Abstract:
The present specification provides a detector for an X-ray imaging system. The detector includes at least one high resolution layer having high resolution wavelength-shifting optical fibers, each fiber occupying a distinct region of the detector, at least one low resolution layer with low resolution regions, and a single segmented multi-channel photo-multiplier tube for coupling signals obtained from the high resolution fibers and the low resolution regions.
Abstract:
The present invention provides methods and systems for 3D imaging of in vivo and ex vivo tissues. The disclosed systems and methods employ an autoradiographic approach where particles emitted by a radioactive composition within the tissue are detected. Once detected, a 3D representation of the source of particles within the tissue is reconstructed for viewing and analysis.
Abstract:
The disclosed device for detecting the position and dose distribution of a therapeutic proton beam emitted in a pencil beam scanning mode comprises: a proton beam progressing position detection unit comprising a plurality of first optical fibers arranged along the first direction and a plurality of second optical fibers arranged along the second direction which is different from the first direction; and a proton beam dose distribution detection unit comprising a plurality of optical wavelength converter, each of which comprises an optical wavelength conversion disk and an optical wavelength-converting optical fibers arranged along the outer circumference of the optical wavelength conversion disk. The proton beam progressing position detection unit detects a proton beam progressing position through the arrangement of the first and second optical fibers, and the proton beam dose distribution detection unit detects a dose distribution of the proton beam progressing direction through a plurality of optical wavelength conversion disks.
Abstract:
The present invention discloses a microfabricated scintillation detector, comprising a channel structure (26) for containing a liquid scintillator material therein and flowing said liquid scintillator material therethrough. The channel structure (26) comprises first and second sets (30, 36) of adjacent channel portions (32, 38) arranged in first and second layers (34, 40) and in fluid communication with each other. The second set (36) of adjacent channel portions (38) is directed at right angles with respect to the first set (30) of adjacent channel portions (32). The first and second layers (34, 40) are stacked on top of each other with a separation layer (42) in between, integrally connecting said first and second layers (34, 40). The channel structure (26) simultaneously forms a light guiding structure for guiding scintillation light (52) towards a longitudinal end of the corresponding channel portion (32, 38). The scintillation detector (24) further comprises a plurality of photo detectors (54), arranged such as to receive said scintillation light (50).
Abstract:
A radiation detection apparatus can include a semi-cylindrical radiation sensor having a corresponding radiation sensing region, and a photosensor that is optically coupled to the radiation sensor.
Abstract:
A radiation or neutron detector wherein lateral side light detecting optical fibers prepared from clear optical fibers that are scraped on a lateral side to permit side incidence of fluorescence are used to detect the fluorescence from a phosphor or a scintillator such that the background to gamma-rays is reduced. If desired, the optical fibers may be bent at 90 degrees and guided to a photomultiplier tube in order to reduce the size of the detector. Fabrication and maintenance of the detector can be facilitated by adopting such a design that a detecting block comprising a detection medium and lateral side light detecting optical fibers is separated from a readout block comprising clear optical fibers.
Abstract:
Systems and methods for the simultaneous detection and identification of radiation species, including neutrons, gammas/x-rays and minimum ionizing particles (MIPs). A plurality of rectangular and/or triangularly shaped radiation sensitive scintillators can be configured from a plurality of nano-sized particles, dopants and an extruded plastic material. A wavelength-shifting fiber can then be located within a central hole of each extruded scintillator, wherein the wavelength-shifting fiber absorbs scintillation light and re-emits the light at a longer wavelength, thereby piping the light to a photodetector whose response to the light indicates the presence of radiation The resulting method and system can simultaneously detect neutrons, gamma rays, x-rays and cosmic rays (MIPs) and identify each.
Abstract:
A radiation detector for detecting radiation comprises a scintillator, a first light guide, a plurality of second light guides and a photo detector. The scintillator generates a scintillated light in response to received radiation. The first light guide, which is connected to the scintillator, has a fluorescence characteristic. The second light guide has a common surface arranged at the opposite side of the surface of the scintillator where radiation is received, and the second light guide has a fluorescence characteristic. The photo detector is connected to the first light guide and the second light guide, and detects a fluorescent light therein.
Abstract:
A radiation induced light wavelength shifter and an apparatus for detecting radiation and transmitting detected signal through an optical fiber are disclosed. A radiation induced light wavelength shifter used in such apparatus comprises a cylindrical scintillator, a fluorescent optical fiber an end of which is inserted into the scintillator, the fluorescent optical fiber extending out of the scintillator, a light shielding member covering the scintillator and the fluorescent optical fiber, and a light reflecting material covering the scintillator.
Abstract:
Disclosed is a proton beam detection device comprising a sensor having optical fiber of an arrangement structure capable of accurately and efficiently detecting proton dose distribution such as bragg peak, spread out bragg peak (SOBP) and symmetry of a therapeutic proton beam emitted in a scattering mode. The proton beam detection device, which detects a proton beam emitted from a proton beam source in a scattering mode, comprises a sensor having a plurality of detection modules including reference optical fiber and detection optical fiber having a length longer than the length of the reference optical fiber, the plurality of detection modules being diagonally arranged in the depth direction along which the proton beam emitted from the proton beam source proceeds.