GB802754A - Improvements relating to x-ray apparatus - Google Patents
Improvements relating to x-ray apparatusInfo
- Publication number
- GB802754A GB802754A GB1354956A GB1354956A GB802754A GB 802754 A GB802754 A GB 802754A GB 1354956 A GB1354956 A GB 1354956A GB 1354956 A GB1354956 A GB 1354956A GB 802754 A GB802754 A GB 802754A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- motor
- frame
- ray
- cam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
- G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
802,754. X-ray apparatus. PICKER XRAY CORPORATION WAITE MANUFACTURING DIVISION, Inc. May 2, 1956, No. 13549/56. Class 98(1) In X-ray apparatus having a grid mounted for movement with respect to an X- ray tube, an electric synchronous motor is connected to the source of A.C. supply for the X-ray tube, and mechanism driven by the motor for reciprocating the grid during X-ray exposure includes a gridengaging cam co-acting with the grid to provide a grid speed that is non-synchronous with respect to the frequency of the supply throughout the grid movement. As shown in Fig. 3, a frame 20 is slidable along rails 16, 17 mounted longitudinally below an X-ray table. The side walls 14, 18 of the frame have bottom flanges 23 slidably supporting a plate 30 carrying an X-ray cassette 35 in clips 36. The table has a slot along its side, through which the plate 30 may be pulled out to change the cassette. A Bucky grid 40 is supported above the plate 30 in a frame 41, Fig. 5, which is supported at one side by rollers 42 engaging flanges on the wall 18 of frame 20, and at the other side by brackets 43 sliding on rods 45, 46 mounted in brackets on the wall 14 of frame 20. The grid is movable to and fro by means of a heartshaped cam 52, Fig. 6, driven through gearing from an electric synchronous motor 60 and engaging rollers 51 on a bar 50 connected to one of the brackets 43. The grid - reciprocating mechanism is mounted on wall 14 of frame 20 and enclosed by a removable housing 70. If the exposures are long enough to include several strokes of the grid, the phase of grid movement at which the exposure is initiated does not matter and all that is needed is a switch for the motor 60 and an exposure-controlling switch, or a common switch for both. When the apparatus is to be used for shorter exposures, a pair of cams are mounted on the shaft of cam 52, and these cams operate switches connected in an electric circuit in such a way that an exposure cannot be made at the time when the grid is reversing. The X- ray tube is connected to the same source of alternating current as the motor, and the gearing between the motor and the cam is preferably so designed that the grid moves through a distance covering ten of its slats during thirteen cycles of the alternating current, though other relationships which avoid grid shadow are permissible. Any change in the alternating current frequency affects the motor speed, so that the relation of the grid speed to the current cycle remains constant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1354956A GB802754A (en) | 1956-05-02 | 1956-05-02 | Improvements relating to x-ray apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1354956A GB802754A (en) | 1956-05-02 | 1956-05-02 | Improvements relating to x-ray apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB802754A true GB802754A (en) | 1958-10-08 |
Family
ID=10024956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1354956A Expired GB802754A (en) | 1956-05-02 | 1956-05-02 | Improvements relating to x-ray apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB802754A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0114978A1 (en) * | 1982-12-03 | 1984-08-08 | Fuji Photo Film Co., Ltd. | High-speed image recording apparatus using stimulable phosphor sheets |
EP1943950A1 (en) * | 2007-01-09 | 2008-07-16 | General Electric Company | X-ray detector arrangement |
DE102010037605B4 (en) | 2009-09-18 | 2021-07-15 | General Electric Co. | X-ray detector unit with a device for reducing the detection of scattered X-rays |
-
1956
- 1956-05-02 GB GB1354956A patent/GB802754A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0114978A1 (en) * | 1982-12-03 | 1984-08-08 | Fuji Photo Film Co., Ltd. | High-speed image recording apparatus using stimulable phosphor sheets |
EP1943950A1 (en) * | 2007-01-09 | 2008-07-16 | General Electric Company | X-ray detector arrangement |
DE102010037605B4 (en) | 2009-09-18 | 2021-07-15 | General Electric Co. | X-ray detector unit with a device for reducing the detection of scattered X-rays |
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