Imaging technology

About: Imaging technology is a research topic. Over the lifetime, 1450 publications have been published within this topic receiving 26186 citations.

Quantitative PET imaging with the 3T MR-BrainPET

Abstract: The new hybrid imaging technology of MR-PET allows for simultaneous acquisition of versatile MRI contrasts and the quantitative metabolic imaging with PET. In order to achieve the quantification of PET images with minimal residual error the application of several corrections is crucial. In this work we present our results on quantification with the 3T MR BrainPET scanner.

Advances in Terahertz Imaging

Abstract: Since the discovery of photography in the mid-1820s, imaging technology has moved far beyond the visible wavelength range. On one hand x-ray radiography is such an imaging technique which uses subatomic wavelengths, whereas on the other hand radars employ waves with wavelengths of several metres. However, it is seen that in last several years the field of terahertz imaging technology has become an area of interest, due to its various advantages. Actually discovery of new technologies in generation and detection of terahertz radiation have revolutionized this field. Promising applications for terahertz imaging, spectroscopy and sensing have generated much of this interest. By terahertz, generally the electromagnetic spectrum within frequency range of 0.1-10 THz is meant, which corresponds to 3000-30 μm. Terahertz waves are non-ionizing and non-invasive and hence have no risk for living organisms. Also they can provide images which are comparable to x-ray images. Though some of the techniques of THz imaging have been borrowed from well-established techniques like x-ray computed tomography, synthetic aperture radar etc., but several techniques have been exclusively developed for terahertz imaging. Compared to microwaves the THz radiation has much smaller wavelengths and thus provides higher image resolution. However, due to long wavelengths of THz radiation compared to visible wavelengths, far-field imaging using THz radiations has low resolution compared to optical systems. It is found that THz imaging has tremendous potential in applications like security screening, inspection of foods, inspection of semiconductors, pharmaceutical inspection, 2D and 3D imaging, including medical diagnosis to name a few.

Bionic vision imaging technology based on visible light and near-infrared rays

Abstract: The invention provides a bionic vision imaging technology based on visible light and near-infrared rays. The bionic vision imaging technology based on visible light and near-infrared rays comprises the following steps: taking a liquid varifocus lens and a prism as same-aperture double-waveband imaging systems of a zooming executing mechanism and a light splitting element according to a multi-spectrum imaging technical principle, enabling a near-infrared imaging channel of the systems not to be affected by light conditions of the outside by built-in near-infrared light sources, so that the whole systems can be used for observing a targeted object in the daytime and at night; rapidly adjusting the focal length of the imaging systems by using an automatic focusing algorithm according to continuous change of the position of the targeted object in a field of view of a bionic vision imaging system; and finally, verifying an actual imaging effect of a visible light and near-infrared bionic vision imaging system through experiments to obtain quantitative assessment indexes, wherein an automatic focusing process can be finished within 1,050 ms by the automatic focusing algorithm.

3um Pitch, 1um Active Diameter SPAD Arrays in 130nm CMOS Imaging Technology

Abstract: A shared well 4x4 SPAD array test structure with 3m pitch is realized in a 130nm CMOS image sensor technology. The SPADs have 150Hz median DCR at room temperature at 1V excess bias, 15% peak PDP and 176ps FWHM timing jitter both at 3V excess bias.