• detect
  • A gamma counter is a typical choice for measuring wipe samples for radioactivity as it allows multiple tests to be counted in a largely automated way.These systems detect radiation using a scintillator and photomultiplier tube and may allow the energy spectrum of a sample to be recorded, which can be used to identify the contaminant. (wikipedia.org)
  • Elscint's first product in this field was a nuclear camera designed to detect cancer, but it failed commercially. (wikipedia.org)
  • Multi-headed gamma cameras can also be used for Positron emission tomography (PET) scanning, provided that their hardware and software can be configured to detect "coincidences" (near simultaneous events on 2 different heads). (wikipedia.org)
  • photon
  • I-123 has a half life of approximately 13 hours and a gamma photon energy of 159 keV making it an appropriate radionuclide for medical imaging. (wikipedia.org)
  • rays
  • The very advantages of the scintillation crystals, namely, high sensitivity to gamma rays, wide range of physical size, response proportional to the incident radiation, rapid response time, and a fast decay time, tend to be attenuated by the requirements of encapsulating the crystals for use under ordinary operating conditions. (google.com)
  • All three systems are based on neutron interactions with the inspected items and examining the resultant gamma rays to determine the elements being radiated. (wikipedia.org)
  • FNA and PFNA use fast neutron scattering to generate the 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)
  • photons
  • The cobalt-60 units use gamma photons with a mean energy 1.25 MeV, which can penetrate up to 15-18 cm of steel. (wikipedia.org)
  • Gamma camera PET is markedly inferior to PET imaging with a purpose designed PET scanner, as the scintillator crystal has poor sensitivity for the high-energy annihilation photons, and the detector area is significantly smaller. (wikipedia.org)
  • The system accumulates events, or counts, of gamma photons that are absorbed by the crystal in the camera. (wikipedia.org)
  • involves
  • It involves inserting a fibre-optic tube containing a camera into the horse, which allows the vet to see what is at the tip of the tube through a small eyepiece, or on a TV screen. (horseandhound.co.uk)
  • conventional
  • Breast-specific gamma cameras have been developed with a smaller field of view than conventional cameras, allowing higher resolution imagery and compression of the breast as in x-ray mammography (which improves detection of smaller lesions). (wikipedia.org)
  • In the first half of the eighties Elscint acquired several other companies and also expanded its product offering to nuclear cameras, ultrasound, digital and conventional X-ray equipment, thus providing products for all medical imaging technologies. (wikipedia.org)
  • uses
  • X-ray radiography is similar to gamma-ray radiography but instead of using a radioactive source, it uses a high-energy bremsstrahlung spectrum with energy in the 5-10 MeV range created by a linear particle accelerator (LINAC). (wikipedia.org)
  • The Anger camera uses sets of vacuum tube photomultipliers (PMT). (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)
  • image
  • 10. A gamma camera system according to claim 1 wherein said display provides an image in real time. (google.co.uk)
  • 11. A gamma camera system according to claim 1 wherein said controller is operable to provide image data at a plurality of resolutions to said display. (google.co.uk)
  • 12. A gamma camera system according to claim 11 wherein an operator-operated resolution control, controls said image data resolution provided by said controller to said display. (google.co.uk)
  • 17. A gamma camera system according to claim 1 wherein said image detector comprises miniature PMT's. (google.co.uk)
  • This gamma camera is able to produce one column of an image. (wikipedia.org)
  • laboratory
  • The earliest lab based tests undertaken on the original version of the technology was performed at the Savannah River Site (SRS) Health Physics Instrument Calibration Laboratory (HPICL) using various gamma-ray sources and an x-ray machine with known radiological characteristics. (wikipedia.org)
  • device
  • The Radball is a 140 mm (5½") diameter deployable, passive, non electrical gamma hot-spot imaging device that offers a 360 degree view of the deployment area. (wikipedia.org)
  • Therefore, when the device is deployed inside a radioactive environment the collimation device preferentially allows gamma radiation to pass through the collimation holes which deposits tracks within the inner core. (wikipedia.org)
  • A wipe test counter is a device used to measure for possible radioactive contamination in a variety of environments. (wikipedia.org)
  • detection
  • 1 , 2 The limited value of vital dye compared with other regions means that the surgeon has to rely mainly on the preoperative lymphoscintigraphy and the intraoperative gamma ray detection probe. (pubmedcentralcanada.ca)
  • product
  • The radioisotopes decay according to their nature (there are several mechanisms), and often we see a radioactive product (called a daughter) created by the decay process. (answers.com)
  • equipment
  • With regards to the heavily collimated gamma camera technology, the technology also has a number of advantages including a much more compact size, less weight, no power and data umbilical as well as offering a lower financial risk should the equipment become contaminated. (wikipedia.org)
  • test
  • A swab or small absorbent smear can be used to "wipe" an area, the wipe is then placed into a test tube and counted, typically using a gamma counter. (wikipedia.org)
  • However
  • 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)
  • system
  • 2. A gamma camera system according to claim 1 wherein said controller is in or on said housing. (google.co.uk)
  • 3. A gamma camera system according to claim 1 wherein said controller is at a remote location from said housing. (google.co.uk)
  • 4. A gamma camera system according to claim 1 further comprising a transducer attached to said housing and in communication with said control. (google.co.uk)
  • 6. A gamma camera system according to claim 5 wherein an operator-operated distance control causes said display to display at least one of said distances. (google.co.uk)
  • 7. A gamma camera system according to claim 6 wherein said operator-operated controls are attached to said housing. (google.co.uk)
  • 9. A gamma camera system according to claim 1 wherein said camera is provided with a self-contained power supply that supplies power to said camera. (google.co.uk)
  • 13. A gamma camera system according to claim 1 , wherein said camera comprises a position transponder that provides position data of said camera, to said display. (google.co.uk)
  • 14. A gamma camera system according to claim 13 , wherein an operator-operated control on said housing causes said position transponder to provide at least one of said position information and orientation information to said display. (google.co.uk)
  • 18. A gamma camera system according to claim 1 wherein said display is adapted to move in relation to said housing. (google.co.uk)
  • 19. A gamma camera system according to claim 1 comprising a moveable articulation between said handle and said housing. (google.co.uk)
  • 20. A Gamma camera system according to claim 1 and including an antenna attached to said housing and in communication with said controller wherein said antenna is capable of transmitting and receiving data to a remote location. (google.co.uk)
  • medical
  • It has become obsolete in medical imaging, largely replaced by the gamma camera since the late 1960s. (wikipedia.org)
  • By 1975, sales of gamma scanners and other products generated $12 million in revenue, and a profit of $ 400,000 for Elscint, and Avraham Suhami decided to enter a new market - Computerized tomography, at the time a new emerging medical imaging technology. (wikipedia.org)
  • technique
  • Recently, multiphase CT angiography (without positive oral contrast) has been shown to play a promising role in the diagnoses of small and large bowel angiodysplasia, especially when associated with active hemorrhage Angiodysplasiae in the small bowel can also be diagnosed and treated with double-balloon enteroscopy, a technique involving a long endoscopic camera and overtube, both fitted with balloons, that allow the bowel to be accordioned over the camera. (wikipedia.org)
  • small
  • There are new less invasive procedures, where your surgeon may be able to make smaller incisions and use an endoscope (small camera attached to a thin tube) to complete your surgery. (ezilon.com)