Intraprocedural imaging: Flat panel detectors, rotational angiography, FluoroCT, IVUS, or still the portable C-arm? For the first time, a team at HZB has identified the atomic substructure of amorphous silicon with a resolution of 0.8 nanometres using X-ray and neutron scattering at BESSY II … No thin-film-transistor (TFT) technology C. A scintillator material to produce light in a two-step process D. Amorphous silicon bonded to amorphous selenium as a two-step process Last Modified Date: December 27, 2020. 89, No. amorphous silicon flat-panel-detector radiography prior to the spatial frequency filtering to the storage-phosphor radiography, the visibility of the hilum, heart border and ribs on the flat-panel-detector radiography was sig-nificantly superior and the visibility of the thoracic spine was inferior to that on the storage-phosphor radiogra- MATERIAL AND METHODS: The study enrolled 44 patients with known or presumed skeletal changes of the hand associated with inflammatory rheumatic diseases. 1, 1 May 2010 | Japanese Journal of Radiology, Vol. 229, No. 11, 19 October 2016 | Journal of Instrumentation, Vol. PURPOSE: To determine the performance of amorphous silicon flat-panel detector radiography compared to mammography film in detecting rheumatologic bone defects at different exposure doses. 4, Technology in Cancer Research & Treatment, Vol. 40, No. 1, American Journal of Roentgenology, Vol. The measurement of DQE yielded a high value of 70% at zero spatial frequency. Conventional images were compared with digital images acquired with equal dose (2.5 microGy) and with 50% dose reduction. 30, No. 53, No. MATERIALS AND METHODS: The study was approved by the institutional ethics committee. 4, Japanese Journal of Radiological Technology, Vol. 2, 1 January 2003 | Radiology, Vol. 31, No. 3, Journal of Thoracic Imaging, Vol. 2, European Journal of Radiology, Vol. 1From the Department of Radiology, Digital Imaging Research Division, Duke University Medical Center, Box 3302, Room 139, Bryan Research Building, Durham, NC 27710 (all authors); and the Department of Biomedical Engineering, Duke University, Durham, NC (C.E.F., R.J.W., J.T.D., A.H.B.). 41, No. 5, 30 November 2016 | Medical Physics, Vol. The purpose of this study was to evaluate a large-area, flat-panel X-ray detector, which uses cesium-iodide (CsI) and amorphous silicon (a-Si). 4, 17 January 2003 | Medical Physics, Vol. On this page we describe photoconductors and compare them with phosphor screens, and discuss why we choose to … 1-3, Japanese Journal of Radiological Technology, Vol. MATERIALS AND METHODS: The 41 × 41-cm digital FPD is constructed on a single monolithic glass substrate with a structured cesium iodide scintillator layer and an amorphous silicon thin-film transistor array for image readout. 68, No. 31, No. 226, No. Amorphous silicon photoreceptor drum has changed the idea about a photoreceptor; from a consumable component to a long life unit having a service life equivalent to that of the machine in which it is used. For example, a-Si layers can be made thinner than c-Si, which may produce savings on silicon material cost. Results with the FPD system were compared to those with a storage phosphor computed radiography (CR) system. 6, 20 April 2004 | Medical Physics, Vol. 23, No. In the paper, we show the possibility of preparing amorphous SiOxNy-based materials from selected liquid organosilicon compounds, methyltrimethoxysilane CH3Si(OCH3)3 and methyltriethoxysilane CH3Si(OC2H5)3, by a … 1-3, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 15, No. These so-called “dangling” bonds impact the inherent properties of … ¾Mostly used for medical radiographic imaging Amorphous Silicon Flat Panel Image DetectorsAmorphous Silicon Flat Panel Image Detectors. 81, No. 33, No. 1, 1 May 2002 | Applied Optics, Vol. The advantages of digital radiography systems, based on a flat-panel detector as an instant image display, facilitation of work flow in the radiology department, and digital networking and archiving, are well in sight. 2, 24 June 2015 | Journal of Micromechanics and Microengineering, Vol. II. 1, European Journal of Radiology, Vol. 185, No. 7Part1, 1 March 2005 | Radiology, Vol. But material improvements and smaller pixels may see it move into the lead for the next generation of uncooled thermal imaging. The design and the performance of a 20 cm by 20 cm flat panel x-ray detector for digital radiography and fluoroscopy is described: Thin film amorphous silicon (aSi) technology has … Received March 9, 2000; revision requested April 26; revision received May 25; accepted June 15. The flat-panel detector furthermore has an MTF that is superior to that in regular screen-film systems and also provides a substantially larger dynamic range. Indirect capture digital radiography is unlike direct capture technology in that indirect technology uses A. Amorphous selenium B. 87, No. 10, Physics in Medicine & Biology, Vol. 1, Japanese Journal of Radiological Technology, Vol. Noise power spectruma), Imaging properties of digital magnification radiography, Image Quality and Detection Performance of a Direct Digital Radiography System, Experimental Evaluation of a Portable Indirect Flat-Panel Detector for the Pediatric Chest: Comparison with Storage Phosphor Radiography at Different Exposures by Using a Chest Phantom1, Chest Radiography with a Flat-Panel Detector: Image Quality with Dose Reduction after Copper Filtration1, Portable Flat-Panel Detector for Low-Dose Imaging in a Pediatric Intensive Care Unit, Comparison of Eight Different Digital Chest Radiography Systems: Variation in Detection of Simulated Chest Disease, Measurement of the detective quantum efficiency in digital detectors consistent with the IEC 62220-1 standard: Practical considerations regarding the choice of filter material, Comparative Scatter and Dose Performance of Slot-Scan and Full-Field Digital Chest Radiography Systems1, Computed Radiography and Direct Radiography, Chest Radiography with a Digital Flat-Panel Detector: Experimental Receiver Operating Characteristic Analysis1, Physical characteristics of a full-field digital mammography system, Fundamental imaging characteristics of a slot-scan digital chest radiographic system, Solid-state fluoroscopic imager for high-resolution angiography: Physical characteristics of an 8 cm×8 cm experimental prototype, Evaluation of the imaging properties of an amorphous selenium-based flat panel detector for digital fluoroscopy, Digital Slot-Scan Charge-coupled Device Radiography versus AMBER and Bucky Screen-Film Radiography for Detection of Simulated Nodules and Interstitial Disease in a Chest Phantom1, Evaluation of the use of six diagnostic X-ray spectra computer codes, a−Si:H/CsI(Tl) flat-panel versus computed radiography for chest imaging applications: image quality metrics measurement, Lumbar Spine Radiography: Digital Flat-Panel Detector versus Screen-Film and Storage-Phosphor Systems in Monkeys as a Pediatric Model1, Dose Reduction in Patients Undergoing Chest Imaging: The active matrix size of 3000. 4, Journal of Thoracic Imaging, Vol. 52, No. 31, No. Flat-panel detectors: how much better are they? Amorphous Selenium (a-Se) Many of the detector systems being developed in our lab use a photoconductor called amorphous Selenium (a-Se) as the X-ray detector material, i.e. 117, No. 12, Radiation Protection Dosimetry, Vol. 6Part1, Journal of Thoracic Imaging, Vol. 8, 1 January 2009 | Radiology, Vol. 3, 25 June 2003 | Medical Physics, Vol. 41, No. In this study, the low-contrast performance of an amorphous silicon/cesium iodide (aSi/Csl)-based flat-panel digital chest radiography … 915, 22 December 2003 | Medical Physics, Vol. Digital radiography with a large-area, amorphous-silicon, flat-panel x-ray detector system. The scintillator consisted of a layer of structured cesium iodide. 62, No. 3, Journal of Vascular Surgery, Vol. CONCLUSION: The FPD provides radiographic images with excellent inherent physical image quality. 9, No. 1, 26 March 2003 | Medical Physics, Vol. 28, No. Amorphous silicon appears to be an attractive material for making two dimensional, position sensitive x-ray and particle detectors. The scintillator consisted of a layer of structured cesium iodide. The amorphous silicon flat-panel detector radiography system allowed an important and significant reduction in both entrance skin dose and effective dose compared with the film-screen radiography (× 2.7 decrease) or computed radiography (× 1.7 decrease) system. Amorphous silicon brings key advantages unmatched by other technologies, including: - radiation hardness > 1MRad - widest input energy range - immunity from single photon events in the substrate In May of 2017, Varex Imaging Corporation passed an amazing milestone: the sale of its 100,000th amorphous silicon flat panel detector. (e-mail. 22, Physics in Medicine & Biology, Vol. 65, No. Amorphous silicon image sensor technology provides the opportunity to have large format size similar to x-ray film, high resolution, and a compact package for ease of use in NDE applications. 4, 4 July 2006 | Radiation Protection Dosimetry, Vol. The contrast and scatter content of images acquired with the FPD were equivalent to those acquired with the storage phosphor system. al flat-panel detector. These detectors were originally designed for radiography and uoroscopy, but because of their compactness, exibility, low spatial distortion, and relative low-cost, 33, No. Invest Radiol 2000;35:260–266. 2, 21 June 2005 | Medical Physics, Vol. 2, American Journal of Roentgenology, Vol. 7, 13 January 2008 | Journal of Applied Clinical Medical Physics, Vol. 6Part1, 30 November 2016 | Medical Physics, Vol. 25, No. Today’s sharing is here first. X-ray images can be measured by scanning of a single linear sensor with a Gd 2 O 2 S phosphor sheet set on a sliding stage. Flat-panel (FP) based digital radiography systems have recently been introduced as a new and improved digital radiography technology; it is important to evaluate and compare this new technology with currently widely used conventional screen/film (SF) and computed radiography (CR) techniques. 30, No. Chest radiographs can be acquired with a significantly lower patient radiation dose using an amorphous silicon flat-panel system than using an amorphous selenium flat-panel system, thereby producing images that are equal or even superior in quality to those of the amorphous selenium flat-panel detector system. The term "amorphous silica" is used here for the pure forms of SiO 2such as colloidal silica, precipitated silica, silica gel, pyrogenic silica, silica fume, quartz glass, fused silica and also the skeletons of Radiolaria and diatoms in the form of diatomaceous 9, 21 September 2012 | Medical Physics, Vol. 11, No. 10, 1 February 2011 | Physics in Medicine and Biology, Vol. 10, 14 March 2016 | Wireless Personal Communications, Vol. In addition, our company specializes in producing image intensifier TV systems. 35(4):260-266, APRIL 2000. Spahn M, Strotzer M, Völk M, et al. Silicon oxynitrides (SiOxNy) have many advantageous properties for modern ceramic applications that justify a development of their new and efficient preparation methods. 3, 1 November 2005 | Radiology, Vol. METHODS. 9, 24 May 2004 | Medical Physics, Vol. 36, No. 21, No. 231, No. 234, No. Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username. Both use TFTs. One such device, a large-area, flat-panel, amorphous silicon imaging array, has been developed and is currently being tested.