- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
A touchless interaction interface for observing medical imaging
摘要： Using volume rendering to generate 3D models is associated with the problem of missing features on areas of interest, which are possibly concealed by other information. This article presents a novel focus-and-context medical imaging observation system using gesture-based technique to build a touchless interactive environment. The system offers two types of medical imaging observation tool, namely, 3D section cutting tool and 3-axes cross-section synchronization tool, enabling users to quickly and easily observe tissue sections. Feature classification was achieved using region growing and size-based transfer approaches. Combined with view penetration function (cylinder and cone view penetration functions), the system allows for direct observation of hidden features. The analytical experimental results verified that the proposed system is easy to operate in a touchless environment and creates positive user experience regarding observation and interaction.
关键词： Focus and context,Touchless,Medical imaging,Volume rendering,Visualization
更新于2025-09-23 15:23:52
-
A radiative transfer framework for non-exponential media
摘要： We develop a new theory of volumetric light transport for media with non-exponential free-flight distributions. Recent insights from atmospheric sciences and neutron transport demonstrate that such distributions arise in the presence of correlated scatterers, which are naturally produced by processes such as cloud condensation and fractal-pattern formation. Our theory formulates a non-exponential path integral as the result of averaging stochastic classical media, and we introduce practical models to solve the resulting averaging problem efficiently. Our theory results in a generalized path integral which allows us to handle non-exponential media using the full range of Monte Carlo rendering algorithms while enriching the range of achievable appearance. We propose parametric models for controlling the statistical correlations by leveraging work on stochastic processes, and we develop a method to combine such unresolved correlations (and the resulting non-exponential free-flight behavior) with explicitly modeled macroscopic heterogeneity. This provides a powerful authoring approach where artists can freely design the shape of the attenuation profile separately from the macroscopic heterogeneous density, while our theory provides a physically consistent interpretation in terms of a path space integral. We address important considerations for graphics including reciprocity and bidirectional rendering algorithms, all in the presence of surfaces and correlated media.
关键词： non-exponential transport,global illumination,participating media,volume rendering,radiative transfer
更新于2025-09-23 15:23:52
-
[ACM Press SIGGRAPH ASIA 2016 Symposium on Visualization - Macau (2016.12.05-2016.12.08)] SIGGRAPH ASIA 2016 Symposium on Visualization on - SA '16 - Evaluating the perception of semi-transparent structures in direct volume rendering techniques
摘要： Direct volume rendering (DVR) provides the possibility to visualize volumetric data sets as they occur in many scientific disciplines. A key benefit of DVR is that semi-transparency can be facilitated in order to convey the complexity of the visualized data. Unfortunately, semi-transparency introduces new challenges in spatial comprehension of the visualized data, as the ambiguities inherent to semi-transparent representations affect spatial comprehension. Accordingly, many visualization techniques have been introduced to enhance the spatial comprehension of DVR images. In this paper, we conduct a user evaluation in which we compare standard DVR with five visualization techniques which have been proposed to enhance the spatial comprehension of DVR images. In our study, we investigate the perceptual performance of these techniques and compare them against each other to find out which technique is most suitable for different types of data and purposes. In order to do this, a large-scale user study was conducted with 300 participants who completed a number of micro-tasks designed such that the aggregated feedback gives us insight on how well these techniques aid the end user to perceive depth and shape of objects. Within this paper we discuss the tested techniques, present the conducted study and analyze the retrieved results.
关键词： Volume rendering,transparency,depth perception
更新于2025-09-19 17:15:36
-
CUDA-based Volume Rendering and Inspection for Time-varying Ultrasonic Testing Datasets
摘要： We present a framework for time-varying 3D UT datasets based on volume real-time CUDA-based rendering with high quality. In addition, we design a novel trapezoid-shaped transfer functions (TF) with color gradient. Furthermore, we propose an interactive 3D inspection method via clipping plane with enhanced ability of the cross-section data.
关键词： Clipping Plane,Volume Rendering,Ultrasonic Testing,Transfer Function,CUDA,Time-varying Datasets
更新于2025-09-10 09:29:36
-
[ACM Press the 7th International Conference - Cairo, Egypt (2018.05.02-2018.05.04)] Proceedings of the 7th International Conference on Software and Information Engineering - ICSIE '18 - An Interactive Mixed Reality Imaging System for Minimally Invasive Surgeries
摘要： In orthopedic surgery, it is important for physicians to completely understand the three-dimensional (3D) anatomical structures for several procedures. With the current revolution in technology in every aspect of our life, mixed reality in the medical field is going to be very useful. However, medicine has a visualization problem hindering how surgeons operate. The surgeons are required to imagine the actual 3D structure of the patient by looking at multiple 2D slices of the patients’ body. This process is time consuming, exhausting and requires special skill and experience. Moreover, patients and surgeons are exposed to extra x-ray doses. Therefore, it is important to provide the surgeon with a better way to diagnose the patient; a way that is more accurate and locates where the problem is in a faster and more efficient manner. Medical imaging systems usually provide 3D images that can guide interventional clinical procedures. However, it is difficult to map the 3D anatomical structure with real objects. This project investigates and solves this problem by providing a mixed reality technology solution that merges the 3D image with real objects to facilitate the work progress of the surgeon. The proposed solution is an interactive mixed reality (MR) system for minimally invasive surgeries. The system is based on mapping the patient volume scan using computed tomography (CT) or Magnetic Resonance Imaging (MRI) to a 3D model of the patient’s body. The rendered model can be used in MR system to view 3D human structures through a set of wearable glasses.
关键词： mixed reality,volume rendering,medical imaging
更新于2025-09-04 15:30:14