A Mobile Imaging System for Medical Diagnostics

2013 ◽  
pp. 215-226 ◽  
Author(s):  
Sami Varjo ◽  
Jari Hannuksela
Keyword(s):  
Imaging System ◽  
Medical Diagnostics ◽  
Mobile Imaging

scholarly journals Gamma Radiation Imaging System via Variable and Time-Multiplexed Pinhole Arrays

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3013 ◽  
Author(s):  
Ariel Schwarz ◽  
Amir Shemer ◽  
Yossef Danan ◽  
Rachel Bar-Shalom ◽  
Hemy Avraham ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Imaging System ◽  
Single Photon ◽  
Photon Emission ◽  
Three Dimensional ◽  
Medical Diagnostics ◽  
Emission Computed Tomography ◽  
Planar Imaging ◽  
Gamma Imaging ◽  
Image Capturing

Biomedical planar imaging using gamma radiation is a very important screening tool for medical diagnostics. Since lens imaging is not available in gamma imaging, the current methods use lead collimator or pinhole techniques to perform imaging. However, due to ineffective utilization of the gamma radiation emitted from the patient’s body and the radioactive dose limit in patients, poor image signal to noise ratio (SNR) and long image capturing time are evident. Furthermore, the resolution is related to the pinhole diameter, thus there is a tradeoff between SNR and resolution. Our objectives are to reduce the radioactive dose given to the patient and to preserve or improve SNR, resolution and capturing time while incorporating three-dimensional capabilities in existing gamma imaging systems. The proposed imaging system is based on super-resolved time-multiplexing methods using both variable and moving pinhole arrays. Simulations were performed both in MATLAB and GEANT4, and gamma single photon emission computed tomography (SPECT) experiments were conducted to support theory and simulations. The proposed method is able to reduce the radioactive dose and image capturing time and to improve SNR and resolution. The results and method enhance the gamma imaging capabilities that exist in current systems, while providing three-dimensional data on the object.

scholarly journals THE FIRST-IN-RUSSIA SUPERCONDUCTING MAGNET RESONANCE 1.5 TESLA IMAGING SYSTEM FOR HIGH-PRECISION MEDICAL DIAGNOSTICS

2017 ◽  
Vol 27 (1) ◽  
pp. 19-23
Author(s):  
E. I. Demikhov ◽  
◽  
V. V. Lysenko ◽  
E. A. Kostrov ◽  
T. E. Demikhov ◽  
...  
Keyword(s):  
High Precision ◽  
Imaging System ◽  
Superconducting Magnet ◽  
Medical Diagnostics ◽  
Magnet Resonance

The Implement of B-Ultrasonic Image Acquisition Based on Camera Interface

2014 ◽  
Vol 513-517 ◽  
pp. 3801-3804
Author(s):  
Xiao Ming Gao
Keyword(s):  
Data Acquisition ◽  
Data Storage ◽  
Imaging System ◽  
Image Data ◽  
Medical Diagnostics ◽  
Ultrasonic Image ◽  
Ultrasonic Fields ◽  
Non Invasive ◽  
Software Development System ◽  
System Data

B-ultrasonic is widely used in medical diagnostics and other fields, because of its non-invasive, no radiation, etc. Early B-ultrasonic with analog imaging system cant achieve B-ultrasonic image processing, data storage and other operations. With the development of computer technology and electronic technology, Digital B-ultrasonic systems are increasingly used in actual diagnosis, the paper through the use of digital imaging system to achieve B-ultrasonic front ultrasound imaging, reuse embedded microcontrollers Camera interface for B-ultrasonic acquisition of image data, and on this platform to achieve a B-ultrasonic application software development. System testing show that the system data acquisition is stability, and easy to operate, reliable, also can be widely used in medical and industrial ultrasonic fields. Key words: B-ultrasonic; Data Acquisition; Camera; Digitizing

A Real-Time Flat-Panel X-Ray Pixel Imaging System for Low-Dose Medical Diagnostics and Craniofacial Applications

2000 ◽  
Vol 11 (1) ◽  
pp. 10-16
Author(s):  
Sylvie Chapuy ◽  
Denis Dimcovski ◽  
Zlatko Dimcovski ◽  
Eugène Grigoriev ◽  
Eugène Grob ◽  
...  
Keyword(s):  
Real Time ◽  
Low Dose ◽  
Imaging System ◽  
Medical Diagnostics ◽  
Flat Panel ◽  
X Ray

Spatially adaptive antialiasing for enhancement of mobile imaging system using combined wavelet-fourier transform

2013 ◽  
Vol 59 (4) ◽  
pp. 862-868 ◽  
Author(s):  
Eunjung Chae ◽  
Eunsung Lee ◽  
Wonseok Kang ◽  
Hejin Cheong ◽  
Joonki Paik
Keyword(s):  
Fourier Transform ◽  
Imaging System ◽  
Spatially Adaptive ◽  
Mobile Imaging

scholarly journals Simulation of Fresnel Zone Plate Imaging Performance with Number of Zones

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6649
Author(s):  
Ying Li ◽  
Ombeline de La Rochefoucauld ◽  
Philippe Zeitoun
Keyword(s):  
Imaging System ◽  
Fresnel Zone ◽  
Visible Spectrum ◽  
Simulation Method ◽  
Medical Diagnostics ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Integral Imaging ◽  
Lens Array ◽  
Imaging Performance

In recent years, integral imaging, a promising three-dimensional imaging technology, has attracted more and more attention for its broad applications in robotics, computational vision, and medical diagnostics. In the visible spectrum, an integral imaging system can be easily implemented by inserting a micro-lens array between a image formation optic and a pixelated detector. By using a micro-Fresnel Zone Plate (FZP) array instead of the refractive lens array, the integral imaging system can be applied in X-ray. Due to micro-scale dimensions of FZP in the array and current manufacturing techniques, the number of zones of FZP is limited. This may have an important impact on the FZP imaging performance. The paper introduces a simulation method based on the scalar diffraction theory. With the aid of this method, the effect of the number of zones on the FZP imaging performance is numerically investigated, especially the case of very small number of zones. Results of several simulation of FZP imaging are presented and show the image can be formed by a FZP with a number of zones as low as 5. The paper aims at offering a numerical approach in order to facilitate the design of FZP for integral imaging.

New Aspects in the Design of Electron Optical Magnification Systems

1972 ◽  
Vol 30 ◽  
pp. 606-607
Author(s):  
Willem H.J. Andersen
Keyword(s):  
Electron Microscope ◽  
Imaging System ◽  
Chromatic Aberration ◽  
Research Tool ◽  
Energy Losses ◽  
Objective Lens ◽  
Theoretical Limit ◽  
Optical Magnification ◽  
Chromatic Aberrations ◽  
High Degree

Electron microscope design, and particularly the design of the imaging system, has reached a high degree of perfection. Present objective lenses perform up to their theoretical limit, while the whole imaging system, consisting of three or four lenses, provides very wide ranges of magnification and diffraction camera length with virtually no distortion of the image. Evolution of the electron microscope in to a routine research tool in which objects of steadily increasing thickness are investigated, has made it necessary for the designer to pay special attention to the chromatic aberrations of the magnification system (as distinct from the chromatic aberration of the objective lens). These chromatic aberrations cause edge un-sharpness of the image due to electrons which have suffered energy losses in the object.There exist two kinds of chromatic aberration of the magnification system; the chromatic change of magnification, characterized by the coefficient Cm, and the chromatic change of rotation given by Cp.

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