GB1332370A - Device for x-ray spectrophotometry - Google Patents
Device for x-ray spectrophotometryInfo
- Publication number
- GB1332370A GB1332370A GB1512471A GB1512471A GB1332370A GB 1332370 A GB1332370 A GB 1332370A GB 1512471 A GB1512471 A GB 1512471A GB 1512471 A GB1512471 A GB 1512471A GB 1332370 A GB1332370 A GB 1332370A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ray
- high voltage
- detector
- tube
- wedges
- 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
- 238000002798 spectrophotometry method Methods 0.000 title 1
- 210000000988 bone and bone Anatomy 0.000 abstract 4
- 150000003839 salts Chemical class 0.000 abstract 3
- 210000004872 soft tissue Anatomy 0.000 abstract 3
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 abstract 2
- 229910052772 Samarium Inorganic materials 0.000 abstract 2
- 229910052776 Thorium Inorganic materials 0.000 abstract 2
- 239000006096 absorbing agent Substances 0.000 abstract 2
- 239000000470 constituent Substances 0.000 abstract 2
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000009499 grossing Methods 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4035—Arrangements for generating radiation specially adapted for radiation diagnosis the source being combined with a filter or grating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/482—Diagnostic techniques involving multiple energy imaging
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/58—Switching arrangements for changing-over from one mode of operation to another, e.g. from radioscopy to radiography, from radioscopy to irradiation or from one tube voltage to another
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
- A61B6/505—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of bone
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Optics & Photonics (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
1332370 X-ray spectrometer MEDINOVA A B 14 May 1971[21 May 1970] 15124/71 Heading G1A [Also in Division H5] An X-ray spectrometer for measuring more than one constituent in a sample comprises an X-ray tube supplied with a high voltage cyclically varying between two levels to provide emission at two different, alternating wavelengths and a filter system arranged to switch in filters in synchronism with the high voltage variation to define more accurately the separate wavelengths. The apparatus of Fig. 1 is suitable for the determination of bone salts and soft parts in a part of the body 5 which may be inserted in the measuring beam. The tube 2 is supplied with a high voltage comprising a pulsating component superposed on a substantially constant D. C. level via transformers and smoothing circuits etc. 1. The tube has a water cooled tungsten target which omits X-ray radiation at an energy proportional to the applied voltage. The emission from the tube is arranged to provide a measuring beam towards detector 6 and a reference beam for compensating for fluctuations in X-ray source intensity to detector 6a. In the path of both beams is the filter system comprising a rotary sector disc having two opposite sectors of thorium and two of samarium. The rotation of the disc is monitored by electrooptical arrangement 3 and is arranged to synchronize the thorium filter with the high voltage part and the samarium with the low constant part of the X-ray supply waveform. In operation, without the test body 5 in position, the positions of wedges 4a, 4b of simulated bone salts and soft tissue, respectively are adjusted to equalize the intensities of the two different alternate energies in the measuring beam, and also to equalize them with the intensity in the reference beam. Bone salts absorbers 7, 4e and soft tissue absorbers 7a, 4f are provided to aid thus calibration. On insertion of the test body, the output of detector 6 changes for both energies. The detector output corresponding to bone is channelled by gating circuits 8 to a first differencing circuit (with the corresponding reference channel signal) and that corresponding to soft tissue to a second differencing circuit, Fig.3 (not shown). The signals comprise pulses which are rendered all of equal amplitude, the pulse rates being representative of intensity (effectively the number of pulses detected during each half cycle). These digital differences are converted by D/A converters to supply motors 4c, 4d to drive the wedges 4a, 4b to balance the intensities once more. The necessary displacements of respective wedges represent the amounts of the respective constituents.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE696470A SE339727B (en) | 1970-05-21 | 1970-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1332370A true GB1332370A (en) | 1973-10-03 |
Family
ID=20270032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1512471A Expired GB1332370A (en) | 1970-05-21 | 1971-05-14 | Device for x-ray spectrophotometry |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE767458A (en) |
| CA (1) | CA926525A (en) |
| DE (1) | DE2124278A1 (en) |
| FR (1) | FR2091819A5 (en) |
| GB (1) | GB1332370A (en) |
| IT (1) | IT942104B (en) |
| NL (1) | NL7106906A (en) |
| SE (1) | SE339727B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2409269A (en) * | 2000-08-03 | 2005-06-22 | Cambridge Imaging Ltd | X-ray inspection and material discrimination |
| GB2438278A (en) * | 2006-05-19 | 2007-11-21 | Univ Tsinghua | Energy spectrum modulation and image processing method |
| US7502442B2 (en) | 2002-01-28 | 2009-03-10 | Smiths Heimann Gmbh | X-ray inspection system and method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2312030A1 (en) * | 1975-05-23 | 1976-12-17 | Radiologie Cie Gle | X-ray measurement of density - is for two-component materials and uses compensating material in special screen |
| EP0157129A1 (en) * | 1984-02-21 | 1985-10-09 | Siemens Aktiengesellschaft | Electron accelerator |
-
1970
- 1970-05-21 SE SE696470A patent/SE339727B/xx unknown
-
1971
- 1971-05-14 GB GB1512471A patent/GB1332370A/en not_active Expired
- 1971-05-15 DE DE19712124278 patent/DE2124278A1/en active Pending
- 1971-05-19 NL NL7106906A patent/NL7106906A/xx unknown
- 1971-05-19 IT IT5044471A patent/IT942104B/en active
- 1971-05-19 CA CA113399A patent/CA926525A/en not_active Expired
- 1971-05-19 FR FR7118288A patent/FR2091819A5/fr not_active Expired
- 1971-05-21 BE BE767458A patent/BE767458A/en unknown
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2409269A (en) * | 2000-08-03 | 2005-06-22 | Cambridge Imaging Ltd | X-ray inspection and material discrimination |
| GB2409269B (en) * | 2000-08-03 | 2005-09-21 | Cambridge Imaging Ltd | Improvements in and relating to material identification using x-rays |
| US7502442B2 (en) | 2002-01-28 | 2009-03-10 | Smiths Heimann Gmbh | X-ray inspection system and method |
| GB2438278A (en) * | 2006-05-19 | 2007-11-21 | Univ Tsinghua | Energy spectrum modulation and image processing method |
| GB2438278B (en) * | 2006-05-19 | 2009-12-30 | Univ Tsinghua | Energy spectrum modulation apparatus, material discrimination method and device, and image processing method. |
| AU2007252162B2 (en) * | 2006-05-19 | 2011-03-03 | Nuctech Company Limited | Energy spectra modulating device,method and device of identifying materials and method of image processing |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2091819A5 (en) | 1972-01-14 |
| BE767458A (en) | 1971-10-18 |
| NL7106906A (en) | 1971-11-23 |
| IT942104B (en) | 1973-03-20 |
| DE2124278A1 (en) | 1971-12-30 |
| CA926525A (en) | 1973-05-15 |
| SE339727B (en) | 1971-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |