The researchers built a multicontrast chest x-ray system that can provide conventional absorption contrast, differential phase contrast, and dark-field x-ray contrast images in a single acquisition. They implemented several technical innovations to achieve data acquisition of the entire chest with a coverage of 28 cm along the superior-inferior direction within four seconds. Initial imaging tests were performed using a chest phantom.
The estimated air kerma and effective dose were well below the effective dose for a typical chest x-ray and the quality of the absorption contrast images matched conventional chest x-rays, the group found.
"A new prototype multicontrast [chest x-ray] system was developed to enable low radiation dose and fast scans of human chest-sized objects within four seconds," Zhang and colleagues noted.
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This paper received a Roadie 2021 award for the most popular abstract by page views in this Road to RSNA section.