Image quality dependency on system configuration and tube voltage in chest tomosynthesis—a visual grading study using an anthropomorphic chest phantom

Medical Physics
Christina SödermanMagnus Båth

Abstract

To investigate the potential benefit of increasing the dose per projection image in chest tomosynthesis, performed at the current standard dose level, by reducing the angular range covered or the projection image density and to evaluate the influence of the tube voltage on the image quality. An anthropomorphic chest phantom was imaged using nine different projection image configurations and ten different tube voltages with the GE VolumeRAD tomosynthesis system. The resulting image sets were representative of being acquired at the same total effective dose. This was achieved partly by applying a simulated dose reduction to the projection images due to restrictions concerning the tube load settings on the VolumeRAD system. Four observers were included in a visual grading study where the reconstructed tomosynthesis section images were rated according to a set of image quality criteria. Image quality was evaluated relative to the default configuration and default tube voltage on the VolumeRAD system. Overall, the image quality decreased with decreasing projection image density. Regarding angular range covered by the projection images, the image quality increased with decreasing angular range for two of the criteria, whereas for a c...Continue Reading

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Citations

Jan 30, 2016·Radiation Protection Dosimetry·Angelica SvalkvistLars Gunnar Månsson
Jan 16, 2016·Radiation Protection Dosimetry·Christina SödermanMagnus Båth
Dec 20, 2015·Radiation Protection Dosimetry·Jonathan ArvidssonMagnus Båth
Jul 28, 2020·Academic Radiology·Maral MirzaiAngelica Svalkvist
Nov 11, 2021·Biomedical Physics & Engineering Express·Thomas G PrimidisCarsten P Welsch

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