Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 4890312 | Piezoelectric attenuation tongue system for slit radiography equipment A piezo-electric attenuation tongue system for slit radiography equipment comprises a number of tongues placed next to each other. The tongue system is manufactured by slitting a plate of piezoelectric material from one of the edges but leaving unslit a s... | 12/26/1989 |
| 4880985 | Detached collimator apparatus for radiation therapy A collimator apparatus is disclosed for directing a high energy electron beam from an accelerator through an exit aperture and through a spaced and non-connected collimator tube in juxtaposition with a target area in a patient. The collimator tube is adju... | 11/14/1989 |
| 4875225 | X-ray video system and method for the transillumination of an examination subject An x-ray video system for the transillumination of an examination subject has an x-ray system which generates a transillumination image of a patient using an x-ray beam having a central ray, a diaphragm for gating the x-ray beam which has a number of plat... | 10/17/1989 |
| 4872191 | Cam-controlled automatic dynamic focusing for computed tomography A dynamic focusing device is provided for an X-ray scanner, the device comprising at least one detector module located in a position to receive, be illuminated by, and respond to X-ray. A source of X-rays is movable toward or away from the detector module... | 10/03/1989 |
| 4868844 | Mutileaf collimator for radiotherapy machines In a radiation therapy machine it is desirable to produce irregular radiation field shapes in order to shield critical organs not invaded by the tumor. A multileaf collimator is formed of a multiplicity of heavy metal bar leaves driven relative to frames ... | 09/19/1989 |
| 4857730 | Apparatus and method for local chemical analyses at the surface of solid materials by spectroscopy of X photoelectrons The apparatus for local chemical analyses at the surface of solid materials by spectroscopy of X photoelectrons comprising an ultravacuum analysis chamber 1 wherein is housed the sample to be analyzed 2 which is connected to a manipulator 3 located outsid... | 08/15/1989 |
| 4856041 | X-ray detector system An x-ray detector system has a detector element disposed at the end of a channel formed by spaced collimator plates. The thickness of each collimator plate projected onto the detector element increases along the length of the collimator plates in the dire... | 08/08/1989 |
| 4856042 | Diaphragm for electromagnet radiation beam and its use in a collimation device for this beam The diaphragm comprises at least one chamber in which there flows a deformable material that attenuates the radiation beam, the chamber being shaped so that the attenuating material can be introduced from outside the chamber and so that it can surround th... | 08/08/1989 |
| 4856043 | Two piece ceramic Soller slit collimator for X-ray collimation A Soller slit and method of producing a Soller slit by forming a plurality of grooves in two identical ceramic blocks. The two blocks are then bound together with parallel blades of each block facing each other. The ceramic blocks can contain lead titanat... | 08/08/1989 |
| 4852135 | Multichannel x-ray spectrometer A multichannel X-ray spectrometer includes an X-ray tube with a transmission target and a holder for a specimen placed opposite the target, and spectrometric channels arranged around the specimen. These spectrometric channels include, successively arrange... | 07/25/1989 |
| 4852141 | Portable X-ray collimator and scatter shield A shielding apparatus for use in conjunction with an X-ray generator is disclosed. The apparatus comprises a shielding cone extending from the X-ray generator toward the object to be X-rayed, said cone comprising an upper cone portion detachably connected... | 07/25/1989 |
| 4837796 | X-ray imaging system An X-ray imaging system has an X-ray source, an X-ray image detection section, an X-ray mask member, a drive unit, a memory, a calculating section, and an image output unit. An X-ray image is detected by the X-ray image detection section. The X-ray mask m... | 06/06/1989 |
| 4827491 | Radiosurgical collimator knife Apparatus for treatment by radiation of an intracranial portion disposed at a predetermined region, comprises a linear accelerator for supplying a source of energetic electrons, and a collimator disposed adjacent the predetermined region for supplying an ... | 05/02/1989 |
| 4825454 | Tomographic imaging with concentric conical collimator An X-ray imaging apparatus comprising an X-ray source, a collimator, and an X-ray scatter detector. The X-rays are directed toward an object to be imaged where the collimator and detector are located between the source and object. The X-rays striking the ... | 04/25/1989 |
| 4788699 | Dental x-ray diagnostics installation for producing panorama tomograms of the jaw of a patient A dental X-ray diagnostic installation for producing panoramic tomograms of the jaw of a patient is provided with a multiple diaphragm part having a plurality of different diaphragm apertures which can be adjusted to be positioned into a beam path from th... | 11/29/1988 |
| 4780903 | X-ray source An X-ray source includes a thin film X-ray target for generating and focusing X-rays in response to the application of electron beams, and a capillary tubular element for allowing the X-rays to pass. The capillary tubular element has such a diameter the b... | 10/25/1988 |
| 4769829 | CT scanner and detector therefor A CT scanner comprises a rotatable gantry 1 carrying an X-ray source 3 which provides a fan-shaped beam of X-rays and an X-ray detector 10 which scans the X-ray intensity along a line in the plain of the beam. The gantry is rotatable about an axis A relat... | 09/06/1988 |
| 4761802 | High-contrast X-ray image detecting apparatus An X-ray image detecting apparatus devised so as to project an X-ray image of an object on a image receiving plane made of two-dimensionally arrayed picture elements with the object irradiated by many thin scanning X-ray beams. The beams, which penetrate ... | 08/02/1988 |
| 4750196 | Device for examining a body by means of gamma rays or X-rays The invention relates to a device for examining a body by means of gamma rays or X-rays, in which a body to be examined is irradiated by a plurality of primary beams having a comparatively small cross-section. The scattered radiation produced is intercept... | 06/07/1988 |
| 4741012 | Apparatus for slit radiography An apparatus for slit radiography which comprises an X-ray source and a slit diaphragm through which a body to be examined can be scanned by a planar X-ray fan beam. The slit diaphragm is operatively associated with a plurality of juxtaposed tongue-shaped... | 04/26/1988 |
| 4731807 | X-ray examination apparatus The present invention concerns an X-ray examination apparatus allowing to produce images of an object through the scanning of the object by at least two fan-shaped beams having different energy spectra, and obtained from a single X-ray source, thereby all... | 03/15/1988 |
| 4727562 | Measurement of scatter in x-ray imaging A scatter radiation compensation method for use in a medical diagnosis x-ray imaging system employs the use of an attenuating material placed in an x-ray beam to attenuate a portion of the beam such that the in-line component of the beam is reduced in the... | 02/23/1988 |
| 4725734 | Radiation-detecting device for computed tomography A radiation-detecting device for computed tomography, wherein a plurality of scintillation elements are linearly arranged with a collimator plate interposed between the respective units thereof; an outermost collimator plate is set outside of each termina... | 02/16/1988 |
| 4715056 | Apparatus for slit radiography An apparatus for slit radiography comprising an X-ray source, an X-ray detector positioned behind a body being irradiated, said detector collecting the radiation passed through the body, and a slit diaphragm placed between the X-ray source and the body be... | 12/22/1987 |
| 4710947 | Collimator for a radiation diagnostics apparatus A collimator for a radiation diagnostics apparatus has two parallel spaced carriers each having a slot therein directed toward the radiation focus in which a collimator plate consisting of radiation absorbing material is inserted. The collimator plate is ... | 12/01/1987 |
| 4707846 | Full spine shielding means A shielding or masking device for use in conjunction with an X-ray radiation generating source comprised of radiopaque material having a vertically oriented opening having a broader portion twice the width of the upper, narrower portion nearer its distal ... | 11/17/1987 |
| 4696024 | Method and apparatus for detecting flaws in single crystal test samples A gamma diffractometer is used for examining or testing samples from the materials flaw aspect. More particularly, single crystal blades of turbo engines are inspected by Roentgen radiation and evaluation of reflections with regard to their half peak widt... | 09/22/1987 |
| 4688242 | X-ray imaging system An X-ray imaging system has an X-ray source, an X-ray image detection section, an X-ray mask member, a drive unit, a memory, a calculating section, and an image output unit. An X-ray image is detected by the X-ray image detection section. The X-ray mask m... | 08/18/1987 |
| 4677652 | Apparatus for slit radiography There is disclosed an improved control circuit for a slit radiographic apparatus wherein the slit radiographic apparatus is comprised of an X-ray source adapted to scan a body to be radiographed through a slit diaphragm with a planar fan beam wherein the ... | 06/30/1987 |
| 4675893 | Apparatus for slit radiography An apparatus for slit radiography comprising an X-ray source by means of which a body being irradiated can be scanned through a slit diaphragm by a substantially planar, fan-shaped X-ray beam, the scanning X-ray beam passed through the body impinging upon... | 06/23/1987 |
| 4670894 | X-ray source employing cold cathode gas discharge tube with collimated beam An X-ray tube has a wide area cold cathode with a graphite felt surface which faces and is spaced from a wide area anode of high atomic number material. A grid is interposed between the two and the anode, grid and cathode are enclosed in an envelope which... | 06/02/1987 |
| 4663531 | Mechanism to mount a collimator to a radiation detector of a nuclear medicine diagnostic apparatus Mounting pins having a head portion are provided on the detector member of a nuclear medicine diagnostic apparatus while a coupling mechanism associated with a collimator is registrable with the mounting pin. The coupling mechanism includes an entrance ap... | 05/05/1987 |
| 4641335 | Primary-beam collimator for stereo radiographic x-ray diagnostic apparatus A primary-beam collimator for a stereo radiographic x-ray diagnostic installation has an x-ray tube with dual focal points (F1, F2) arranged at a distance from each other. Shutter leaves (1a, 1b, 2a, 2b, 3a, 3b, 4a, 4b) are provided, and adjustable so tha... | 02/03/1987 |
| 4638499 | High resolution collimator system for X-ray detector High resolution in an X-ray computerized tomography (CT) inspection system is achieved by using a collimator/detector combination to limit the beam width of the X-ray beam incident on a detector element to the desired resolution width. In a detector such ... | 01/20/1987 |
| 4629893 | Device for detachably securing a collimator to a radiation detector A device for detachably securing a collimator to a radiation detector, comprising a first and second annular grooves secured to the radiation detector and the collimator respectively, a split ring having a first and second ring ends and being received in ... | 12/16/1986 |
| 4590658 | Tube wall thickness measurement A method and apparatus for measuring the thickness of the wall of a tubular object includes a measurement of the intensity of a radiation beam passing through the walls and quantizing the indicated value of radiation detected by a detector with reference ... | 05/27/1986 |
| 4582999 | Thermal neutron collimator In a system for generating thermal (14 MeV) neutrons containing an ionic accelerator, a novel thermal neutron collimator for producing a beam of collimated thermal neutrons is disclosed. The apparatus includes a substantially hollow collimator tube (10) h... | 04/15/1986 |
| 4563582 | Positron emission tomography camera A positron emission tomography camera having a plurality of detector rings positioned side-by-side or offset by one-half of the detector cross section around a patient area to detect radiation therefrom. Each ring contains a plurality of scintillation det... | 01/07/1986 |
| 4554676 | Dental aiming device Dental aiming device permits periapical and bitewing exposures of the entire dentition without subjecting the patient to unnecessary radiation.... | 11/19/1985 |
| 4549307 | X-Ray imaging system having radiation scatter compensation and method The image signal in a radiation imaging system is improved by establishing a scattered radiation signal and subtracting the scatter radiation signal from the detected radiation signal. The scatter radiation signal is established by shielding portions of t... | 10/22/1985 |
