• rays
  • Also, the method uses a thickness of the compressed breast and the attenuation of gamma rays in soft tissue to determine the depth of the tumor from the collimator face of the detector head. (google.co.uk)
  • The applications of scintigraphy include early drug development and nuclear medical imaging to view and analyse images of the human body or the distribution of medically injected, inhaled, or ingested radionuclides emitting gamma rays. (wikipedia.org)
  • The highly efficient capture method of this combination for detecting gamma rays was discovered in 1944 by Sir Samuel Curran whilst he was working on the Manhattan Project at the University of California at Berkeley. (wikipedia.org)
  • The initial phenomenon of the excited electron is similar to the photoelectric effect and (particularly with gamma rays) the Compton effect. (wikipedia.org)
  • The high-energy gamma rays emitted from black holes, centers of galaxies and pulsars do not reach the land as they get absorbed in the atmosphere. (wikipedia.org)
  • Very-high-energy (VHE) gamma rays offer a unique insight into some of the most extreme phenomena of our Universe. (wikipedia.org)
  • Detection of celestial VHE gamma rays allows the study of exotic objects like pulsars, pulsar wind nebulae, super nova remnants, micro-quasars, active galactic nuclei etc where particles are accelerated to TeV (10 exp 12 eV) energies and beyond. (wikipedia.org)
  • This effective area is far larger in magnitude than the area of satellite instruments used for detecting gamma rays directly. (wikipedia.org)
  • Consistent detections of gamma rays above 100 MeV by the Fermi-LAT Collaboration and above 100 GeV by the MAGIC Collaboration were announced. (wikipedia.org)
  • The signal is consistent with ultra-high-energy protons accelerated in blazar jets, producing neutral pions (decaying into gamma rays) and charged pions (decaying into neutrinos). (wikipedia.org)
  • Nuclear bombs produce a very brief, intense burst of gamma rays less than one millionth of a second. (wikipedia.org)
  • Although their instrumentation offered no improvement over those on Vela 5, the Vela 6 satellites were launched on April 8, 1970, with the intention of determining the direction from which the gamma rays were arriving. (wikipedia.org)
  • This separation meant that, despite gamma rays traveling at the speed of light, a signal would be detected at slightly different times by different satellites. (wikipedia.org)
  • In 1973, Ray Klebesadel, Roy Olson, and Ian Strong of the University of California Los Alamos Scientific Laboratory published Observations of Gamma-Ray Bursts of Cosmic Origin, identifying a cosmic source for the previously unexplained observations of gamma-rays. (wikipedia.org)
  • bursts
  • The main multi-messenger sources outside the heliosphere are expected to be compact binary pairs (black holes and neutron stars), supernovae, irregular neutron stars, gamma-ray bursts, active galactic nuclei, and relativistic jets. (wikipedia.org)
  • The Pi of the Sky project operated two wide-angle cameras that searched for the optical signature of gamma ray bursts at LCO starting in 2004. (wikipedia.org)
  • After these satellites detected fifteen other GRBs, Ray Klebesadel of the Los Alamos National Laboratory published the first paper on the subject, Observations of Gamma-Ray Bursts of Cosmic Origin. (wikipedia.org)
  • Gamma-ray bursts were discovered in the late 1960s by the U.S. Vela nuclear test detection satellites. (wikipedia.org)
  • While these characteristics were incorporated into the Vela system to improve the detection of nuclear weapons, these same characteristics were what made the satellites capable of detecting gamma-ray bursts. (wikipedia.org)
  • Because the sensitivity and time resolution on these satellites were significantly more accurate than the instruments on Vela 4, the Los Alamos team expected these new satellites to detect more gamma-ray bursts. (wikipedia.org)
  • By analyzing the arrival times, Klebesadel and his team successfully traced sixteen gamma-ray bursts. (wikipedia.org)
  • Shortly after the discovery of gamma-ray bursts, a general consensus arose within the astronomical community that in order to determine what caused them, they would have to be identified with astronomical objects at other wavelengths, particularly visible light, as this approach had been successfully applied to the fields of radio X-ray astronomy. (wikipedia.org)
  • This method would require far more accurate positions of several gamma-ray bursts than the Vela system could provide. (wikipedia.org)
  • SPECT
  • A SPECT system includes three gam camera heads (22a), (22b), (22c) which are mounted to a gantry (20) for rotation about a subject (12). (google.com)
  • The available Molecular Imaging and Therapeutics equipment at University Hospital include ten Anger Gamma cameras (including mobile, SPECT, and large field-of-view), dynamic 133 Xenon absolute quantitative blood flow measures, and dual x-ray absorptiometry. (uab.edu)
  • The VA Medical Center has five Anger Gamma cameras, three of which have SPECT/CT capability. (uab.edu)
  • A state of the art GE PET/CT camera (with 64 slice CT) has recently been installed, and an additional SPECT/CT camera will soon be installed as well. (uab.edu)
  • First attempts to obtain SPECT images of rodents with a high resolution were based on use of pinhole collimators attached to convectional gamma cameras. (wikipedia.org)
  • unlike
  • Disadvantages include the very long imaging time (several minutes) due to the need to separately cover each target area, unlike a gamma camera which has a much larger field of view, and the motion artefacts this can result in. (wikipedia.org)
  • detection
  • A high-resolution imaging camera weighing about 1200 kg, for detection and characterization of the atmospheric Cherenkov events, forms the focal plane instrumentation of the telescope. (wikipedia.org)
  • typically
  • In 2006 Oscar Spierenburg, a Dutch film director, noticed a discussion taking place on DVInfo.net entitled "3 channel 36 bit 1280 X 720 low $ camera", inside which Elphel cameras, which are typically used in scientific applications, had been mentioned. (wikipedia.org)
  • Physics
  • The telescope is the second-largest gamma ray telescope in the world and will help the scientific community enhance its understanding in the fields of astrophysics, fundamental physics, and particle acceleration mechanisms. (wikipedia.org)
  • wherein
  • 5. The combination of claim 3, wherein the first and second views are perpendicular to an axis of rotation of the camera. (google.co.uk)
  • 6. The combination of claim 2, wherein, as viewed perpendicular to an axis of rotation of the camera, one of said views appears perpendicular to said axis and another one of said views appears oblique thereto. (google.co.uk)
  • ward
  • The current facilities at St John's include a recently renovated accident and emergency ward, and a large maternity unit, where around 2,500 babies are born annually. (wikipedia.org)
  • sensor
  • The camera includes a manual focus wheel, mic and headphone jacks, and a slightly larger imaging sensor, producing 3200K gross pixels versus the HC5' 2100K. (wikipedia.org)
  • uses
  • The Anger camera uses sets of vacuum tube photomultipliers (PMT). (wikipedia.org)
  • In each generation Nikon uses different versions for its professional and consumer DSLRs / MILCs, whereas its compact cameras use totally different architectures. (wikipedia.org)
  • scanner
  • However, given the low cost of a gamma camera and its additional flexibility compared to a dedicated PET scanner, this technique is useful where the expense and resource implications of a PET scanner cannot be justified. (wikipedia.org)
  • energy
  • The total sum of the voltages from each photomultiplier, measured by a pulse height analyzer is proportional to the energy of the gamma ray interaction, thus allowing discrimination between different isotopes or between scattered and direct photons. (wikipedia.org)
  • body
  • Another object is to increase gamma camera sensitivity and resolution when imaging small body organs, particularly the heart and brain. (google.co.uk)
  • The Gamma Camera detects the pattern of distribution of the radionuclide in the body and sends this information to a computer. (peacehealth.org)
  • The Gamma Camera must be very close to you and will be moved over your body to obtain the pictures. (peacehealth.org)
  • additional
  • The Sony HVR-Z1U is the "professional" version of this camera with additional features such as balanced XLR audio inputs, DVCAM recording, and extended DSP capabilities (i.e. cine/gamma controls). (wikipedia.org)
  • data
  • The telescope has an integrated imaging camera, which contains 1088 photo multiplier-based pixels and all the signal processing and data acquisition electronics. (wikipedia.org)
  • An on-chip 32-bit microcontroller initiates and controls the operation and data transfers of all processors, modules and interfaces and can be seen as the main control unit of the camera. (wikipedia.org)
  • method
  • In order to obtain spatial information about the gamma-ray emissions from an imaging subject (e.g. a person's heart muscle cells which have absorbed an intravenous injected radioactive, usually thallium-201 or technetium-99m, medicinal imaging agent) a method of correlating the detected photons with their point of origin is required. (wikipedia.org)
  • allows
  • Mainly due to a larger settling time it allows improved conversion accuracy compared to the four channels in the previous Nikon D2X / D2Xs, Nikon D200 or the Canon EOS 5D Mark II. (wikipedia.org)
  • optical
  • The Large Binocular Telescope (LBT) is an optical telescope for astronomy located on 10,700-foot (3,300 m) Mount Graham, in the Pinaleno Mountains of southeastern Arizona, United States. (wikipedia.org)
  • it is also the largest monolithic, or non-segmented mirror, in an optical telescope. (wikipedia.org)
  • known
  • The construction of a gamma camera is sometimes known as a compartmental radiation construction. (wikipedia.org)
  • This prototype became known as AXIOM Alpha and was intended to gather feedback from typical shooting scenarios with a view to incorporating ideas into a future, more modular, kit version of the camera aimed at developers and early adopters (AXIOM Beta I Developer Kit). (wikipedia.org)
  • light
  • To detect these flashes of Cherenkov light, photomultiplier tube cameras are used at the focus of large tracking light collectors. (wikipedia.org)
  • sometimes
  • The largest group is however non-functioning tumors and usually present with a large mass or bleeding and sometimes difficult to delineate from a classical cancer. (thno.org)
  • team
  • As well as accommodating a large NHS medical practice, there is a Family Planning clinic, Genitourinary Medicine clinic, Community Pharmacy, District Nursing team, and Health Visitor team based in the building. (wikipedia.org)
  • combination
  • PURPOSE: This phase II trial is studying how well giving rituximab together with combination chemotherapy works in treating patients with stage II, stage III, or stage IV diffuse large B-cell non-Hodgkin's lymphoma. (stanford.edu)
  • world
  • The hospital has the largest single-floor critical care unit in the world, with 100 beds, and is the home of the Royal Centre for Defence Medicine for military personnel injured in conflict zones. (wikipedia.org)
  • built
  • custom-built large animal CT table for horse and farm animals up to 2,000 lbs. (osu.edu)