A prototype Multi-X-ray-source array (MXA) for digital breast tomosynthesis

The design and testing of a prototype Multi-X-ray-source Array (MXA) for digital breast tomosynthesis is reported. The MXA is comprised of an array of tungsten filament cathodes with focus cup grid-controlled modulation and a common rotating anode housed in a single vacuum envelope. Prototypes consi...

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Bibliographic Details
Published in:Physics in medicine & biology 2020-12, Vol.65 (23), p.235033-235033
Main Authors: Becker, Amy E, Hernandez, Andrew M, Boone, John M, Schwoebel, Paul R
Format: Article
Language:English
Subjects:
Breast Neoplasms - diagnostic imaging
digital breast tomosynthesis
Female
Humans
Mammography - instrumentation
Mammography - methods
multisource x-ray
Phantoms, Imaging
stationary x-ray source
Tomography, X-Ray Computed - instrumentation
Tomography, X-Ray Computed - methods
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Summary:The design and testing of a prototype Multi-X-ray-source Array (MXA) for digital breast tomosynthesis is reported. The MXA is comprised of an array of tungsten filament cathodes with focus cup grid-controlled modulation and a common rotating anode housed in a single vacuum envelope. Prototypes consisting of arrays of three-source elements and eleven-source-elements were fabricated and evaluated. The prototype sources demonstrated focal spot sizes of 0.3 mm at 45 kV with 50 mA. Measured x-ray spectra were consistent with the molybdenum anode employed, and the tube output (air kerma) was between 0.6 mGy/100 mAs at 20 kV and 17 mGy/100 mAs at 45 kV with a distance of 100 cm. HVL measurements ranged from 0.5 mm Al at 30 kV to 0.8 mm Al at 45 kV, and x-ray pulse widths were varied from 20 ms to 110 ms at operating frequencies ultimately to be limited by source turn-on/off times of ∼1 ms. Initial results of reconstructed tomographic data are presented.
ISSN:0031-9155
1361-6560
DOI:10.1088/1361-6560/abc305