Yes / We investigated the potential for digital tomosynthesis (DT) to reduce pediatric x-ray dose while maintaining
image quality. We utilized the DT feature (VolumeRadTM) on the GE DefiniumTM 8000 flat panel system installed in the
Winnipeg Children’s Hospital. Facial bones, cervical spine, thoracic spine, and knee of children aged 5, 10, and 15 years
were represented by acrylic phantoms for DT dose measurements. Effective dose was estimated for DT and for
corresponding digital radiography (DR) and computed tomography (CT) patient image sets. Anthropomorphic phantoms
of selected body parts were imaged by DR, DT, and CT. Pediatric radiologists rated visualization of selected anatomic
features in these images. Dose and image quality comparisons between DR, DT, and CT determined the usefulness of
tomosynthesis for pediatric imaging.
CT effective dose was highest; total DR effective dose was not always lowest – depending how many
projections were in the DR image set. For the cervical spine, DT dose was close to and occasionally lower than DR
dose. Expert radiologists rated visibility of the central facial complex in a skull phantom as better than DR and
comparable to CT. Digital tomosynthesis has a significantly lower dose than CT. This study has demonstrated DT
shows promise to replace CT for some facial bones and spinal diagnoses. Other clinical applications will be evaluated in
the future. / Medical Physics Division at CancerCare Manitoba and GE Healthcare (Waukesha, WI).
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/16967 |
| Date | 03 1900 |
| Creators | Gislason-Lee, Amber J., Elbakri, I.A., Reed, M. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Conference paper, Accepted manuscript |
| Rights | © 2015, Society of Photo-Optical Instrumentation Engineers (SPIE). This is an author produced version of a paper published in Proceedings SPIE 7258, Medical Imaging. Physics of Medical Imaging. |
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