Yim-Pan Chui

Yim-Pan Chui
The Chinese University of Hong Kong | CUHK · Department of Computer Science and Engineering

PhD(CS&E), MIEEE, MACM

About

67
Publications
6,544
Reads
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850
Citations
Citations since 2016
2 Research Items
363 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Additional affiliations
January 2009 - June 2017
The Chinese University of Hong Kong
Position
  • Research Associate

Publications

Publications (67)
Conference Paper
Conventional anatomy education makes use of twodimensional (2D) images of three-dimensional (3D) anatomical objects to illustrate their spatial locations and interrelationships. Good visual-spatial ability is needed to mentally transform or fuse multiple images that are required to understand a concept. While animations and videos are developed for...
Article
Due to the characteristic artifacts of ultrasound images, e.g., speckle noise, shadows and intensity inhomogeneity, traditional intensity-based methods usually have limited success on the segmentation of fetal abdominal contour. This paper presents a novel approach to detect and measure the abdominal contour from fetal ultrasound images in two step...
Article
Mesh models can be extracted from medical imaging data. However some methods (e.g., CT) may suffer from severe artifacts (e.g., staircases, noises) in current clinical routine. As a consequence, haptic systems, when using these influenced mesh models, will become unstable. To tackle this problem, in this paper we propose an effective medical-orient...
Article
Detection of image features is an essential step in many medical applications. However, it is very challenging to accurately extract important features from ultrasound data that is corrupted by various imaging artifacts. Traditional intensity-based methods generally have poor performance in detecting salient features from ultrasound images. In cont...
Conference Paper
Drilling of bone, which is an essential part in temporal bone surgeries, is applied for making a tiny surgical entrance(incision) to the target. Because the temporal bone has a remarkable complex anatomy structures responsible for hearing and balance, VR (virtual reality)-based simulator is desirable for the trainee to interactively localize and op...
Article
Image segmentation is a fundamental but undoubtedly challenging problem in many applications due to various imaging artifacts, e.g., noise, intensity inhomogeneity and low signal-to-noise ratio. This paper presents a multiscale framework for ultrasound image segmentation based on speckle reducing anisotropic diffusion (SRAD) and geodesic active con...
Chapter
A novel multi-resolution framework for ultrasound image segmentation is presented. The framework is based on active contours and exploits both local intensity and local phase features to deal with degradations of ultrasound images such as low signal-to-noise, intensity inhomogeneity and speckle noise. We first build a Gaussian pyramid for each inpu...
Article
While a number of methods have been proposed to reconstruct geometrically and topologically accurate 3D vascular models from medical images, little attention has been paid to constantly maintain high mesh quality of these models during the reconstruction procedure, which is essential for many subsequent applications such as simulation-based surgica...
Article
We propose a novel multiresolution framework for ultrasound image segmentation in this paper. The framework exploits both local intensity and local phase information to tackle the degradations of ultrasound images. First, multiresolution scheme is adopted to build a Gaussian pyramid for each speckled image. Speckle noise is gradually smoothed out a...
Chapter
This paper presents an illumination invariant, histogram equalization invariant, rotation-robust and spatially stable texture descriptor for B-mode ultrasound images. We design a new edge-encoding descriptor that captures edge distributions of ultrasound textures. The distribution of edges categorized by their strength forms a signature of a specif...
Conference Paper
In this paper, we propose a particle-based rheologic modeling framework for simulating thrombus formation in medical simulation applications. The effect of blood rheology has been simulated through a smoothed particle hydrodynamics (SPH) formulation of non-Newtonian flow. By modeling vessel wall and embolizing coil as virtual particles, a pure Lagr...
Article
A VR-based simulator helps trainees develop skills for catheterization, a fundamental but difficult procedure in vascular interventional radiology. A deformable model simulates the complicated behavior of guide wires and catheters, using the principle of minimum total potential energy. A fast, stable multigrid solver ensures realistic simulation an...
Article
Ultrasound-guided needle placement is a key step in a lot of radiological intervention procedures such as biopsy, local anesthesia and fluid drainage. To help training future intervention radiologists, we develop a serious game to teach the skills involved. We introduce novel techniques for realistic simulation and integrate game elements for activ...
Article
Full-text available
Virtual reality-based simulators are very helpful for trainees to acquire the skills of manipulating catheters and guidewires during the vascular interventional surgeries. In the development of such a simulator, however, it is a great challenge to realistically model and simulate deformable catheters and guidewires in an interactive manner. We prop...
Article
This paper presents an intuitive sketching tool for human-computer interactively designing and modeling the vascular structure. Our system supports freehand outlining of the initial vascular structure through a 3D user interface, which is capable of modeling tubular vessel segments as well as bifurcations. The editing capability can be used for com...
Article
A VR-based training system for practicing biopsies simulates ultrasound imagery by stitching multiple ultrasound volumes on the basis of a 3D scale-invariant feature transform algorithm. In addition, a six-degree-of-freedom force model delivers a realistic haptic rendering of needle insertion.
Article
We introduce the design and implementation of an interactive system for the navigation of cross-sectional anatomy based on Chinese Visible Human (CVH) data, named CvhSlicer. This system is featured in real-time computation and rendering of high-resolution anatomical images on standard personal computers (PCs) equipped with commodity Graphics Proces...
Article
A meshless rheological model is proposed for medical simulation of vascular procedures. Due to the complexity of rheologic models involved in endovascular simulations, delivering a high level of interactivity with realistic biomechanical feedback is still a challenge. In this paper, we propose a particle-based rheologic modeling method for virtual...
Article
Realistic modeling of soft tissue deformation is crucial to virtual orthopedic surgery, especially orthopedic trauma surgery which involves layered heterogeneous soft tissues. In this paper, a novel modeling framework for multilayered soft tissue deformation is proposed in order to facilitate the development of orthopedic surgery simulators. We con...
Article
Orthopedic surgery treats the musculoskeletal system, in which bleeding is common and can be fatal. To help train future surgeons in this complex practice, researchers designed and implemented a serious game for learning orthopedic surgery. The game focuses on teaching trainees blood management skills, which are critical for safe operations. Using...
Article
Full-text available
Ultrasound-guided needle insertion is essential in many of minimally invasive surgeries or procedures, such as biopsy, drug delivery, spinal anaesthesia, etc. Accurate and safe needle insertion is a difficult task due to the high requirement of hand-eye coordination skills. Many proposed virtual reality (VR) based training systems put their emphasi...
Article
We present our experience in fast prototyping of a series of important but computation-intensive functionalities in surgical simulators based on newly released PhysX-enabled GPU. We focus on soft tissue deformation and bleeding simulation, as they are essential but have previously been difficult to be rapidly prototyped. A multilayered soft tissue...
Article
Registration of ultrasound volumes is a key issue for the reconstruction of volumetric ultrasound panorama. In this paper, we propose an improved three-dimensional (3D) scale invariant feature transform (SIFT) algorithm to globally register ultrasound volumes acquired from dedicated ultrasound probe, where local deformations are corrected by block-...
Article
Three-dimensional (3D) reconstruction of intrahepatic vessels is very useful in visualizing the complex anatomy of hepatic veins and intrahepatic portal vein. It also provides a 3D anatomic basis for diagnostic imaging and surgical operation on the liver. In the present study, we built a 3D digitized model of hepatic veins and intrahepatic portal v...
Article
The main focus of virtual medicine is to develop and deliver virtual reality based training and computer enhanced learning in medicine. Traditionally, medical students learn diagnostic, therapeutic and surgical skills through difficult clinical training on live patients. With the change in the health economics, the advances of minimal invasive surg...
Conference Paper
PURPOSE To simulate a 6-DOF force modeling of needle insertion in a virtual reality training system for percutaneous procedures. METHOD AND MATERIALS A computed tomography (CT) volume of a phantom (CIRS Model-057, mimicking human abdominal region) is first acquired on a GE LightSpeed 16-slice multi-detector scanner. Regions of dermis, hypodermis,...
Conference Paper
Full-text available
The reconstruction of three-dimensional (3D) ultrasound panorama from multiple ultrasound volumes can provide a wide field of view for better clinical diagnosis. Registration of ultrasound volumes has been a key issue for the success of this panoramic process. In this paper, we propose a method to register and stitch ultrasound volumes, which are s...
Article
Full-text available
The reconstruction of three-dimensional (3D) ultrasound panorama from multiple ultrasound volumes can provide a wide field of view for better clinical diagnosis. Registration of ultrasound volumes has been a key issue for the success of this panoramic process. In this paper, we propose a method to register and stitch ultrasound volumes, which are s...
Conference Paper
Full-text available
Ultrasound-guided biopsy is one of the most fundamental, but difficult, skills to acquire in interventional radiology. Intensive training, especially in the needle insertion, is required for trainee radiologists to perform safe procedures. In this paper, we propose a virtual reality simulation system to facilitate the training of radiologists and p...
Conference Paper
Full-text available
Visible Human Project (VHP) gains an increasingly concern all over the world since it was first initiated in the 90's due to the benefits it brings to medical research, education and training. With the precise visible human datasets, tailor-made applications can be developed for various purposes. In this paper, we propose a novel computing tool for...
Conference Paper
It is a challenging task to design and implement a high performance collaborative surgical simulation system because of the sharp conflict between the requirement of maintaining high levels of state consistency and the limitation of network transmission capacity. In this paper, a middleware based development platform, termed ECiSS, is presents for...
Conference Paper
Full-text available
Virtual reality technology has great potential benefit to practice of neurosurgery. Neurosurgery is a discipline of medicine and that specialty of surgery which provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and auto...
Conference Paper
Full-text available
This paper presents a novel orthopedics surgery training system with both the components for modeling as well as simulating the deformation and visualization in an efficient way. By employing techniques such as optimization, segmentation and center line extraction, the modeling of deformable model can be completed with minimal manual involvement. T...
Chapter
The advent of Visible Human Project (VHP) by the National Library of Medicine of United States in 1994 [1] has revolutionized the research in medical imaging. This was the first time true tissue color can be revealed for in depth study by all scientists and researchers worldwide. The visible human dataset has been applied to many different aspects...
Conference Paper
PURPOSE To simulate realistic visual and tactile feedback of percutaneous needle puncturing in a virtual-reality-based environment, which can train users in knowing well the puncturing position, force manipulation, angle of insertion, and depth of every needle puncture in order to avoid possible hazard in real-patient-based training. METHOD AND MA...
Article
Virtual reality based learning of human anatomy is feasible when a database of 3D organ models is available for the learner to explore, visualize, and dissect in virtual space interactively. In this article, we present our latest work on photorealistic virtual anatomy applications based on the Chinese Visible Human (CVH) data. We have focused on th...
Article
Full-text available
This paper presents an intelligent virtual environment for Chinese acupuncture learning and training using state-of-the-art virtual reality technology. It is the first step toward developing a comprehensive virtual human model for studying Chinese medicine. Students can learn and practice acupuncture in the proposed 3-D interactive virtual environm...
Article
In this paper, we present our application of latest information technology in assisting the Chinese acupuncture research. Having integrated the Chinese Visible Human (CVH) data, virtual reality, visualization and imaging techniques, we have constructed a 3-dimensional digital human model for acupuncture. This model integrates the meridian positioni...
Article
Surgical training systems using virtual reality simulation techniques offer a cost-effective alternative to traditional training methods. In this sense, techniques for interactive visualization and virtual reality surgery have been one of the very important research areas. We describe various techniques we have used in developing a virtual reality...
Article
This paper presents a haptic needle manipulation simulator for Chinese acupuncture learning and training. Students can learn and practise acupuncture in the proposed 3D interactive virtual environment that supports force feedback interface for needle insertion. So that, students not only "see" but also "touch" the virtual patient. With the high per...
Article
In this paper, we propose a new attitude dead-reckoning paradigm in a collaborative virtual environment (CVE). We derive a general polynomial construction scheme of attitude trajectory that uses a number of previous packets in order to extrapolate the future trajectory of objects by quaternion representation. The scheme allows consecutive attitudes...
Article
Full-text available
Surgical training systems based on virtual-reality (VR) simulation techniques offer a cost-effective and efficient alternative to traditional training methods. This paper describes a VR system for training arthroscopic knee surgery. Virtual models used in this system are constructed from the Visual Human Project dataset. Our system simulates soft t...
Article
Surgical training systems based on virtual reality (VR) and simulation techniques offer a cost-effective and efficient alternative to traditional training methods. This paper describes a virtual reality system for training arthroscopic knee surgery. The virtual model used in this system is constructed from the Visual Human Project dataset. The syst...
Conference Paper
This paper presents a haptic needle manipulation simulator for Chinese acupuncture learning and training. Students can learn and practise acupuncture in the proposed 3D interactive virtual environment that supports force feedback interface for needle insertion. So that, students not only "see" but also "touch" the virtual patient. With the high per...
Thesis
Thesis (M. Phil.)--Chinese University of Hong Kong, 2001. Includes bibliographical references (leaves 126-132).
Conference Paper
In this paper, we propose a new attitude dead reckoning paradigm in collaborative virtual environment (CVE). We derive a general polynomial construction scheme of attitude trajectory that uses a number of previous packets in order to extrapolate the future trajectory of objects by quaternion representation. The scheme allows consecutive attitudes r...
Conference Paper
Nowadays, medical diagnosis in critical diseases are seldom executed by only one person. Often, in difficult cases, two or more physicians are involved to reach a diagnosis. The growth of the World Wide Web and the modern trend of cooperative work in scientific research gave rise to a new class of systems, the so-called collaborative visualization...

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