Examining an image reconstruction method in infrared emission tomography

Abstract

We present and evaluate the application of the "Reconstructed Image from Simulations Ensemble" (RISE), a novel tomographic image reconstruction method, in infrared tomography. We demonstrate that established methods of photon emission tomography, widely used with penetrating ionizing radiation, are applicable to infrared radiation. RISE, the method of choice, employs statistical physics concepts and utilizes Monte Carlo techniques to construct the imaged object from its infrared planar projections. The validity of the InfraRed Emission Tomographic (IRET) method is demonstrated, and the efficacy of RISE is evaluated with A) simulated data and B) experimental sets of infrared projections obtained from a thermal phantom with an infrared camera. For the simulation studies presented, the reconstructed images obtained with RISE and the well -known Algebraic Reconstruction Technique (ART) and Maximum Likelihood Expectation Maximization (MLEM) method were evaluated using well-established metrics.

Tomographic reconstruction from planar thermal imaging using convolutional neural network

“…In all previous studies on thermal tomography, the shape of an object was simplified to a cylindrical form 13 , 15 , 16 . We used the same approach here, but the proposed method itself does not have to be limited to one shape.…”

“…To assess our framework, we employed several well established metrics. Three were taken from Koutsantonis et al 16 : normalized mean square error (NMSE), correlation coefficient (CC), being a spatial similarity measure between two images, and peak signal-to-noise ratio (PSNR). From Wang et al 40 , we adopted the structural similarity index (SSIM).…”

“…3D thermal imaging techniques described in the literature generally embrace three categories: (1) combination of 2D IR imaging and depth data 10 – 14 , (2) reconstruction based on sensors attached to the object surface 15 , and (3) reconstruction from a series of 2D IR images (thermal tomography) 16 , 17 . The first group returns the spatial shape and surface temperature distribution, while the other two address the temperature distribution within the object.…”

“…This paper falls into this category, in which only individual studies have been reported so far. Koutsantonis et al 16 presented a tomographic image reconstruction method in IR tomography, called RISE (Reconstructed Image from Simulations Ensemble), combining statistical physics concepts and Monte Carlo methods. The goal was to extract the physical parameters of an object and simulate a pack of image configurations corresponding to a tomographic problem solution.…”

Συνεισφορά της οπτικής τoμογραφίας OCT (optical computed tomography) στην μονοφωτονική τομοσπινθηρογραφία

“…As a result, the obtained infrared images from a source below a certain depth in the body are blurred and of low-resolution. However, recent results with novel reconstruction methods based on statistical physics concepts and utilizing Monte Carlo techniques show promising reliability and efficiency also in the case of strong light absorption and diffusion [KOU19].…”