Imaging technology

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

Image sensor requirements for 2D barcode scanning

Abstract: Over the past few years imaging technology has advanced significantly to enable high performance, imaging-based barcode scanners. The improved performance and decreased cost of imaging technology has enabled the wide deployment of 2D barcodes for many applications across many vertical industries. Imaging-based barcode scanner products are now the most rapidly growing segment of the industry. Following a brief introduction to 2D barcodes and their applications, the imaging technology requirements unique to barcode scanning are presented. The camera designs are broken down into their significant components, such as the lens system, image sensor electronics, flash illumination and target aiming. The camera design is contrasted with the design of a common mobile phone camera.

Chest in children: what to do and when to do it

Abstract: The pediatric chest radiograph remains the most frequently requested imaging study worldwide. However, pediatricians, neonatologists and pediatric radiologists appreciate the increased diagnostic yield provided by new radiological technology. The evolution of imaging technology has led to an unprecedented ability to evaluate chest anatomy and abnormalities. The advances in equipment and innovative imaging techniques include rapid imaging, three-dimensional capability, high-resolution and angiographic techniques in computed tomography (CT) and magnetic resonance imaging (MRI), and improved transducer technology, pulsed Doppler and color Doppler imaging in ultrasound (US). Many novel image-guided interventional procedures have also been developed. These and other refinements have enabled recognition of more subtle pathological changes and have led to a greater understanding of cardiopulmonary disease processes. Clinical and therapeutic advances have altered our perspective of many diseases and clarified how and when imaging can be useful. This presentation will focus on the areas of pediatric chest imaging in which progress has been made, and in which imaging and management approaches have changed as a result of these technical achievements. Radiography remains the primary imaging technique in the evaluation of most chest diseases, as it has the capability to confirm or exclude numerous conditions. It is the first step in chest evaluation and guides further investigation with other radiological techniques, such as US, CT and MRI. The applications of chest US have expanded over time. This technique has several advantages that are beneficial in children: it does not use ionizing radiation; color and power Doppler abilities permit study of vascular structures without the use of intravenous contrast, the examination does not require sedation in most cases and it can be performed bedside. US is useful for evaluating the lung, pleura and mediastinum, and is especially helpful for rapid assessment of patients with complete opacification of a hemithorax at chest radiography. It is the method of choice for characterizing pleural fluid collections, to determine whether the thymus is normal and for distinguishing solid from cystic masses in equivocal cases. Recent major advances in CT technology, with meticulous attention to the technique, have improved the sensitivity and specificity of pediatric CT imaging and resulted in improved diagnostic accuracy. The benefits of helical CT include speed, improved image quality, possibility for optimized use of intravenous contrast and reduced sedation rates. The main applications are evaluation of pulmonary nodules and masses, vascular anatomy (CT angiography), central airways and critically ill patients. High-resolution CT techniques enable imaging of the lung and its interstitium with excellent spatial resolution. Most patients younger than 6 years undergoing MR study will require sedation or general anesthesia. The main clinical indications for MR are evaluation of masses and chest wall lesions, and investigation of vascular or cardiac abnormalities. DOI 10.1007/s00247-011-2059-6 Pediatr Radiol (2011) 41 (Suppl 1):S64

Analysis on several issues of infrared imaging guided technology

Abstract: Since the advent of the first infrared guidance system, its excellent properties countries have invested a lot of effort to study the infrared guidance technology. After the rapid development of three generations of the detector type changing, it has made a lot of sophisticated applications. The past 20 years, the application of imaging infrared seeker technology -infrared imaging guided weapons, wars abroad have played a decisive role. And with the scientific and technological progresses and changes in battlefield needs, infrared imaging technology is faced new opportunities and challenges. In this article, the course of development of IR imaging guidance technology and weapons was described, and the characteristics and development trend of IR imaging guidance technology in modern war was discussed. Finally, the summary of the status and expectations was elaborated.

Study on super-resolution three-dimensional range-gated imaging technology

Abstract: Range-gated three dimensional imaging technology is a hotspot in recent years, because of the advantages of high spatial resolution, high range accuracy, long range, and simultaneous reflection of target reflectivity information. Based on the study of the principle of intensity-related method, this paper has carried out theoretical analysis and experimental research. The experimental system adopts the high power pulsed semiconductor laser as light source, gated ICCD as the imaging device, can realize the imaging depth and distance flexible adjustment to achieve different work mode. The imaging experiment of small imaging depth is carried out aiming at building 500m away, and 26 group images were obtained with distance step 1.5m. In this paper, the calculation method of 3D point cloud based on triangle method is analyzed, and 15m depth slice of the target 3D point cloud are obtained by using two frame images, the distance precision is better than 0.5m. The influence of signal to noise ratio, illumination uniformity and image brightness on distance accuracy are analyzed. Based on the comparison with the time-slicing method, a method for improving the linearity of point cloud is proposed.

Chapter 19:Imaging Modalities for Manganese Toxicity

Abstract: Rapidly advancing imaging technology has been essential to the study of manganese (Mn) toxicity in vivo. Over the past few decades, imaging techniques have been effectively utilized as markers of Mn exposure and to investigate the biological effects of Mn neurotoxicity. This chapter will review several of the imaging modalities that have made an impact in Mn neurotoxicity research. The scope of this chapter will include discussions of magnetic resonance imaging (MRI), including magnetic resonance spectroscopy (MRS), diffusion weighted imaging (DWI), and functional MRI (fMRI), as well as positron emission tomography (PET), single photon emission computed tomography (SPECT), and X-ray fluorescence imaging. For each modality, the basic principle of the imaging technique will be briefly described to facilitate proper data interpretation and understanding of limitations. This will be followed by a discussion on the main research findings using that modality, and how they have shaped our understanding of Mn toxicity.