Imagine of small children prototype for photon counting tomosynthesis
2009 (English)In: Medical Imaging 2009: Physics of Medical Imaging, 2009, Vol. 7258, 72581-9 p.Conference paper (Refereed)
We present data on a first prototype for photon counting tomosynthesis imaging of small children, which we call photoncounting tomosynthesis (PCT). A photon counting detector can completely eliminate electronic noise, which makes it ideal for tomosynthesis because of the low dose in each projection. Another advantage is that the detector allows for energy sensitivity in later versions, which will further lower the radiation dose. In-plane resolution is high and has been measured to be 5lp/mm, at least 4 times better than in CT, while the depth resolution was significantly lower than typical CT resolution. The image SNR decreased from 30 to 10 for a detail of 10 mm depth in increasing thickness of PMMA from 10 to 80 mm. The air kerma measured for PCT was 5.2 mGy, which leads to an organ dose to the brain of approximately 0.7 mGy. This dose is 96 % lower than a typical CT dose. PCT can be appealing for pediatric imaging since young children have an increased sensitivity to radiation induced cancers. We have acquired post mortem images of a newborn with the new device and with a state-of-the-art CT and compared the diagnostic information and dose levels of the two modalities. The results are promising but more work is needed to provide input to a next generation prototype that would be suitable for clinical trials.
Place, publisher, year, edition, pages
2009. Vol. 7258, 72581-9 p.
, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, ISSN 16057422 ; 7258
Pediatric imaging, Photon counting, Tomosynthesis
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-86524DOI: 10.1117/12.813677ScopusID: 2-s2.0-66749143087OAI: oai:DiVA.org:kth-86524DiVA: diva2:500816
Medical Imaging 2009: Physics of Medical Imaging. Lake Buena Vista, FL. 9 February 2009 - 12 February 2009
QC 201203072012-02-132012-02-132012-03-07Bibliographically approved