Showing papers on "Imaging technology published in 2017"

A Review on Real-Time 3D Ultrasound Imaging Technology.

Abstract: Real-time three-dimensional (3D) ultrasound (US) has attracted much more attention in medical researches because it provides interactive feedback to help clinicians acquire high-quality images as well as timely spatial information of the scanned area and hence is necessary in intraoperative ultrasound examinations. Plenty of publications have been declared to complete the real-time or near real-time visualization of 3D ultrasound using volumetric probes or the routinely used two-dimensional (2D) probes. So far, a review on how to design an interactive system with appropriate processing algorithms remains missing, resulting in the lack of systematic understanding of the relevant technology. In this article, previous and the latest work on designing a real-time or near real-time 3D ultrasound imaging system are reviewed. Specifically, the data acquisition techniques, reconstruction algorithms, volume rendering methods, and clinical applications are presented. Moreover, the advantages and disadvantages of state-of-the-art approaches are discussed in detail.

Review of an initial experience with an experimental spectral photon-counting computed tomography system

Abstract: Spectral photon-counting CT (SPCCT) is an emerging X-ray imaging technology that extends the scope of available diagnostic imaging tools. The main advantage of photon-counting CT technology is better sampling of the spectral information from the transmitted spectrum in order to benefit from additional physical information being produced during matter interaction, including photo-electric and Compton effects, and the K-edge effect. The K-edge, which is specific for a given element, is the increase in X-ray absorption of the element above the binding energy between its inner electronic shell and the nucleus. Hence, the spectral information contributes to better characterization of tissues and materials of interest, explaining the excitement surrounding this area of X-ray imaging. Other improvements of SPCCT compared with conventional CT, such as higher spatial resolution, lower radiation exposure and lower noise are also expected to provide benefits for diagnostic imaging. In this review, we describe multi-energy CT imaging, from dual energy to photon counting technology, and our initial experience results using a clinical-scale spectral photon counting CT (SPCCT) prototype system in vitro and in vivo. In addition, possible clinical applications are introduced.

Real-time intravascular photoacoustic-ultrasound imaging of lipid-laden plaque in human coronary artery at 16 frames per second.

Abstract: Intravascular photoacoustic-ultrasound (IVPA-US) imaging is an emerging hybrid modality for the detection of lipid-laden plaques, as it provides simultaneous morphological and lipid-specific chemical information of an artery wall. Real-time imaging and display at video-rate speed are critical for clinical utility of the IVPA-US imaging technology. Here, we demonstrate a portable IVPA-US system capable of imaging at up to 25 frames per second in real-time display mode. This unprecedented imaging speed was achieved by concurrent innovations in excitation laser source, rotary joint assembly, 1 mm IVPA-US catheter size, differentiated A-line strategy, and real-time image processing and display algorithms. Spatial resolution, chemical specificity, and capability for imaging highly dynamic objects were evaluated by phantoms to characterize system performance. An imaging speed of 16 frames per second was determined to be adequate to suppress motion artifacts from cardiac pulsation for in vivo applications. The translational capability of this system for the detection of lipid-laden plaques was validated by ex vivo imaging of an atherosclerotic human coronary artery at 16 frames per second, which showed strong correlation to gold-standard histopathology. Thus, this high-speed IVPA-US imaging system presents significant advances in the translational intravascular and other endoscopic applications.

Real-time MRI guidance of cardiac interventions.

Abstract: Cardiac magnetic resonance imaging (MRI) is appealing to guide complex cardiac procedures because it is ionizing radiation-free and offers flexible soft-tissue contrast. Interventional cardiac MR promises to improve existing procedures and enable new ones for complex arrhythmias, as well as congenital and structural heart disease. Guiding invasive procedures demands faster image acquisition, reconstruction and analysis, as well as intuitive intraprocedural display of imaging data. Standard cardiac MR techniques such as 3D anatomical imaging, cardiac function and flow, parameter mapping, and late-gadolinium enhancement can be used to gather valuable clinical data at various procedural stages. Rapid intraprocedural image analysis can extract and highlight critical information about interventional targets and outcomes. In some cases, real-time interactive imaging is used to provide a continuous stream of images displayed to interventionalists for dynamic device navigation. Alternatively, devices are navigated relative to a roadmap of major cardiac structures generated through fast segmentation and registration. Interventional devices can be visualized and tracked throughout a procedure with specialized imaging methods. In a clinical setting, advanced imaging must be integrated with other clinical tools and patient data. In order to perform these complex procedures, interventional cardiac MR relies on customized equipment, such as interactive imaging environments, in-room image display, audio communication, hemodynamic monitoring and recording systems, and electroanatomical mapping and ablation systems. Operating in this sophisticated environment requires coordination and planning. This review provides an overview of the imaging technology used in MRI-guided cardiac interventions. Specifically, this review outlines clinical targets, standard image acquisition and analysis tools, and the integration of these tools into clinical workflow. Level of evidence 1 Technical Efficacy: Stage 5 J. Magn. Reson. Imaging 2017;46:935-950.

Real-time intravascular photoacoustic-ultrasound imaging of lipid-laden plaque in human coronary artery at 16 frames per second

Abstract: Intravascular photoacoustic-ultrasound (IVPA-US) imaging is an emerging hybrid modality for the detection of lipid-laden plaques, as it provides simultaneous morphological and lipid-specific chemical information of an artery wall. Real-time imaging and display at video-rate speed are critical for clinical utility of the IVPA-US imaging technology. Here, we demonstrate a portable IVPA-US system capable of imaging at up to 25 frames per second in real-time display mode. This unprecedented imaging speed was achieved by concurrent innovations in excitation laser source, rotary joint assembly, 1 mm IVPA-US catheter size, differentiated A-line strategy, and real-time image processing and display algorithms. Spatial resolution, chemical specificity, and capability for imaging highly dynamic objects were evaluated by phantoms to characterize system performance. An imaging speed of 16 frames per second was determined to be adequate to suppress motion artifacts from cardiac pulsation for in vivo applications. The translational capability of this system for the detection of lipid-laden plaques was validated by ex vivo imaging of an atherosclerotic human coronary artery at 16 frames per second, which showed strong correlation to gold-standard histopathology. Thus, this high-speed IVPA-US imaging system presents significant advances in the translational intravascular and other endoscopic applications.

Real-time Triple-modal Photoacoustic, Ultrasound, and Magnetic Resonance Fusion Imaging of Humans

Abstract: Imaging that fuses multiple modes has become a useful tool for diagnosis and therapeutic monitoring. As a next step, real-time fusion imaging has attracted interest as for a tool to guide surgery. One widespread fusion imaging technique in surgery combines real-time ultrasound (US) imaging and pre-acquired magnetic resonance (MR) imaging. However, US imaging visualizes only structural information with relatively low contrast. Here, we present a photoacoustic (PA), US, and MR fusion imaging system which integrates a clinical PA and US imaging system with an optical tracking-based navigation sub-system. Through co-registration of pre-acquired MR and real-time PA/US images, overlaid PA, US, and MR images can be concurrently displayed in real time. We successfully acquired fusion images from a phantom and a blood vessel in a human forearm. This fusion imaging can complementarily delineate the morphological and vascular structure of tissues with good contrast and sensitivity, has a well-established user interface, and can be flexibly integrated with clinical environments. As a novel fusion imaging, the proposed triple-mode imaging can provide comprehensive image guidance in real time, and can potentially assist various surgeries.

Lung magnetic resonance imaging for pneumonia in children

Abstract: Technical factors have historically limited the role of MRI in the evaluation of pneumonia in children in routine clinical practice. As imaging technology has advanced, recent studies utilizing practical MR imaging protocols have shown MRI to be an accurate potential alternative to CT for the evaluation of pneumonia and its complications. This article provides up-to-date MR imaging techniques that can be implemented in most radiology departments to evaluate pneumonia in children. Imaging findings in pneumonia on MRI are also reviewed. In addition, the current literature describing the diagnostic performance of MRI for pneumonia is discussed. Furthermore, potential risks and limitations of MRI for the evaluation of pneumonia in children are described.

Imaging of post-operative spine in intervertebral disc pathology

Abstract: This work is an imaging review of spine after surgery with special regard to imaging modality in intervertebral disc pathology. Advances in imaging technology can be evaluated. Depending on the clinical question is asked to the radiologist, it is possible to evaluate post-operative patients with conventional radiology (X-ray), computed tomography and magnetic resonance. Main indications for each technique are analysed. Imaging is important in the diagnosis of many forms of spine pathology and plays a fundamental role in evaluating post-surgical effects of treatments, according to the imaging method which is used, both on spine and on its surrounding tissues (intervertebral discs, spinal cord, muscles and vessels).

“How to” incorporate dual-energy imaging into a high volume abdominal imaging practice

Abstract: Dual-energy CT imaging has many potential uses in abdominal imaging. It also has unique requirements for protocol creation depending on the dual-energy scanning technique that is being utilized. It also generates several new types of images which can increase the complexity of image creation and image interpretation. The purpose of this article is to review, for rapid switching and dual-source dual-energy platforms, methods for creating dual-energy protocols, different approaches for efficiently creating dual-energy images, and an approach to navigating and using dual-energy images at the reading station all using the example of a pancreatic multiphasic protocol. It will also review the three most commonly used types of dual-energy images: “workhorse” 120kVp surrogate images (including blended polychromatic and 70 keV monochromatic), high contrast images (e.g., low energy monochromatic and iodine material decomposition images), and virtual unenhanced images. Recent developments, such as the ability to create automatically on the scanner the most common dual-energy images types, namely new “Mono+” images for the DSDECT (dual-source dual-energy CT) platform will also be addressed. Finally, an approach to image interpretation using automated “hanging protocols” will also be covered. Successful dual-energy implementation in a high volume practice requires careful attention to each of these steps of scanning, image creation, and image interpretation.

Imaging Bronchopulmonary Dysplasia-A Multimodality Update.

Abstract: Bronchopulmonary dysplasia is the most common form of infantile chronic lung disease and results in significant healthcare expenditure. The roles of chest radiography and computed tomography are well documented but numerous recent advances in imaging technology have paved the way for newer imaging techniques including structural pulmonary assessment via lung MRI, functional assessment via ventilation and perfusion MRI and quantitative imaging techniques using both CT and MRI. New applications for ultrasound have also been suggested. With the increasing array of complex technologies available, it is becoming increasingly important to have a deeper knowledge of the technological advances of the past 5-10 years and particularly the limitations of some newer techniques currently undergoing intense research. This review article aims to cover the most salient advances relevant to BPD imaging, particularly advances within CT technology, post processing and quantitative CT; structural MRI assessment, ventilation and perfusion imaging using gas contrast agents and Fourier decomposition techniques and lung ultrasound.

Current Perspective on In Vivo Molecular Imaging of Immune Cells.

Abstract: Contemporaneous development of improved immune cell-based therapies, and powerful imaging tools, has prompted growth in technologies for immune cell tracking in vivo. Over the past couple of decades, imaging tools such as magnetic resonance imaging (MRI) and optical imaging have successfully monitored the trafficking patterns of therapeutic immune cells and assisted the evaluation of the success or failure of immunotherapy. Recent advancements in imaging technology have made imaging an indispensable module of immune cell-based therapies. In this review, emerging applications of non-radiation imaging modalities for the tracking of a range of immune cells are discussed. Applications of MRI, NIR, and other imaging tools have demonstrated the potential of non-invasively surveying the fate of both phagocytic and non-phagocytic immune cells in vivo.

An on-chip instrument for white blood cells classification based on a lens-less shadow imaging technique.

Abstract: Routine blood tests provide important basic information for disease diagnoses. The proportions of three subtypes of white blood cells (WBCs), which are neutrophils, monocytes, lymphocytes, is key information for disease diagnosis. However, current instruments for routine blood tests, such as blood cell analyzers, flow cytometers, and optical microscopes, are cumbersome, time consuming and expensive. To make a smaller, automatic low-cost blood cell analyzer, much research has focused on a technique called lens-less shadow imaging, which can obtain microscopic images of cells in a lens-less system. Nevertheless, the efficiency of this imaging system is not satisfactory because of two problems: low resolution and imaging diffraction phenomena. In this paper, a novel method of classifying cells with the shadow imaging technique was proposed. It could be used for the classification of the three subtypes of WBCs, and the correlation of the results of classification between the proposed system and the reference system (BC-5180, Mindray) was 0.93. However, the instrument was only 10 × 10 × 10 cm, and the cost was less than $100. Depending on the lens-free shadow imaging technology, the main hardware could be integrated on a chip scale and could be called an on-chip instrument.

A Dual-Modality System for Both Multi-Color Ultrasound-Switchable Fluorescence and Ultrasound Imaging

Abstract: Simultaneous imaging of multiple targets (SIMT) in opaque biological tissues is an important goal for molecular imaging in the future. Multi-color fluorescence imaging in deep tissues is a promising technology to reach this goal. In this work, we developed a dual-modality imaging system by combining our recently developed ultrasound-switchable fluorescence (USF) imaging technology with the conventional ultrasound (US) B-mode imaging. This dual-modality system can simultaneously image tissue acoustic structure information and multi-color fluorophores in centimeter-deep tissue with comparable spatial resolutions. To conduct USF imaging on the same plane (i.e., x-z plane) as US imaging, we adopted two 90°-crossed ultrasound transducers with an overlapped focal region, while the US transducer (the third one) was positioned at the center of these two USF transducers. Thus, the axial resolution of USF is close to the lateral resolution, which allows a point-by-point USF scanning on the same plane as the US imaging. Both multi-color USF and ultrasound imaging of a tissue phantom were demonstrated.

Cone-Beam Three-Dimensional Dental Volumetric Tomography in Dental Practice

Abstract: Imaging methods are of great importance for diagnosis and treatment in dentistry. With technological advances, great progress has been made in these methods. Over time, 3-dimensional (3-D) imaging has replaced 2-dimensional, thereby providing examination of objects in all directions. Of these methods, which play an important role in the clinical evaluation of patients, cone-beam computed tomography (CBCT) is the newest and most advanced imaging method. This method will revolutionize dental in comparison with conventional CT, it has several advantages, including a shorter scanning time, low radiation dose, low cost and the acquisition of high-resolution images. With 3-D imaging technology, this method has introduced the possibility of applying several procedures from diagnosis in the maxillofacial region to operative and surgical procedures. Although very clear results are not obtained from the imaging of soft tissues, the most important advantage of this technology is the capability of imaging hard and soft tissues together. How to cite this article: Cangul S, Adiguzel O. Cone-Beam Three-Dimensional Dental Volumetric Tomography in Dental Practice. Int Dent Res 2017;7:62-70. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Innovative uses of thermal imaging in civil engineering

Abstract: Thermal imaging captures information in the infrared spectrum of light invisible to people, thus it can provide valuable extra information. Innovative use of thermal imaging technology can therefore play an important role in many civil engineering applications. This paper provides insight into thermal imaging technology and its uses in civil engineering. A field example of early leak detection in an earth embankment using thermal imaging technology is presented. With ever-improving thermal imaging technology and decreasing cost of thermal imaging cameras, many future uses of thermal imaging in civil engineering are envisaged – from pipeline leak detection to structural integrity inspections, energy efficiency surveys and pollution monitoring. The small size of the equipment means it can also be carried by drones, offering access to remote or otherwise inaccessible areas.

Real-time three-dimensional laser fluorescence microscopic imaging device

Abstract: The invention relates to a real-time three-dimensional laser fluorescence microscopic imaging device. The real-time three-dimensional laser fluorescence microscopic imaging device is compatible with a traditional bright field illumination microscopic imaging working mode. The real-time three-dimensional laser fluorescence microscopic imaging device is divided into a laser excitation module, a bright field imaging illumination module, a digital detection module, an eyepiece observation module and a control module according to functions. A spatial light modulator is adopted to load a pyramid phase, so that a Gaussian-Bessel illumination light field can be generated at the backfield of a focusing objective lens. In a detection optical path, a twisted Dammann grating is additionally adopted so as to realize simultaneous imaging of a multi-surface object, fluorescence collected from the objective lens simultaneously images a plurality of axial planes to an electron-enhanced CCD detection surface through a multi-surface imaging technology, and therefore, real-time three-dimensional fluorescence imaging can be realized. The real-time three-dimensional fluorescence imaging technique has an important practical value in biological living tissue and living cell microscopic imaging.

Label-free hyperspectral imaging and quantification methods for surgical margin assessment of tissue specimens of cancer patients

Abstract: Hyperspectral imaging (HSI) is a relatively new modality in medicine and can have many potential applications. In this study, we developed label-free hyperspectral imaging for tumor margin assessment. HSI data, hypercube (x,y,λ), consists of a series of images of the same field of view that are acquired at different wavelengths. Every pixel in the hypercube has an optical spectrum. We collected surgical tissue specimens from 16 human subjects who underwent head and neck (H&N) cancer surgery. We acquired both HSI, autofluorescence images, and fluorescence images with 2-NBDG and proflavine from the specimens. Digitized histologic slides were examined by an H&N pathologist. We developed image preprocessing and classification methods for HSI data and differentiate cancer from benign tissue. The hyperspectral imaging and classification method was able to distinguish between cancer and normal tissue from oral cavity with an average accuracy of 90±8%, sensitivity of 89±9%, and specificity of 91±6%. This study suggests that label-free hyperspectral imaging has great potential for surgical margin assessment in tissue specimens of H&N cancer patients. Further development of the imaging technology and quantification methods is warranted for its application in image-guided surgery.

Noise Model of a Multispectral TDI CCD Imaging System and Its Parameter Estimation of Piecewise Weighted Least Square Fitting

Abstract: The time-delayed integration (TDI) charge-coupled device (CCD) imaging technology is widely used in remote sensing field and accurate estimation of noise level is essential to assure good performance of denoising. Therefore, in order to achieve images with high signal-to-noise ratio by the TDI CCD sensor, the noise model of the imaging system is investigated. First, the design of the imaging circuit system is presented, and the main noises of the system are analyzed, such as the TDI CCD sensor, amplifiers, and so on. Then a theoretical noise model of the imaging system is established as a priori information. An improved least square fitting method of parameter estimation is proposed. To validate the theoretical model and the proposed method, extensive tests are carried out to obtain multiple uniform images on a developed TDI CCD imaging system. The experiment results confirm that a precise noise model can be achieved by this method and it verifies the theoretical model, meanwhile. It can be used for noise removal and aided design of imaging systems to acquire high-quality images. It is meaningful for remote sensing to obtain more targets of interest.

Imaging Advances in Urolithiasis

Abstract: The prevalence of urinary stones in the United States has been described as 1 in 11 persons reporting a history of stones. Imaging plays a crucial role in diagnosis, management, and follow-up for these patients and imaging technology over the last 100 years has advanced as the disease prevalence has increased. CT remains the gold standard for imaging urolithiasis and changes in this technology, with the addition of multidetector CT and dual-energy CT, as well as the changes in utilization of CT, have decreased the radiation dose encountered by patients and allowed for improved stone detection. The use of digital tomography has been introduced for follow-up of recurrent stone formers offering the potential to lower radiation exposure over the course of a patient's lifelong treatment. However, there is still a demand for improved imaging techniques to detect smaller stones and stones in larger patients at lower radiation doses as well as the continued need for the judicious use of all imaging modalities for healthcare cost containment and patient safety.

Principles and applications of high-speed single-pixel imaging technology

Abstract: Single-pixel imaging (SPI) technology has garnered great interest within the last decade because of its ability to record high-resolution images using a single-pixel detector. It has been applied to diverse fields, such as magnetic resonance imaging (MRI), aerospace remote sensing, terahertz photography, and hyperspectral imaging. Compared with conventional silicon-based cameras, single-pixel cameras (SPCs) can achieve image compression and operate over a much broader spectral range. However, the imaging speed of SPCs is governed by the response time of digital micromirror devices (DMDs) and the amount of compression of acquired images, leading to low (ms-level) temporal resolution. Consequently, it is particularly challenging for SPCs to investigate fast dynamic phenomena, which is required commonly in microscopy. Recently, a unique approach based on photonic time stretch (PTS) to achieve high-speed SPI has been reported. It achieves a frame rate far beyond that can be reached with conventional SPCs. In this paper, we first introduce the principles and applications of the PTS technique. Then the basic architecture of the high-speed SPI system is presented, and an imaging flow cytometer with high speed and high throughput is demonstrated experimentally. Finally, the limitations and potential applications of high-speed SPI are discussed.

Miniaturisation of Pressure-Sensitive Paint Measurement Systems Using Low-Cost, Miniaturised Machine Vision Cameras.

Abstract: Measurements of pressure-sensitive paint (PSP) have been performed using new or non-scientific imaging technology based on machine vision tools. Machine vision camera systems are typically used for automated inspection or process monitoring. Such devices offer the benefits of lower cost and reduced size compared with typically scientific-grade cameras; however, their optical qualities and suitability have yet to be determined. This research intends to show relevant imaging characteristics and also show the applicability of such imaging technology for PSP. Details of camera performance are benchmarked and compared to standard scientific imaging equipment and subsequent PSP tests are conducted using a static calibration chamber. The findings demonstrate that machine vision technology can be used for PSP measurements, opening up the possibility of performing measurements on-board small-scale model such as those used for wind tunnel testing or measurements in confined spaces with limited optical access.

Statistical Shape Models of the Heart: Applications to Cardiac Imaging

Abstract: Recent advances in imaging technology have enabled the non-invasive study of the structure and the function of the heart, the valves and the vascular system. Different imaging modalities are routinely used to provide specific and complementary diagnostic and prognostic information. Computerized analysis plays a crucial role to in quantifying cardiac function from non-invasive imaging. To this respect, model-based techniques, such as statistical shape models (SSMs), have become a popular solution for the detection of different cardiac structures. In this two-steps approach, a statistical model, trained on a set of samples to encode the morphology and the statistical variability of the structure of interest, is applied to segment the same structure in new images constraining the possible deformations only to plausible shapes observed in the training set. The aim of this chapter is to give a summary of the current state-of-the-art of SSMs in cardiac imaging. In particular, the most relevant and recent SSMs applications proposed for a specific structure (left ventricle, right ventricle, atria and valves) or more cardiac structures together (left and right ventricles, four chambers and entire heart) will be discussed. Furthermore, the potential usefulness of this technique as well as its robustness when applied to different imaging modalities are reviewed.

Medical devices, systems, and methods for performing eye exams using displays comprising mems scanning mirrors

Abstract: An instalment for imaging the eye and performing ophthalmic diagnostic tests is disclosed that obtain images of the stractures of the eye using imaging technology such as optical coherence tomography (OCT). To assist with such imaging and/or provide additional diagnostics, the ophthalmic diagnostic instrument may additionally include a display for presenting images to the subject whose eyes and vision are being evaluated. This display system, may comprise a MEMS (microelectromechanical system) scanning mirror.

Multi-modality Imaging Assessment of Pericardial Masses

Abstract: This review will discuss the application of various imaging modalities including their advantages and disadvantages in the evaluation of the most common pericardial masses with a focus on pericardial cysts, tumors, and hematomas. Accurate identification of pericardial masses and assessment of potential hemodynamic compromise is imperative for management. Cardiac imaging plays a central role in tissue characterization as well as evaluation of extension into neighboring structures. Currently, echocardiography is the preferred modality for the initial evaluation due to its low cost and widespread availability. However, due to potential limitations with echocardiography, computed tomography (CT), and cardiac magnetic resonance (CMR) imaging have become robust complementary imaging tests. CT provides superior spatial resolution and is the ideal test for evaluation of calcified masses while CMR provides excellent tissue characterization through various CMR sequences. Finally, positron emission tomography (PET) imaging can provide additional unique information in the assessment of potentially malignant tumors. An integrated, multi-modality imaging approach is helpful to evaluate the pericardium and diagnose pericardial masses. Advancements in imaging technology have provided improved diagnostic accuracy, with CT and CMR currently serving as complementary imaging techniques to traditional echocardiography imaging. Because each imaging modality has its unique sets of advantages and disadvantages, the choice of modality must be individualized to each patient. Through careful consideration, an integrated imaging approach is crucial in noninvasively providing information on cardiac structure, morphology, function, and associated complications that are important to the diagnosis and management of a variety of pericardial masses.

All-optically integrated photoacoustic and optical coherence tomography: A review

Abstract: All-optically integrated photoacoustic (PA) and optical coherence tomography (OCT) dual-mode imaging technology that could offer comprehensive pathological information for accurate diagnosis in clinic has gradually become a promising imaging technology in the aspect of biomedical imaging during the recent years This review refers to the technology aspects of all-optical PA detection and system evolution of optically integrated PA and OCT, including Michelson interferometer dual-mode imaging system, Fabry–Perot (FP) interferometer dual-mode imaging system and Mach–Zehnder interferometer dual-mode imaging system It is believed that the optically integrated PA and OCT has great potential applications in biomedical imaging

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.