Octagon Modelling Using Parallel Projection of Optical Tomography

Fadzil, Naizatul Shima Mohd; Rahim, Ruzairi Abdul; Jamaludin, Juliza; Muji, Siti Zarina Mohd; Sahib, Mohd Fadzli Abdul; Mansor, Mohd Saiful Badri; Ayob, Nor Muzakkir Nor; Jumaah, Mohd Fahajumi; Aw, Suzanna Ridzuan; Zawahir, Mohd Zikrillah

doi:10.11113/jt.v70.3457

Cited by 2 publications

(1 citation statement)

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“…As for normalized sensitivity maps, they are created to be multiplied with the voltage loss value from the sensors. Sensitivity maps are a set of matrix that represents the pathway of the projection light from the transmitter to the receiver 12 . To develop the sensitivity maps, the dimensions of the sensor location are important where virtual projection is based on the identified projection pathway.…”

Section: Figure 1 Typical Computed Tomography Systemmentioning

confidence: 99%

Fixed-point Sensitivity Maps for Image Reconstruction in Tomography

et al. 2015

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This study proposes new fixed-point sensitivity maps for image reconstruction in optical tomography systems by using a linear back projection (LBP) algorithm. The projection selected is based on fan beam orientation with 16 pairs of transmitters and receivers. Many optical tomography systems previously published, focused on microcontroller implementations, which have limited processing speed for real time systems to be used in critical applications such as underwater gas transmission pipeline. To gain benefits from parallel processing in digital hardware implementations such as using FPGA or ASIC, slight modification must be done in the reconstructed images mechanism. The normalized sensitivity maps for image reconstruction are recreated without using floating numbers to optimize the digital design implementations. By multiplying the sensitivity maps matrix with 128, the new sensitivity maps matrices are developed and rounding processes are performed to eliminate floating numbers. The error was determined using Normalized Mean Square Error (NMSE) and the results show that the new fixed-point sensitivity maps produced comparable image reconstruction quality for optical tomography systems with NMSE values of 1.88 × 10-7 and 0.02 for phantoms (a) and (b) respectively.

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Section: Figure 1 Typical Computed Tomography Systemmentioning

confidence: 99%