scholarly journals Enhanced Contactless Vital Sign Estimation from Real-Time Multimodal 3D Image Data

2020 ◽  
Vol 6 (11) ◽  
pp. 123
Author(s):  
Chen Zhang ◽  
Ingo Gebhart ◽  
Peter Kühmstedt ◽  
Maik Rosenberger ◽  
Gunther Notni
Keyword(s):  
Real Time ◽  
3D Imaging ◽  
Imaging System ◽  
Vital Signs ◽  
Image Data ◽  
Motion Artifacts ◽  
Video Data ◽  
Ambient Light ◽  
3D Image ◽  
Controlled Illumination

The contactless estimation of vital signs using conventional color cameras and ambient light can be affected by motion artifacts and changes in ambient light. On both these problems, a multimodal 3D imaging system with an irritation-free controlled illumination was developed in this work. In this system, real-time 3D imaging was combined with multispectral and thermal imaging. Based on 3D image data, an efficient method was developed for the compensation of head motions, and novel approaches based on the use of 3D regions of interest were proposed for the estimation of various vital signs from multispectral and thermal video data. The developed imaging system and algorithms were demonstrated with test subjects, delivering a proof-of-concept.

scholarly journals Three-Dimensional Microscopic Image Reconstruction Based on Structured Light Illumination

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6097
Author(s):  
Taichu Shi ◽  
Yang Qi ◽  
Cheng Zhu ◽  
Ying Tang ◽  
Ben Wu
Keyword(s):  
Real Time ◽  
Imaging System ◽  
Structured Light ◽  
Three Dimensional ◽  
Light Illumination ◽  
3D Image ◽  
Light Pattern ◽  
Structured Light Illumination ◽  
Working Distance ◽  
3D Information

In this paper, we propose and experimentally demonstrate a three-dimensional (3D) microscopic system that reconstructs a 3D image based on structured light illumination. The spatial pattern of the structured light changes according to the profile of the object, and by measuring the change, a 3D image of the object is reconstructed. The structured light is generated with a digital micro-mirror device (DMD), which controls the structured light pattern to change in a kHz rate and enables the system to record the 3D information in real time. The working distance of the imaging system is 9 cm at a resolution of 20 μm. The resolution, working distance, and real-time 3D imaging enable the system to be applied in bridge and road crack examinations, and structure fault detection of transportation infrastructures.

Subcutaneous Face and Neck Lift: A Traditional Method With Definite Effects Among Asians

2021 ◽  
Author(s):  
Guanhuier Wang ◽  
Runlei Zhao ◽  
Ran Bi ◽  
Hongbin Xie
Keyword(s):  
3D Imaging ◽  
Imaging System ◽  
Image Data ◽  
3D Measurement ◽  
Volume Changes ◽  
Middle Temporal ◽  
Neck Lift ◽  
Facial Information ◽  
Patient Reported ◽  
Face And Neck Lift

Abstract Background The mainstream face lifts in western countries always involve the SMAS treatment. Meanwhile, subcutaneous face and neck lift is wildly applied among Asians. Objectives To evaluate outcomes of subcutaneous face and neck lift, including patient-reported and 3D measurement outcomes, and report on details of surgical procedures. Methods Patients who received a subcutaneous face and neck lift from January 2017 to June 2019 were asked to complete FACE-Q scales, and facial information was collected by the Vectra 3D imaging system preoperatively and postoperatively. Volume changes in midface and possible displacement of facial landmarks were measured. The range of dissection and the amount of skin removed were recorded intraoperatively. Results In total, 119 patients (median age 46 years, interquartile range 40 - 53 years) received a subcutaneous face and neck lift. Among them, 88 patients completed pre- and postoperative FACE-Q scales. Patients’ satisfaction with facial subunits improved and wrinkles were significantly relieved (p＜0.001). Nineteen patients (38 midface sides) completed 3D image data collection. Postoperatively, zygomatic volume was increased, while nasolabial and lateral cheek volumes were decreased, with the volume change of 2.2 ± 1.3 mL. Mouth, nose, and eye displacements were negligible postoperatively. The widths of skin removed at the middle temporal, front of the sideburns, upper helix, earlobe, and retro-auricular were 13.8±1.9 mm, 19.6±3.1 mm, 27.6±3.9 mm, 16.4±3.9 mm, and 32.2±4.0 mm, respectively. Conclusions Our subcutaneous face and neck lift was effective in relieving nasolabial sagging, improving wrinkles, and achieving facial rejuvenation.

scholarly journals Three-dimensional phase-contrast X-ray microtomography with scanning–imaging X-ray microscope optics

2013 ◽  
Vol 20 (5) ◽  
pp. 793-800 ◽  
Author(s):  
Akihisa Takeuchi ◽  
Kentaro Uesugi ◽  
Yoshio Suzuki
Keyword(s):  
Phase Contrast ◽  
3D Imaging ◽  
Imaging System ◽  
Three Dimensional ◽  
Image Data ◽  
Pixel Detector ◽  
Scanning Microscope ◽  
X Ray ◽  
Scanning Imaging ◽  
Focused Beam

A three-dimensional (3D) X-ray tomographic micro-imaging system has been developed. The optical system is based on a scanning–imaging X-ray microscope (SIXM) optics, which is a hybrid system consisting of a scanning microscope optics with a one-dimensional (1D) focusing (line-focusing) device and an imaging microscope optics with a 1D objective. In the SIXM system, each 1D dataset of a two-dimensional (2D) image is recorded independently. An object is illuminated with a line-focused beam. Positional information of the region illuminated by the line-focused beam is recorded with the 1D imaging microscope optics as line-profile data. By scanning the object with the line focus, 2D image data are obtained. In the same manner as for a scanning microscope optics with a multi-pixel detector, imaging modes such as phase contrast and absorption contrast can be arbitrarily configured after the image data acquisition. By combining a tomographic scan method and the SIXM system, quantitative 3D imaging is performed. Results of a feasibility study of the SIXM for 3D imaging are shown.

Real-Time Boundary Detection of Fast Moving Object in Dark Surrounds

2013 ◽  
Vol 397-400 ◽  
pp. 2231-2234
Author(s):  
Peng Miao ◽  
Shi Han Feng ◽  
Qi Zhang ◽  
Yuan Yuan Ji
Keyword(s):  
Real Time ◽  
Fast Moving ◽  
Moving Boundary ◽  
Imaging System ◽  
Hardware Acceleration ◽  
Video Data ◽  
Moving Object ◽  
New Method ◽  
Real Time Identification ◽  
Temporal Standard Deviation

Dark surrounds make detection of moving target more difficult based on traditional methods. A real time identification of fast moving object under weak illumination is critical for some special applications. Traditional blob, contour and kernel-based tracking methods either need high computational loads or require normal illumination which limit their application. In this paper, we propose a new method trying to settle such difficulty based on temporal standard deviation. The performance of new method was evaluated with simulation data and real video data recorded by a simple imaging system. Combining hardware acceleration, a real time detection and visualization of fast moving boundary in dark environment can be achieved.

scholarly journals Voxx: a PC-based, near real-time volume rendering system for biological microscopy

2002 ◽  
Vol 282 (1) ◽  
pp. C213-C218 ◽  
Author(s):  
Jeffrey L. Clendenon ◽  
Carrie L. Phillips ◽  
Ruben M. Sandoval ◽  
Shiaofen Fang ◽  
Kenneth W. Dunn
Keyword(s):  
Real Time ◽  
Imaging System ◽  
Low Cost ◽  
Three Dimensional ◽  
Image Data ◽  
Complex Structures ◽  
Two Photon ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence ◽  
Biological Image

Confocal and two-photon fluorescence microscopy have advanced the exploration of complex, three-dimensional biological structures at submicron resolution. We have developed a voxel-based three-dimensional (3-D) imaging program (Voxx) capable of near real-time rendering that runs on inexpensive personal computers. This low-cost interactive 3-D imaging system provides a powerful tool for analyzing complex structures in cells and tissues and encourages a more thorough exploration of complex biological image data.

scholarly journals An open-source real-time ultrasound reconstruction system for four-dimensional imaging of moving organs

2009 ◽  
Author(s):  
Danielle Pace ◽  
David Gobbi ◽  
Chris Wedlake ◽  
Jan Gumprecht ◽  
Jonathan Boisvert ◽  
...  
Keyword(s):  
Open Source ◽  
Real Time ◽  
Spatial Resolution ◽  
Imaging System ◽  
Imaging Modality ◽  
Motion Artifacts ◽  
Computer Assisted ◽  
Source Imaging ◽  
3D Slicer ◽  
4D Ultrasound

Four-dimensional imaging is a necessary step in computer-assisted interventions (CAI) performed on moving surgical targets, such as those located within the beating heart or influenced by respiratory motion. Ultrasound (US) is often the best imaging modality for this application, as it provides good contrast and spatial resolution while remaining simple to integrate into the operating room. However, conventional 2D US imaging is often insufficient for preoperative planning and surgical guidance, real-time 3D ultrasound imaging using matrix array probes has a smaller field of view and lower spatial resolution, and 3D volumes created using 3D US reconstruction suffer from motion artifacts. As an alternative, gated 4D ultrasound reconstruction using a tracked 2D US probe is a promising technology. In this paper, we present SynchroGrab4D to the open-source community. SynchroGrab4D performs 3D and 4D US reconstruction in real-time while visualizing the output volume(s) within an OpenIGTLink-compliant CAI system, such as 3D Slicer. Also included are VTK classes that perform ECG-gating and that interface with several commercial tracking systems, as well as a 4D Imaging module in 3D Slicer. Our open-source imaging system can be used to collect the 4D image data required for computer-assisted surgical planning and intraoperative guidance for a variety of moving organs.

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