Fixed, object-specific intensity compensation for cone beam optical CT radiation dosimetry.

We present transmission images and solution phantom reconstructions to demonstrate that (1) placing compensators beyond the focal zone of the imaging lens prevents high spatial frequency features of the printed films from generating reconstruction artifacts, and (2) object-specific compensation considerably reduces the range of intensities measured in projection images. This will improve the measurable dose range in optical CT dosimetry, and will enable imaging of larger gel volumes (∼15 cm diameter). Additionally, it should enable re-use of dosimeters by printing a new compensator for a second experiment. PMID: 29547397 [PubMed - in process]

https://www.ncbi.nlm.nih.gov/pubmed/29547397?dopt=Abstract

Source: Physics in Medicine and Biology - March 16, 2018 Category: Physics Authors: Dekker KH, Hazarika R, Silveira MA, Jordan KJ Tags: Phys Med Biol Source Type: research