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 6 of 6 for “"needle probe"”.
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Near-field scanning optical microscopy with laser trapping
… microscopy with a tapered fibre or a metallic needle probe, particle-trapped near-field scanning optical microscopy offers several advantages such as no need of distance control, high signal collection efficiency, and easy replacement of a particle probe. In consideration of the major problems …
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Electrical Impedance Spectroscopy with Multi-modal Tissue Discrimination for Ultrasound-Guided Targeted Biopsy
… ultrasound (US) is used to place a biopsy needle in lesion(s) identified via MRI for sampling. The lesion is not always visible in US, so proper needle placement is not guaranteed. Thus, false-negative results occur often, causing uncertainty in treatment. This thesis proposes an …
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Segmentation, co-registration, and correlation of optical coherence tomography and X-ray images for breast cancer diagnostics
… to be over a few millimeters. In the case of a needle probe, OCT could provide images of the vicinity of the probe tip, allowing for better localization and identification of abnormal tissue. In the intraoperative case, OCT can be utilized to evaluate tumor margins and lymph nodes that have been …
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Impedance Sensors for Fast Multiphase Flow Measurement and Imaging
… The first one is a complex permittivity needle probe which can detect the phases of a multiphase flow at its probe tip by simultaneous measurement of the electrical conductivity and permittivity at up to 20 kHz repetition rate. Two-dimensional images of the phase distribution in pipe …
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Fabrication of Ultrasound Transducers and Arrays Integrated within Needles for Imaging Guidance and Diagnosis
… (IOUS) systems and their relatively large probes and limited superficial high frequency imaging, the use of a biopsy needle with an integrated transducer that is capable of minimally invasive and high-resolution ultrasound imaging is proposed. Such a design would overcome the compromise …