Image Reconstruction Comparison on Quantity of Ultrasonic Transceiver Tomography in Non-invasive Imaging of Liquid/Gas Flow PDF Download
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Author: Jasuman Pusppanathan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jasuman Pusppanathan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Ruzairi Abdul Rahim
Publisher: Penerbit UTM Press
ISBN: 9835208360
Category : Image processing
Languages : en
Pages : 5
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Book Description
Real–time process monitoring plays a dominant role in many areas of industry and scientific research concerning liquid/gas two–phase flow. It is proven that the operation efficiency of a process is closely related to accurate measurement and control of hydrodynamic parameters such as flow regime and flow rate. Ultrasonic tomography has the potential for imaging liquid/gas flows. One of the advantages of ultrasonic tomography includes having the capability of performing non–invasive measurement. This book presents a detailed study on ultrasonic tomography, including the principle, design and development. The ultrasonic tomography system comprises 16–pairs of ultrasonic transducers, the electronic measurement circuits, the data–acquisition system and several image reconstruction algorithms. The measurement of the flows was conducted in real–time. The system was capable of visualizing the internal characteristics of liquid and gas flow and provides the concentration profile for the corresponding flows. The results obtained are useful for online monitoring of liquid/gas flows for flow regime identification, chemical mixture transportation or fluid transportation at sub–sea oil fields.
Author: Jaysuman Pusppanathan @ Muhammad Jaysuman Pusppanathan
Publisher:
ISBN:
Category : Ultrasonic testing
Languages : en
Pages : 164
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Book Description
Author: Lean Thiam Siow
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
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Book Description
The main objective of this research project is to employ the non-invasive type ultrasonic imaging system for determining the liquid/gas two-phase medium. It is designed to use 16 ultrasonic transducers as the transmitters and 16 ultrasound transducers as the receivers, together with the data acquisition system and the electronic circuitry system together with a supportive application software for image reconstruction. The particular objectives of this thesis are to develop a non-invasive ultrasonic tomography system for liquid/gas two-phase medium using glass fibre reinforced epoxy composite process column; to examine the effects of temperature variation on ultrasonic tomography sensor by reconstructing the tomographic images; to evaluate the performance of the ultrasonic tomography reconstructed images for liquid/gas two-phase static medium in the composite process column.
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1170
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Author: Thomas Paul Matthews
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 146
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Book Description
Ultrasound computed tomography (USCT) and photoacoustic computed tomography (PACT) are two emerging imaging modalities that have a wide range of potential applications from pre-clinical small animal imaging to cancer screening in human subjects. USCT is typically employed to measure acoustic contrasts, including the speed of sound (SOS) distribution, while PACT typically measures optical contrasts or some related quantity such as the initial pressure distribution. Their complementary contrasts and similar implementations make USCT and PACT a natural fit for a hybrid imaging system. Still, much work remains to realize this promise. First, USCT image reconstruction methods based on the acoustic wave equation, known as waveform inversion methods, are computationally burdensome, limiting their widespread use. Instead, image reconstruction methods based on geometric acoustics are often employed. These methods do not model higher-order diffraction effects and consequentially have poor resolution. In this dissertation, use of a novel stochastic optimization method, which overcomes much of the computational burden of waveform inversion, is proposed. Second, most traditional PACT image reconstruction algorithms assume a constant SOS distribution. For many biological applications, this is a poor assumption that can result in reduced resolution, reduced contrast, and an increase in the number of imaging artifacts. More recent image reconstruction algorithms can compensate for a known heterogeneous SOS distribution; however, in practice, the SOS distribution is not known. Further, in general, the joint reconstruction (JR) of the SOS and initial pressure distributions from PACT measurements is unstable. Two methods are proposed to overcome this problem. In the first, a parameterized JR method is employed. Under this approach, the SOS distribution is assumed to have a known low-dimensional representation. By constraining the form of the SOS distribution, the JR problem can be made more stable. In the second method, few-view USCT measurements are added to the PACT data, and the initial pressure and SOS distributions are jointly estimated from the combined measurements. This approach effectively exploits acoustic information present in the PACT data, allowing both the initial pressure and SOS distributions to be more accurately reconstructed.
Author: Huawen Gai
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Böhm, Christian
Publisher: KIT Scientific Publishing
ISBN: 3731510545
Category : Science
Languages : en
Pages : 296
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Book Description
Ultrasound Tomography is an emerging technology for medical imaging that is quickly approaching its clinical utility. Research groups around the globe are engaged in research spanning from theory to practical applications. The International Workshop on Medical Ultrasound Tomography 2019 brought together scientists to exchange their knowledge and discuss new ideas and results in order to boost the research in Ultrasound Tomography.
Author: Hopp, Torsten
Publisher: KIT Scientific Publishing
ISBN: 3731506890
Category :
Languages : en
Pages : 424
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Book Description
Author: Nor Muzakkir Nor Ayob
Publisher:
ISBN:
Category : Tomography
Languages : en
Pages : 148
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Book Description
The principal target of this research is to further exploit the capability of ultrasonic tomography imaging technique in providing valuable informationwith on-line monitoring solutionwhich can be deem as accountable feedback for improved process control to deter orminimise such maintenance process that arises. The potential of such system in determining the liquid and gas distribution as well as imaging the flow activities should have a widespread use such as food and beverage, oil and gas industries, petrochemical, water distribution, research laboratories and many more.
