Optical tomography hardware development for solid gas measurement using mixed projection

• Published in: Flow measurement and instrumentation Vol. 33; pp. 110 - 121
• Main Authors: Muji, S.Z.M., Goh, C.L., Ayob, N.M.N., Rahim, R.A., Rahiman, M.H.F., Rahim, H.A., Pusppanathan, M.J., Fadzil, N.S.M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2013
• ISSN: 0955-5986; 1873-6998
• DOI: 10.1016/j.flowmeasinst.2013.05.003

The ability to implement fan beam projection in parallel view in an optical tomography setup is one of the novelties of this research. This design involves a sensor jig specifically designed for parallel applications that does not involve a collimator. Therefore, the fan beam projections can also be implemented in the same sensor jig without difficulty. This method is a very practical solution for overcoming the disadvantages of parallel beam projection. Although the fan beam has its own disadvantages, combining the fan beam approach with the parallel beam approach is expected to further enhance the optical tomography image quality. The image quality can be measured using the Peak Signal-to-Noise Ratio (PSNR) and the Normalized Mean-Square Error (NMSE) parameters. The combination of the two approaches also eliminates the unwanted noise that appears when using parallel beam projection alone. The ability to implement a fan beam projection in parallel view is one of the novelties in this research. This design involves a sensor jig designed specifically for parallel applications that does not involve collimator design. Therefore the fan beam can also be implemented in the same sensor jig without difficulty. The method to overcome the disadvantages of parallel beam projection seems to be a very practical solution to the problems that arise in a parallel beam. [Display omitted] •A fan beam projection in parallel view.•The design involves a sensor jig designed specifically for parallel applications that does not involve collimator design.•A practical solution to overcome parallel beam projection disadvantages.