Developing a high-performance patient-to-image registration system for robotic cochlear implant surgery: Through the human-robot interaction-focused design method leading to a multi-modal, multi-feedback admittance control, touch-based pair-point bone-anchored fiducial registration and its performance measured in accuracy, workload, usability and trust

This thesis presents the research to design a successful high-accuracy, sub-millimetric registration method for an autonomous robot equipped to drill bone for cochlear implant (CI) surgery. Its performance, and thus success, is measured in accuracy, workload, usability and trust. While state-of-the-art (STOTA) research lacks the inclusion of...

GlobalMatch: Registration of forest terrestrial point clouds by global matching of relative stem positions

Registering point clouds of forest environments is an essential prerequisite for LiDAR applications in precision forestry. State-of-the-art methods for forest point cloud registration require the extraction of individual tree attributes, and they have an efficiency bottleneck when dealing with point clouds of real-world forests with dense...

The effect of indefeasibility and error correction on the registration process

Conventional wisdom indicates that there are two forms of register: a Register of Title and a Register of Deeds. However, we agree with Zevenbergen & Ploeger (2019, p. 7) when they state that in reality most systems are neither purely deeds or Title based and lie on a spectrum between the two poles. As binary concepts, the terms Title and Deed...

Evolving registration - how do established Registrars embrace change

A Land Register should evolve to meet the changing social and policy needs of citizens, government and business. Evolution is about constant change. When there is a significant mismatch between the register and need then reform is required. Reform affects more than just legislation; reform disrupts policy, practice, networks and people....

A hybrid registration method using the mandibular bone surface for electromagnetic navigation in mandibular surgery

Purpose: To utilize navigated mandibular (reconstructive) surgery, accurate registration of the preoperative CT scan with the actual patient in the operating room (OR) is required. In this phantom study, the feasibility of a noninvasive hybrid registration method is assessed. This method consists of a point registration with anatomic...

Longitudinal diffusion MRI analysis using Segis-Net: A single-step deep-learning framework for simultaneous segmentation and registration

This work presents a single-step deep-learning framework for longitudinal image analysis, coined Segis-Net. To optimally exploit information available in longitudinal data, this method concurrently learns a multi-class segmentation and nonlinear registration. Segmentation and registration are modeled using a convolutional neural network and...

Precision of determining bone pose and marker position in the foot and lower leg from computed tomography scans: How low can we go in radiation dose?

Computed tomography (CT) imaging can be used to determine bone pose, sometimes combined with skin-mounted markers. For this specific application, a lower radiation dose than the conventional clinical dose might suffice. This study aims to determine how lowering the radiation dose of a CT-scan of the ankle and foot affects the precision of...

A unified Maximum Likelihood framework for simultaneous motion and T1 estimation in quantitative MR T1 mapping

In quantitative MR T1 mapping, the spin-lattice relaxation time T1 of tissues is estimated from a series of T1-weighted images. As the T1 estimation is a voxel-wise estimation procedure, correct spatial alignment of the T1-weighted images is crucial. Conventionally, the T1-weighted images are first registered based on a general-purpose...

Improved registration of DCE-MR images of the liver using a prior segmentation of the region of interest

In Dynamic Contrast-Enhanced MRI (DCE-MRI) of the liver, a series of images is acquired over a period of 20 minutes. Due to the patient's breathing, the liver is subject to a substantial displacement between acquisitions. Furthermore, due to its location in the abdomen, the liver also undergoes marked deformation. The large deformations...

Coarse point cloud registration by EGI matching of voxel clusters

Laser scanning samples the surface geometry of objects efficiently and records versatile information as point clouds. However, often more scans are required to fully cover a scene. Therefore, a registration step is required that transforms the different scans into a common coordinate system. The registration of point clouds is usually conducted...

Fusion of CTA and XA data using 3D centerline registration to aid coronary intervention

Coronary Artery Disease (CAD) is one of the most commonly occurring heart diseases worldwide. It results from the buildup of plaque below the intima layer inside the vessel wall of the coronary arteries. This obstruction in the vessel walls hinders the blood flow to the heart muscle.The most commonly used treatment techniques for CAD is...

Accuracy assessment of building point clouds automatically generated from iphone images

Low-cost sensor generated 3D models can be useful for quick 3D urban model updating, yet the quality of the models is questionable. In this article, we evaluate the reliability of an automatic point cloud generation method using multi-view iPhone images or an iPhone video file as an input. We register such automatically generated point cloud...

3D Face Recognition - Data Processing: Registration and Deformation

A 3D face recognition algorithm has been developed for the Microsoft Kinect in the scope of the final bachelor project at the TU Delft in 2013. The aim of the project is to develop a prototype face recognition system. The prototype system had to outperform the existing 2D face recognition system. The project is divided into three subgroups each...

A Review of 3D Cadastre Pilot Project and the Policy of 3D NSDI in the Republic of Korea

Recently, due to rapid urbanization, industrialization and population growth, the structures of cities are changing rapidly; multi-purpose three dimensional facilities above and below surface have been increased. Despite the three dimensional space registration such as building and basement facilities is necessary, it is impossible to represent...