US4312357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transillumination diagnostic method and apparatus
Assignee: SINUS MEDICAL EQUIPMENT AB
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Filing: 1979-12-17
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Granted: 1982-01-26
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Expires: 1999-12-17
Abstract
Abstract An instrument for indicating anomalies in human tissue comprises first and second light emitters. The first light emitter comprises a tungsten filament which transilluminates the tissue and visually indicates any anomalies therein. The second light emitter emits a light of higher intensity than the light from the first emitter. The second emitter is actuated while the tissue is being transilluminated by the first light emitter to make an exposure on infrared sensitive film located at an opposite side of the tissue.
Inventors
- 👤 Torsten Andersson
- 👤 Bjorn Ohlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/0059; A61B5/0082; A61B5/0091; A61B5/43; A61B5/4306; A61B5/4312
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A method of in situ differentially diagnosing pathological changes in human body tissue, comprising the steps of: directing towards one side of the body tissue a shielded light transmitting instrument; actuating a first low intensity light emitter in said instrument which comprises a tungsten filament, and which emits light from within the blue to within the infrared spectrum, which transilluminates the body tissue and visually indicates the presence of any anomalies in the tissue, arranging infrared sensitive film at the opposite side of the body tissue, and actuating a second light emitter emitting light from within the blue to within the infrared spectrum in said instrument to emit a second light of higher intensity than the light from said first emitter whereby light passing through the tissues makes an exposure on said infrared sensitive film.
Claim 2
Independent Claim
135 words
A method of in situ differentially diagnosing pathological changes in human body tissue, comprising the steps of: directing towards one side of the body tissue a shielded light transmitting instrument; actuating a first low intensity light emitter in said instrument which comprises a tungsten filament, and which emits light from within the blue to within the infrared spectrum, which transilluminates the body tissue and visually indicates the presence of any anomalies in the tissue, arranging infrared sensitive film at the opposite side of the body tissue, and actuating a second light emitter emitting light from within the blue to within the infrared spectrum in said instrument to emit a second light of higher intensity than the light from said first emitter whereby light passing through the tissues makes an exposure on said infrared sensitive film.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein said step of actuating a second light emitter comprises the step of actuating a flash lamp.
Claim 4
Dependent Claim
139 words
An instrument in combination with infrared sensitive film for detecting pathological changes in human body tissue, comprising: a shielded light transmitting member having one end suitable for application against one side of human body tissue being examined, a low-intensity light source emitting light from within the blue to within the infrared spectrum and located at the other end of said transmitter member and comprising: a first light emitter comprising a tungsten filament for emitting a diffuse light which transilluminates the body tissue and visually indicates the presence of any anomalies in the tissue, and a second light emitter for emitting a second light from within the blue to within the infrared spectrum of higher intensity than the light from said first emitter, for making an exposure on the infrared sensitive film located at the opposite side of the tissue.
Claim 5
Dependent Claim
139 words
An instrument in combination with infrared sensitive film for detecting pathological changes in human body tissue, comprising: a shielded light transmitting member having one end suitable for application against one side of human body tissue being examined, a low-intensity light source emitting light from within the blue to within the infrared spectrum and located at the other end of said transmitter member and comprising: a first light emitter comprising a tungsten filament for emitting a diffuse light which transilluminates the body tissue and visually indicates the presence of any anomalies in the tissue, and a second light emitter for emitting a second light from within the blue to within the infrared spectrum of higher intensity than the light from said first emitter, for making an exposure on the infrared sensitive film located at the opposite side of the tissue.
Claim 6
Dependent Claim
15 words
An instrument according to claim 3 wherein said second light emitter comprises a flash lamp.
Claim 7
Dependent Claim
19 words
A method according to claim 1, wherein said film is spaced from said tissue when the exposure is made.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |