Showing papers on "Imaging technology published in 2023"
TL;DR: In this article , the ability of various retinal imaging technologies such as optical coherence tomography (OCT), color fundus retinal photography, fluorescein angiography, and fundus photography to diagnose age-related macular degeneration (AMD) is assessed.
Abstract: Age-related macular degeneration (AMD) is a disease that worsens the central vision of numerous individuals across the globe. Ensuring that patients are diagnosed accurately and that their symptoms are carefully monitored is essential to ensure that adequate care is delivered. To accomplish this objective, retinal imaging technology is necessary to assess the pathophysiology that is required to give an accurate diagnosis of AMD. The purpose of this review is to assess the ability of various retinal imaging technologies such as optical coherence tomography (OCT), color fundus retinal photography, fluorescein angiography, and fundus photography. The statistical methods that were conducted yielded results that suggested that using OCT in conjunction with other imaging technologies results in a higher detection of symptoms among patients that have AMD. Further investigation should be conducted to ascertain the validity of the conclusions that were stated within the review.
TL;DR: In this article , He and Pompeo presented an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which allows the use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owners are credited and that the original publication in this journal is cited.
Abstract: COPYRIGHT © 2023 He and Pompeo. This is an openaccess article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
TL;DR: In this paper , the principle of hyperspectral imaging technology is introduced, and according to research on HSI technology in the nondestructive rapid detection of tea in the past 5 years, the application of HSI in detecting of tea biochemical components, accurate classification, determination of mildew degree, and stress monitoring and the application progress in planting production management are analyzed.
Abstract: Hyperspectral imaging technology combines two‐dimensional imaging and spectral technology, which can simultaneously obtain spatial and spectral information of the object to be measured and is an advanced technical method. With the development of science and technology, the detection of tea has also been continuously improved, and it has developed in the direction of being nondestructive, fast, real‐time, and accurate. In this paper, the principle of hyperspectral imaging technology is introduced, and according to research on hyperspectral imaging technology in the nondestructive rapid detection of tea in the past 5 years, the application of hyperspectral imaging technology in the detection of tea biochemical components, accurate classification, determination of mildew degree, and stress monitoring and the application progress in planting production management are analyzed. Additionally, the main challenges existing in the current research are analyzed, and future application prospects are proposed to provide a reference for the application and promotion of hyperspectral imaging technology in the actual production of tea.
20 Mar 2023
TL;DR: In this paper , a new laser 3D imaging technology is proposed, which is called pulse laser three-dimensional imaging technology based on pulse slice, which not only has the technical advantages of distance gated laser threeD imaging, but also can use CCD (or CMOS) optical sensor with large-scale pixel array, and can improve the longitudinal distance resolution by more than one order of magnitude.
Abstract: The laser three-dimensional imaging system can capture the three-dimensional image information of the target. Compared with the traditional two-dimensional image, the three-dimensional image provides more data dimensions and contains more comprehensive target information, which greatly improves the recognition ability of imaging weapons. Laser 3D imaging is mainly divided into scanning and non-scanning. Compared with scanning imaging, non-scanning 3D imaging has the characteristics of compact structure, fast imaging speed, high range resolution and large field of view. The existing non scanning laser 3D imaging systems mainly include streak tube laser 3D imaging system, APD area array laser 3D imaging system and range gated laser 3D imaging system. Among them, range gated 3D imaging technology has become the main research direction of long-distance laser 3D imaging system because of its advantages of clear imaging, high signal-to-noise ratio and free from the influence of atmospheric backscattering. In this paper, a new laser three-dimensional imaging technology is proposed, which is called pulse laser three-dimensional imaging technology based on pulse slice. This technology not only has the technical advantages of distance gated laser three-dimensional imaging, but also can use CCD (or CMOS) optical sensor with large-scale pixel array, At the same time, it overcomes the limitation of pulse width on longitudinal distance resolution in range gated laser 3D imaging and can improve the longitudinal distance resolution by more than one order of magnitude. This paper describes the basic principle, exposure process analysis and imaging processing method of pulse slicing laser 3D imaging technology.
06 Apr 2023
TL;DR: In this article , the authors proposed a shutterless non-uniformity correction (SLNUC) algorithm based on ambient temperature, which can adapt to the working requirements of a wide temperature range, without affecting the output of video stream.
Abstract: Infrared imaging technology is widely used in national defense, industry, medical and other fields. High performance infrared imaging technology is highly valued by all countries in the world. However, the inhomogeneity, the inherent characteristic of infrared image, will seriously affect the real information of the image and seriously restrict the performance of infrared imaging system. In this paper, we proposed a shutter-less non-uniformity correction (SLNUC) algorithm based on ambient temperature. The SLNUC is based on the non-uniformity correction of the collected image of HgCdTE mid-wave infrared detector. The experimental results show that the SLNUC correction algorithm can adapt to the working requirements of a wide temperature range, without affecting the output of video stream, and the non-uniformity reaches 0.17% after correction, which lays a foundation for the development of new equipment.
TL;DR: Polarization 3D imaging technology has received extensive attention in recent years because of its advantages of high accuracy, long detection distance, simplicity, and low cost as discussed by the authors , however, the ambiguity in the normal obtained by the polarization characteristics of the target's specular or diffuse reflected light limits the development of polarization 3D image technology.
Abstract: Polarization three-dimensional (3D) imaging technology has received extensive attention in recent years because of its advantages of high accuracy, long detection distance, simplicity, and low cost. The ambiguity in the normal obtained by the polarization characteristics of the target’s specular or diffuse reflected light limits the development of polarization 3D imaging technology. Over the past few decades, many shape from polarization techniques have been proposed to address the ambiguity issues, i.e., high-precision normal acquisition. Meanwhile, some polarization 3D imaging techniques attempt to extend experimental objects to complex specific targets and scenarios through a learning-based approach. Additionally, other problems and related solutions in polarization 3D imaging technology are also investigated. In this paper, the fundamental principles behind these technologies will be elucidated, experimental results will be presented to demonstrate the capabilities and limitations of these popular technologies, and finally, our perspectives on the remaining challenges of the polarization 3D imaging technology will be presented.
TL;DR: Microwave-induced thermoacoustic imaging (MTAI) as mentioned in this paper is an emerging physical imaging technology that combines the high resolution of ultrasound imaging with the high contrast of microwave imaging and the advantages of deep penetration of microwave.
Abstract: Microwave-induced thermoacoustic imaging (MTAI) is an emerging physical imaging technology that combines the high resolution of ultrasound imaging with the high contrast of microwave imaging and the advantages of deep penetration of microwave. MTAI uses microwave as the excitation source and ultrasound as the information carrier, through the transformation of microwave to ultrasound energy transfer form to achieve non-destructive, high-resolution imaging of biological tissue at a depth of centimeters. The contrast of the MTAI image is determined by the difference in microwave absorption. In biological tissues, polar molecules such as water molecules (molecular polarization loss) and ions (ion polarization loss) are mainly used as signal sources to obtain structural and functional images of biological tissues. After more than 20 years of development, MTAI has been applied to imaging various biological tissues and detecting multiple diseases, such as brain imaging, breast imaging, joint imaging, prostate cancer detection, cerebral hemorrhage detection, etc This paper provides a comprehensive review on: (1) the principle of MTAI, (2) application in the biomedical field, and (3) future development direction.
TL;DR: In this paper , a review of the roles of PET and MRI in the diagnosis and monitoring of Alzheimer's disease, respectively, and analyzes their advantages and disadvantages is presented. And the review also discusses the problems and challenges still faced by this hybrid imaging technology.
Abstract: Alzheimer’s disease (AD), a neurodegenerative disease that afflicts many people as the most common form of dementia, still lacks effective symptomatic treatments. PET-MRI hybrid imaging technology combines Positron emission tomography (PET) and Magnetic resonance imaging (MRI), which is believed to be helpful for the early screening, diagnosis, disease course monitoring and treatment evaluation of AD, and has a very promising technical prospect. This review reviews the roles of PET and MRI in the diagnosis and monitoring of AD, respectively, and analyzes their advantages and disadvantages. Later, based on previous studies, this review discusses the effects of the two technologies when they are used together, and compares them with each other and PET-Computed Tomography (CT) hybrid imaging technology respectively, indicating that PET and MRI can complement each other and give full play to their respective advantages. After this, the review also discusses the problems and challenges still faced by this hybrid imaging technology. This paper presents the current research status and future research direction of PET-MRI for AD diagnosis and monitoring, which is of great value to its research and application
01 Feb 2023
TL;DR: In this paper , the authors discuss several factors (binning, spatial frequency sampling, and distance to the target area) indispensable to getting quantifiable and reproducible results, which are the essence of physiological imaging.
Abstract: With the proliferation of inexpensive CMOS cameras, medical imaging experiences a noticeable influx of new technologies. While anatomical imaging is based on well-established principles of photography, physiological optical imaging is a relatively novel range of technologies that requires considering a new set of technical and physiological aspects. We discuss several factors (binning, spatial frequency sampling, and distance to the target area) indispensable to getting quantifiable and reproducible results, which are the essence of physiological imaging. We also discussed their implications for several commonly used physiological imaging modalities, including hyperspectral/multispectral imaging, fluorescence imaging, and thermography. Physiological imaging technologies are in their infancy. Thus, the proper design, which considers technical and physiological aspects, is paramount to establishing their credibility and driving clinical adoption.
14 May 2023
TL;DR: Emerging Trends in MRI and CT Scan: Innovations in Imaging technology for Accurate Diagnosis as discussed by the authors is an excellent overview of the latest advances in imaging technology for accurate diagnosis.
Abstract: Emerging Trends in MRI and CT Scan: Innovations in ImagingTechnology for Accurate Diagnosis