Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Tissue characterisation"”.
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Dielectric relaxation time spectroscopy for tissue characterisation
… technique for characterising biological tissue and distinguishing pathology. The thesis is focused on the development of an improved method for extracting physiologically related parameters from the measured impedance data in vivo and instrumentation for spectroscopic measurements. In …
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Development of Surface Acoustic Wave Optical Coherence Elastography (SAW-OCE) for Soft Tissue Characterisation
Mechanical properties of biological soft tissues are closely related to their underlying pathological conditions. In clinical practice, they have been widely recognized as a significant indicator to assist disease diagnosis. There has been enormous technical advancement in imaging modalities such …
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Electrical Impedance Spectroscopy with Multi-modal Tissue Discrimination for Ultrasound-Guided Targeted Biopsy
… electrical impedance spectroscopy to identify tissue at the needle tip in real-time, validated on an ex-vivo tissue dataset. Two data augmentation methods are proposed for improving classifiers trained on small datasets. Lastly, the thesis shows the ultrasonic vibrational potential can be …
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Developments in 2D NMR relaxometry and its application to biological tissue
… to distinguish between different biological tissues is established using fresh unpreserved samples of lamb’s liver and kidney. A novel use of 2D T1-T2 relaxation spectra to provide characteristic profiles of specific tissues in specific states of health is proposed and tested in the case of …
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Iterative reconstruction as a novel method of radiation dose reduction at computed tomography in patients with Crohn's disease
… Finally, attenuation measurements in organs, tissues, etc. with each reconstruction algorithm were compared to assess for preservation of tissue characterisation capabilities. In the phantom and cadaveric models, both forms of iterative reconstruction examined (ASiR and MBIR) were superior to …
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Finite element modelling and image reconstruction in single and multi-frequency electrical impedance tomography.
… approach of the single frequency method by which tissue characterisation has been proposed by imaging the internal conductivity of region over a range of frequencies. However, due to instrumentation drawbacks, only the real parts of the boundary voltages are presently measured. These real only …
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Predictors of diffuse myocardial fibrosis in HIV infected persons: A multiparametric cardiovascular magnetic resonance study
… of extracellular volume fraction (ECV) and tissue characterisation to assess diffuse myocardial fibrosis and determine the effect of ART use on diffuse myocardial fibrosis in HIV infected individuals on ART compared to untreated HIV infected persons. Forty-four asymptomatic individuals with …
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Fabrication of Ultrasound Transducers and Arrays Integrated within Needles for Imaging Guidance and Diagnosis
… with regards to the needle position within the tissue, and aid in the safe navigation of needles towards a particular target such as a tumour in tissues such as the breast, brain or liver, at which point decisions surrounding diagnosis or treatment via in vivo tissue characterisation could be …
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Microultrasound Imaging of Tissue Dysplasia
… and measure microscopic changes in precancerous tissue using a mouse small bowel model with an oncogenic mutation was developed. µUS transducer was used to test the hypothesis that the intestinal tissue morphology of WT (wild type) and ApcMin/+ (adenomatous polyposis coli) diverges with …