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 20 of 33 for “"Image-Guidance"”.
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Image guidance in cardiac electrophysiology
Cardiac arrhythmias are characterized by a disruption or abnormal conduction of electrical signals within the heart. Treatment of arrhythmias has dramatically evolved over the past half-century, and today, minimally-invasive catheter-based therapy is the preferred method of eliminating arrhythmias. …
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Techniques For Sensor-Integrated Robotic Systems: Raman Spectra Analysis, Image Guidance, And Kinematic Calibration
… due to indirect robotic manipulation (e.g., images of the target environment), and robots can provide suitably precise positioning of an analytical sensor.</p> <p>To have an effective sensor-integrated robotic system, multiple capabilities are needed in the areas of sensors, robotics, and …
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Evaluation of external ventricular drain complications and the use of a procedure-targeted image-guidance system
… with the occasional use of a Ghajar guide for guidance support. In the operating room, ventriculostomy may be performed with an image-guidance system, whether optical or electromagnetic. The most common complications of ventriculostomy are hemorrhage and infection. It is unclear whether …
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Hepatocellular Carcinoma Image-Guided Intervention: Quantitative Characterization of Reagents For Thermochemical Ablation
… makes monitoring the delivery of TCA difficult. Image-guided delivery of TCA can help ensure complete ablation of the tumor and margins for assessment of therapeutic response. This research seeks to address these limitations in image guidance by developing novel theranostic agents that provide …
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Bioelectrical strategies for image-guided therapies
… developed two novel localization methods for the guidance of cardiac ablation and other minimally-invasive therapies. The first method, the Inverse Solution Guidance Algorithm (ISGA), is for the non-invasive and rapid localization of the site of origin of an arrhythmia and an ablation catheter tip …
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Goggle Augmented Imaging and Navigation System for Fluorescence-Guided Surgery
… displays accurately aligned, color-fluorescence images via a head-mounted display worn by the surgeon, in real-time. GAINS is a platform technology and capable of very sensitive fluorescence detection. Image display options include both video see-through and optical see-through head-mounted …
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Score Distillation via DDIM Inversion
… diffusion models generate realistic, high-detail images, 3D shape generation methods like Score Distillation Sampling (SDS) built on these 2D diffusion models produce cartoon-like, over-smoothed shapes. To help explain this discrepancy, in this paper we prove that the image guidance used in Score …
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Optical Imaging Of Tissue Physiology With Exogenous Contrast Agents
… The new methodology could be useful for image guidance during tumor resection surgery, and could also provide rapid and useful constraining information for more comprehensive fluorescent tomography.
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Moving Phantom Study of Stereotactic Body Radiation Therapy for Lung Cancer
… motion in the maximum intensity projection (MIP) images generated from 4DCT, which could not be corrected by CBCT. A method of Extended Distance Virtual Isocenter (EDVI) was developed to lower the toxicity of healthy tissues. In all, caution should be used when planning from 4DCT images in the …
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Safe anatomy-driven tracking for navigation and robotics in medical and surgical procedures
… and computer vision to deliver accurate image guidance for diagnostic and interventional medical procedures. The first system is a low-cost, articulated-arm neurosurgical navigation system for external ventricular drain (EVD) placement. Using a novel skull-mounting mechanism, the device …
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Design and development of systems and methods for interventional surgical robot
… that are performed interventionally using image guidance. Inadequate visual and force feedback, while navigating surgical tools during endovascular (guidewire/catheter) procedures, elevates the risk of surgical error. Further, long-term exposure to x-ray and radiation is a potential …
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Detection of prostate cancer using multi-parametric magnetic resonance
… From these MR sequences, 4 sets of image intensities were obtained: T2-weighted(T2W) from T2-weighted imaging, Apparent Diffusion Coefficient(ADC) from LSDI, and Proton Density (PD) and T2 (T2Map) from T2-mapping imaging. Manually- segmented tumor labels from a radiologist were …
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Feasibility of Spinal Neuronavigation and Evaluation of Registration and Application Error Modalities Using Optical Topographic Imaging
… and clinical utility. A novel technique for image-to-patient registration has recently been developed, based on optical topographic imaging (OTI). Whether OTI-based CAN is able to provide accurate intra-operative image-guidance for common spinal procedures, while addressing current …
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Renal Cryoablation: Investigation of Periprocedural Visualization to ols and Treatment Response Quantification
… cryoablations have been performed with image guidance from CT, ultrasound, and MRI. During the MRI-guided cryoablation procedure, the interventional radiologist visually compares the iceball size on monitoring images with respect to the original tumor on separate planning images. The …
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Image-Guided Proton Therapy For Online Dose-Evaluation and Adaptive Planning
… Therefore, this project aims to develop image-guidance techniques for proton therapy that incorporates proton range changes to allow for accurate treatment-time dose verification and corrective actions to ensure proper dose delivery.</p> <p>A method for quick estimation of the …
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Advanced Techniques for Cardiovascular Magnetic Resonance Imaging in Cases of Irregular Motion
… been shown to provide valuable information for image-guided ablation therapy used to treat patients suffering from cardiac arrhythmia. This requires isotropic high resolution anatomical information about complex structures such as atria and pulmonary veins. In addition, the visual-isation of …
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Exploring the Role of GD-EOB-DTPA (Primovist®) MRI in Liver Stereotactic Body Radiation Therapy Accuracy
… the number of treatments, motion management, and image guidance can vary across cancer centers. Due to this, the delivery accuracy can also vary across different practices of liver SBRT implementation. The Primovist®-enhanced MRI allows for the direct visualization of the radiation deposition …
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The Potential for Ultrasonic Image-Guided Therapy Using a Diagnostic System
… are compared with diagnostic controls using image contrast, face heating, hydrophone, and ARFI displacement measurements. From these results, we conclude that the most promising design is a passively and actively cooled, PZT-4 multilayer composite transducer, while the acoustically lossless …
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