Laser beam optical CT scanner for in-air gel readout: imaging artefacts

7th International Conference on 3D Radiation Dosimetry

Ramm, D.^1,2

Department of Medical Physics, Royal Adelaide Hospital Cancer Centre, SA, Australia^1

School of Chemistry and Physics, University of Adelaide, SA, Australia^2

关键词: Cylinder surface;    Field of views;    Optical CT;    Polished surfaces;    Projection data;    Scanning optical;    Scratch resistance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012078/pdf
DOI  :  10.1088/1742-6596/444/1/012078

来源: IOP

【 摘 要 】

Ongoing progress on development of an in-air scanning optical CT is reported, specifically dealing with the minimization of scanner imaging artefacts. Improved scratch resistance of the PMMA gel cylinder was a primary goal, so that routine cleaning would not degrade the polished surfaces. This was achieved by the addition of a hard coating to the cylinder surfaces. New artefacts were introduced and subsequently reduced by alternative processing of projection data. The outcome was a gel cylinder of much greater practicality for routine use while maintaining similar signal to noise ratios and uniformity in the image reconstruction field of view.