Abstract
A 2D Compact ultrasound computerized tomography (UCT) system is developed. Fully automatic post-processing tools involving signal and image processing are developed as well. Square of the amplitude values are used in transmission mode with natural 1.5 MHz frequency and rise time 10.4 ns and fall time 8.4 ns and duty cycle of 4.32%. The highest peak to corresponding trough values are considered as transmitting wave between transducers in direct line talk. Sensitivity analysis of methods to extract peak to the corresponding trough per transducer are discussed in this paper. Total five methods are tested. These methods are taken from broad categories: (a) Conventional and (b) Artificial Intelligence (AI) based methods. Conventional methods, namely: (a) simple gradient based peak detection, (b) Fourier based, (c) wavelet transform, are compared with AI based methods: (a) support vector machine (SVM), (b) artificial neural network (ANN). The classification step is performed as well to discard the signal which does not has a contribution to the transmission wave. It is found that AI methods have equally good as compared to conventional methods. Reconstruction error, KT 1error estimates, accuracy, F-Score, recall, precision, specificity and MCC are used. ANN and FFT methods are processing the UCT signal with the best recovery.
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Acknowledgements
MG acknowledge the Science and Engineering Research Board (SERB), Government of India, for providing support with Grant No. ECR/2017/001432. AK like to acknowledge CSIR Research fellowship. We also acknowledge Mr. Utakarsh Vinayak Parkhi’s help in testing preliminary KCNN codes in MATLAB™. AK acknowledges Dr. Snehlata Shakya for her help in KT1 theorem discussions.
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Ankur Kumar: Methodology, Investigation, data measurement, Writing and Analysis, non-AI methods. Prasunika Khare: AI methods and analysis, Mayank Goswami: Methodology, Investigation, Writing, Visualization, Supervision, Funding acquisition.
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Kumar, A., Khare, P. & Goswami, M. AI and Conventional Methods for UCT Projection Data Estimation. J Sign Process Syst 94, 425–433 (2022). https://doi.org/10.1007/s11265-021-01697-5
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DOI: https://doi.org/10.1007/s11265-021-01697-5