Fred Dech's research while affiliated with University of Chicago and other places

Publications (25)

Article
Many projects have focused on the improvement of virtual education. We have contributed with the global virtual anatomy course for teaching students in multiple locations with stereoscopic volume rendering, audio/video conferencing and additional materials. This year we focused on further simplifying the deployment of the classroom by using the new...
Article
Many prototype projects aspire to develop a sustainable model of immersive radiological volume visualization for virtual anatomic education. Some have focused on distributed or parallel architectures. However, very few, if any others, have combined multi-location, multi-directional, multi-stream sharing of video, audio, desktop applications, and pa...
Article
For more than a decade, various approaches have been taken to teach anatomy using immersive virtual reality. This is the first complete anatomy course we are aware of which directly substitutes immersive virtual reality via stereo volume visualization of clinical radiological datasets for cadaver dissection. The students valued highly the new appro...
Article
Full-text available
UNDERSTANDING SPATIAL RELATIONSHIPS among anatomic structures is an essential skill for physicians. Traditional medical education—using books, lectures, physical models, and cadavers—may be insufficient for teaching complex anatomical relationships. This study was designed to measure whether teaching complex anatomy to medical students using immers...
Article
Integrating anatomic nomenclature with geometric anatomic data via a web interface and providing illustration and visualization tools presents numerous challenges. We have developed a library of anatomic models and methods for navigating anatomic nomenclature. Based on the library and tools, we have developed a simple, yet powerful, open web-based...
Article
Creating a library of binary segmentation mask sequences for the abdominal anatomy hierarchy of SNOMED and developing a quick, flexible automatic method for generating iso-surface models from these named structure masks has been a primary goal in our research. This paper describes our development of a clear path for computing visualizations of arbi...
Article
Leveraging the advances of today's commodity graphics hardware, adoption of community proven collaboration technology, and the use of standard Web and Grid technologies a flexible system is designed to enable the construction of a distributed collaborative radiological visualization application. The system builds from a prototype application as wel...
Article
This paper describes early technical success toward enabling high quality distributed shared volumetric visualization of radiological data in concert with multipoint video collaboration using Grid infrastructures. Key principles are the use of commodity off-the-shelf hardware for client machines and open source software to permit deployment of over...
Article
We describe a virtual-reality widget library and two medical applications built on the widget library. These two applications, education using surface models and radiological volume visualization, make use of collaborative interaction techniques. These techniques support a high degree of precision with respect to manipulation of data and data param...
Article
Radiological volumes are typically reviewed by surgeons using cross-sections and iso-surface reconstructions. Applications that combine collaborative stereo volume visualization with symbolic anatomic information and data fusions would expand surgeons' capabilities in interpretation of data and in planning treatment. Such an application has not bee...
Article
A clear understanding of the intricate spatial relationships among the structures of the pelvic floor, rectum, and anal canal is essential for the treatment of numerous pathologic conditions. Virtual-reality technology allows improved visualization of three-dimensional structures over conventional media because it supports stereoscopic-vision, view...
Article
PURPOSE: A clear understanding of the intricate spatial relationships among the structures of the pelvic floor, rectum, and anal canal is essential for the treatment of numerous pathologic conditions. Virtual-reality technology allows improved visualization of three-dimensional structures over conventional media because it supports stereoscopic-vis...
Article
Understanding the spatial relationships among the liver segments, and intrahepatic portal and hepatic veins is essential for surgical treatment of liver diseases. Teleimmersive virtual reality enables improved visualization over conventional media because it supports stereo vision, viewer-centered perspective, large angles of view, and interactivit...
Article
Skill, effort, and time are required to identify and visualize anatomic structures in three-dimensions from radiological data. Fundamentally, automating these processes requires a technique that uses symbolic information not in the dynamic range of the voxel data. We were developing such a technique based on mutual information for automatic multi-m...
Conference Paper
We describe a virtual reality widget library and two medical applications. These applications, built on the widget library, make use of collaborative interaction techniques. These techniques support a high degree of precision with respect to manipulation of data and data parameters. The 3D widgets are synchronized between collaborating clients in o...
Article
By combining teleconferencing, tele-presence, and Virtual Reality, the Tele-Immersive environment enables master surgeons to teach residents in remote locations. The design and implementation of a Tele-Immersive medical educational environment, Teledu, is presented in this paper. Teledu defines a set of Tele-Immersive user interfaces for medical ed...
Article
Due to increases in network speed and bandwidth, distributed exploration of medical data in immersive Virtual Reality (VR) environments is becoming increasingly feasible. The volumetric display of radiological data in such environments presents a unique set of challenges. The shear size and complexity of the datasets involved not only make them dif...
Article
It requires skill, effort, and time to visualize desired anatomic structures from radiological data in three-dimensions. There have been many attempts at automating this process and making it less labor intensive. The technique we have developed is based on mutual information for automatic multi-modality image fusion (MIAMI Fuse, University of Mich...
Conference Paper
Virtual Reality (VR) is increasingly being used in medical training and education. In most of these applications, VR is used to improve the visual fidelity of the simulated objects. In this paper we investigate the potential of using VR to simulate visual deterioration caused by disease processes. The first person interactive nature of VR provides...
Article
Since the acquisition of high-resolution three-dimensional patient images has become widespread, medical volumetric datasets (CT or MR) larger than 100 MB and encompassing more than 250 slices are common. It is important to make this patient-specific data quickly available and usable to many specialists at different geographical sites. Web-based sy...
Conference Paper
Full-text available
This paper presents an overview of the tele-immersion applications that have been built by collaborators around the world using the CAVERNsoft toolkit, and the lessons learned from building these applications. In particular the lessons learned are presented as a set of rules-of-thumb for developing tele-immersive applications in general
Article
This paper describes the development of the Virtual Pelvic Floor, a new method of teaching the complex anatomy of the pelvic region utilizing virtual reality and advanced networking technology. Virtual reality technology allows improved visualization of three-dimensional structures over conventional media because it supports stereo vision, viewer-c...

Citations

... Inexpensive, high performance graphics processing units, particularly in parallel rendering architectures, allow for interactive manipulation and 24-bit full color representation of these data intensive volume visualizations [2]. In our experience teaching anatomy and in surgical treatment planning using these technologies, we find grayscale, despite its perceptual advantages, to be a severe distraction from the realism made possible by modern volume rendering, especially in stereoscopic visualization systems [3,4]. Some diagnostic radiological workstations even offer full color options for volume rendering CT data. ...
... Jayaram et al. [22] have developed a virtual reality based application to facilitate the planning , evaluation and verification of a mechanical assembly system. Ye et al. [23] presented an experiment which examines the potential benefits of using VR environments to support assembly planning . To this end, the assembly-planning performance of subjects in traditional and VR environments are compared. ...
... Further innovations in camera technology enabled new 2D and 3D techniques for visualizing shape and color in living organisms (e.g., Baqersad et al., 2017;Chiari et al., 2008). Today, we boast a wide range of visualization techniques for organisms of varying sizes, from the smallest bacteria to massive whales (e.g., Bot and Irschick, 2019;Gignac and Kley, 2014;Gignac et al., 2016;Kim and Kim, 1999;Laha et al., 2014;Silverstein et al., 2006;Szaflik, 2007). The urgency of visualizing the shape of life is felt perhaps more deeply today than ever before because of the extinction crisis for biodiversity during the Anthropocene (Turvey and Crees 2019). ...
... In follow-up work and to improve the design of haptic-based learning tools, Granados et al [5] conducted a study to better understand palpation techniques of experts while conducting DRE on a real subject. Dobson et al [6] proposed a system using virtual reality technology to visualize the anatomy in the pelvic area [6]. For their system, the user had to wear special glasses to view the model in 3D which was displayed on the 67-inch×50-inch screen (VR ImmersaDesk). ...
... Ai et al. [2] created a VR-based visual impaired simulation system for glaucoma, diplopia, and aging-related macular degeneration. Their system provides computational graphic stereo vision and head movement tracking. ...
... The use of immersive virtual reality for medical image display has a long history of research. Applications and concepts range from collaborative virtual environments for volume exploration (Silverstein and Dech (2005)), added haptic feedback generated from the volumetric information (Faludi et al. (2019)) to volumetric guidance through live 4D imaging of OCT for ophthalmic procedures (Draelos et al. (2018)). The use of VR has gained special popularity for volumetric 3D/4D cardiac ultrasound volumes (Hitschrich et al. (2019);van Beurden et al. (2012)). ...
... We have already outlined the feasibility of such an approach for medical education using CoWebViz, our collaborative, web-based, stereoscopic, visualization system. 4 This paper will describe the optimization of quality and interactivity of CoWebViz under varying network conditions enabling highly accessible interactive 3D stereoscopic visualization. This improved implementation is used for anatomy education at the Pritzker School of Medicine at the University of Chicago. ...
... Ayrıca, katılımcının oryantasyonunu da önemli ölçüde artırmaktadır. 60 Kadın pelvik anatomisini öğretme seçeneklerinin etkinliğini karşılaştıran bir çalışmada ise kitap ve bilgisayar destekli anatomi kaynaklarını içeren geleneksel öğretme metodu ile SG ile kadın pelvik anatomisini öğreten metot karşılaştırılmıştır. Katılımcıların pelvik taban bilgi düzeylerini değerlendiren anket, öğretme yöntemlerinin öncesinde ve sonrasında uygulanmış olup, yöntemler arasında anlamlı bir fark bulunmamıştır. ...
... It is mandatory in the era of big data (and complex analysis), and will also be used in simulation [9]. Through virtual reality, the multidisciplinary staff gain access to 3D navigation/simulations inside the CHD (with cheap stereoscopic glasses) [10]. Surgeons may imagine and test several procedures, and ''virtually'' repair the CHD on a computer-aided design software (Fig. 2), as we have done [11]. ...
... Validation studies have shown that the multimedia component of the lumbar puncture courseware aids in the acquisition of knowledge while the VR simulation further aids in the development and practise of technical skills [130]. At present the state of the art in virtual environments [181,168,35,31,20,114] and haptics has led to considerable work in surgical simulation and some work in interventional radiology. Some academic and commercial models simulate catheterisation [76,214,80,120,186] and needle puncture procedures [80,84,129]. ...