. The continuously segmentation property makesthis new method free of activity variation of breast tissues. Threshold valuechosen is the key point for the segmentation process. The first valley of thegrey level histogram of the reconstruction image is set as the lower threshold,which works fine in clinical application. Results show that attenuationcorrection for PEMi improves the image quality and the quantitative accuracy ofradioactivity distribution determination. Attenuation correction also improvesthe probabilities to detect small and early breast tumors.

Attenuation correction with Region Growing Method used in the Positron Emission Mammography System