GB1324922A - Bone mineral analyzer - Google Patents
Bone mineral analyzerInfo
- Publication number
- GB1324922A GB1324922A GB4973971A GB4973971A GB1324922A GB 1324922 A GB1324922 A GB 1324922A GB 4973971 A GB4973971 A GB 4973971A GB 4973971 A GB4973971 A GB 4973971A GB 1324922 A GB1324922 A GB 1324922A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bone
- tissue
- fluid
- scan
- capacitor
- 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
- 210000000988 bone and bone Anatomy 0.000 title abstract 11
- 229910052500 inorganic mineral Inorganic materials 0.000 title abstract 3
- 239000011707 mineral Substances 0.000 title abstract 3
- 210000001519 tissue Anatomy 0.000 abstract 4
- 238000010521 absorption reaction Methods 0.000 abstract 3
- 239000003990 capacitor Substances 0.000 abstract 3
- 239000012530 fluid Substances 0.000 abstract 3
- 238000005259 measurement Methods 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 230000002285 radioactive effect Effects 0.000 abstract 1
- 230000002441 reversible effect Effects 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
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4208—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
- A61B6/4258—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector for detecting non x-ray radiation, e.g. gamma radiation
-
- 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)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Veterinary Medicine (AREA)
- Radiology & Medical Imaging (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- High Energy & Nuclear Physics (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (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
1324922 Radiation absorption bone measurement NORLAND CORP 26 Oct 1971 [26 Oct 1970] 49739/71 Heading G1A In an apparatus for the determination of the mineral content of bone and associated tissue by the absorption of Y rays in which the part to be measured is enclosed in fluid having the same absorption as the tissue and the measurement is obtained by a comparison of a reading known to be obtained solely from tissue and fluid with one from bone, tissue, and fluid. The enclosure is scanned by a collimated beam from a radio active source in a programmed manner whereby in response to the actuation of start button 42, Fig. 1, motor 14 causes the arm 13 carrying source 19 and sensor 21, 22 to move in its scan at a fast speed until the detector signal level indicates that the beam has encountered bone 17, 18; the motor reverses and backs off the beam a predetermined distance from the bone, and a referencing or zeroing reading is taken and stored in a capacitor; the forward scan is recommenced at a slower rate and a logarithm signal using the stored tissue-liquid measurement as a reference is derived from a comparator and log converter and integrated to indicate on a digital meter the mineral content. A number of scans may be averaged and a separate beam may be used for locating the edge of the bone. In the case where the beam may be called upon to scan two laterally spaced bones means may be provided whereby a desired one is measured. The scanning is terminated by the departure of the beam from the trailing edge of the bone and two pulses resulting from the leading and trailing edge may be used to measure the distance across the bone. The drive includes reversible clutch mechanism and interlock protection against false movement. The integrating capacitor is precharged to approximately the reference value during the forward bone search. Alternatively the steps may be controlled individually by push buttons, and/or the measure and reference signals may be separately integrated and subtracted. The time constant of the capacitor may be made to differ during approach and measuring.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8394470A | 1970-10-26 | 1970-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1324922A true GB1324922A (en) | 1973-07-25 |
Family
ID=22181664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4973971A Expired GB1324922A (en) | 1970-10-26 | 1971-10-26 | Bone mineral analyzer |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3715588A (en) |
| CA (1) | CA959579A (en) |
| DE (1) | DE2153298A1 (en) |
| FR (1) | FR2113265A5 (en) |
| GB (1) | GB1324922A (en) |
| IT (1) | IT942237B (en) |
| NL (1) | NL174874C (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1430088A (en) * | 1972-05-17 | 1976-03-31 | Emi Ltd | Radiography |
| US3867634A (en) * | 1968-08-23 | 1975-02-18 | Emi Ltd | Body portion support for use with penetrating radiation examination apparatus |
| US4206361A (en) * | 1972-05-17 | 1980-06-03 | E M I Limited | Radiography |
| US3965357A (en) * | 1974-03-01 | 1976-06-22 | Emi Patents Limited | Apparatus for examining a body by means of penetrating radiation |
| DE2412658C3 (en) * | 1974-03-15 | 1982-07-22 | EMI Ltd.,, Hayes, Middlesex | Device for examining a body by means of rays penetrating the body |
| US3996471A (en) * | 1975-03-11 | 1976-12-07 | Nasa | Method and system for in vivo measurement of bone tissue using a two level energy source |
| US4341956A (en) * | 1979-09-24 | 1982-07-27 | Pfizer, Inc. | Apparatus and method for compensating the dark current photoelectric transducers |
| JPS59221643A (en) * | 1983-05-31 | 1984-12-13 | Toshiba Corp | Inspecting method of ceramic product |
| US4550255A (en) * | 1983-07-05 | 1985-10-29 | The United States Of America As Represented By The Secretary Of The Air Force | Void detection and composition measurements in composite wires |
| JPS61109557A (en) * | 1984-11-02 | 1986-05-28 | 帝人株式会社 | Evaluation of bone |
| JPS62110141A (en) * | 1985-11-08 | 1987-05-21 | Hamamatsu Photonics Kk | Apparatus for measuring density of matter low in transmissivity |
| US4882494A (en) * | 1988-02-26 | 1989-11-21 | Michael D. Duncan | Apparatus and method for flooding a nuclear imaging device with radiation from an imaging source |
| US5005196A (en) * | 1989-03-10 | 1991-04-02 | Expert Image Systems, Inc. | Limb positioning and calibration apparatus for radiographic imaging |
| US4956859A (en) * | 1989-03-10 | 1990-09-11 | Expert Image Systems, Inc. | Source filter for radiographic imaging |
| US5005195A (en) * | 1989-03-10 | 1991-04-02 | Expert Image Systems, Inc. | Digital readout system for radiographic imaging |
| US5090040A (en) * | 1989-03-10 | 1992-02-18 | Expert Image Systems, Inc. | Data acquisition system for radiographic imaging |
| DE69033232T2 (en) * | 1989-12-14 | 1999-12-30 | Aloka Co. Ltd., Mitaka | Device for measuring the calcium content of bones |
| US6217214B1 (en) | 1993-11-22 | 2001-04-17 | Hologic, Inc. | X-ray bone densitometry apparatus |
| US5687211A (en) * | 1993-11-22 | 1997-11-11 | Hologic, Inc. | Bone densitometry scanning system and method for selecting scan parametric values using x-ray thickness measurement |
| CA2184237A1 (en) * | 1995-09-08 | 1997-03-09 | Jay A. Stein | X-ray bone densitometry |
| US10188861B2 (en) * | 2016-03-29 | 2019-01-29 | Warsaw Orthopedic, Inc. | Bioabsorbable or partially-bioabsorbable bone growth stimulator system and method for manufacturing a bioabsorbable or partially-bioabsorbable bone-regeneration stimulator system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3344275A (en) * | 1967-09-26 | Step - by- step | ||
| US3057998A (en) * | 1956-10-23 | 1962-10-09 | Univ Baylor | Scanning device and method |
| US2992332A (en) * | 1956-10-31 | 1961-07-11 | John J Madigan | Method and apparatus for determining the quantitative relationship of components in products by measurement of gamma ray penetration thereof |
-
1970
- 1970-10-26 US US00083944A patent/US3715588A/en not_active Expired - Lifetime
-
1971
- 1971-10-25 CA CA125,983A patent/CA959579A/en not_active Expired
- 1971-10-26 IT IT53709/71A patent/IT942237B/en active
- 1971-10-26 DE DE19712153298 patent/DE2153298A1/en active Pending
- 1971-10-26 NL NLAANVRAGE7114746,A patent/NL174874C/en not_active IP Right Cessation
- 1971-10-26 GB GB4973971A patent/GB1324922A/en not_active Expired
- 1971-10-26 FR FR7138445A patent/FR2113265A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2153298A1 (en) | 1972-04-27 |
| IT942237B (en) | 1973-03-20 |
| NL174874B (en) | 1984-03-16 |
| US3715588A (en) | 1973-02-06 |
| FR2113265A5 (en) | 1972-06-23 |
| NL7114746A (en) | 1972-04-28 |
| NL174874C (en) | 1984-08-16 |
| CA959579A (en) | 1974-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |