Patent FR1031609A successfully refreshed from Google Patents.
US3769508A
Expired / Lapsed
US
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Automatic dot factor system for a scintillation device and method of operation
Assignee: Philips Nuclear Medicine Inc
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Filing: 1972-06-23
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Granted: 1973-10-30
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Expires: 1992-06-23
Abstract
Abstract A scintillation scanner having a dot factor system for automatically spacing the dots which are printed by a color printer representative of radiation activity. The dot factor system utilizes circuitry for counting the number of signals which occur at a calibration point or ''''hot spot'''' for a predetermined number of intervals of time and then dividing the number of counted signals by the number of intervals of time to develop a calibrate signal having a high degree of statistical accuracy. The calibrate signal is then applied to a decoding and divider network for dividing the number of counts representative of radiation activity by a factor which is dependent upon the number of counts which occur at the calibration point to thereby provide optimum spacing between the printed dots for a given study.
Inventors
- 👤 C Brunnett
- 👤 B Ioannou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:18
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/161; G01T1/164; G01T1/166; G01T1/1663; G01T1/1666
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
159 words
In a scintillation system, a radiation detector including circuitry for developing a train of electrical pulses representative of the value of radiation activity measured by the detector, the improvement comprising: counting circuit means coupled to said detector circuitry for developing a calibrate signal having a value representative of the number of electrical pulses received during a predetermined interval of time; dot factor circuit means coupled to said counting circuit means and to said detector circuitry for developing a train of output signals having a value representative of the value of a said train of electrical pulses developed by said detector circuitry divided by a factor having a value representative of the value of a said calibrate signal; and, recording means coupled to said dot factor circuit means for providing an output presentation which takes the form of a pattern of discrete dots representative of the valves of said output signals to provide a visual representation of measured radiation activity.
Claim 2
Dependent Claim
159 words
In a scintillation system, a radiation detector including circuitry for developing a train of electrical pulses representative of the value of radiation activity measured by the detector, the improvement comprising: counting circuit means coupled to said detector circuitry for developing a calibrate signal having a value representative of the number of electrical pulses received during a predetermined interval of time; dot factor circuit means coupled to said counting circuit means and to said detector circuitry for developing a train of output signals having a value representative of the value of a said train of electrical pulses developed by said detector circuitry divided by a factor having a value representative of the value of a said calibrate signal; and, recording means coupled to said dot factor circuit means for providing an output presentation which takes the form of a pattern of discrete dots representative of the valves of said output signals to provide a visual representation of measured radiation activity.
Claim 3
Dependent Claim
81 words
An apparatus as defined in claim 1, wherein said dot factor circuit means includes gating means, a binary point counter including means for counting a number of predetermined time intervals, and memory circuit means for actuating said gating means to preset said counting circuit means in response to the number of counted time intervals to thereby cause the pattern of calibrate signals developed by said counting circuit means to be representative of the average number of counts per interval of time.
Claim 4
Dependent Claim
32 words
An apparatus as defined in claim 2 wherein said counting circuit means is a binary counter and said gating means includes circuit means for setting the binary point of said binary counter.
Claim 5
Dependent Claim
68 words
An apparatus as defined in claim 2 including a reference storage register coupled to said counting circuit means for storing a pattern of electrical signals representative of the average number of counts per interval of time; and, digital-to-analog circuit means coupled to said reference storage register for converting the pattern of signals stored in said reference storage register to signals of analog form for driving said recording means.
Claim 6
Dependent Claim
168 words
A scintillation system comprising: a radiation detector including circuitry for developing electrical pulses representative of the value of radiation activity measured by the detector; counting circuit means coupled to said detector circuitry for developing a pattern of calibrate signals having a value representative of the number of electrical pulses received during a predetermined interval of time; dot factor circuit means coupled to said counting circuit means for developing a factor signal having a value representative of the value of a said pattern of calibrate signals; divider circuit means coupled to said counting circuit means and to said dot factor circuit means for developing a train of output signals substantially equal to the number of electrical pulses developed by said detector circuitry divided by a said factor signal; and, recording means coupled to said divider circuit for providing an output presentation which takes the form of a pattern of discrete dots representative of the values of said output signals to thereby provide a visual representation of measured radiation activity.
Claim 7
Dependent Claim
168 words
A scintillation system comprising: a radiation detector including circuitry for developing electrical pulses representative of the value of radiation activity measured by the detector; counting circuit means coupled to said detector circuitry for developing a pattern of calibrate signals having a value representative of the number of electrical pulses received during a predetermined interval of time; dot factor circuit means coupled to said counting circuit means for developing a factor signal having a value representative of the value of a said pattern of calibrate signals; divider circuit means coupled to said counting circuit means and to said dot factor circuit means for developing a train of output signals substantially equal to the number of electrical pulses developed by said detector circuitry divided by a said factor signal; and, recording means coupled to said divider circuit for providing an output presentation which takes the form of a pattern of discrete dots representative of the values of said output signals to thereby provide a visual representation of measured radiation activity.
Claim 8
Dependent Claim
81 words
An apparatus as defined in claim 5 wherein said dot factor circuit means includes gating means, a binary point counter inclUding means for counting a number of predetermined time intervals, and memory circuit means for actuating said gating means to preset said counting circuit means in response to the number of counted time intervals to thereby cause the pattern of calibrate signals developed by said counting circuit means to be representative of the average number of counts per interval of time.
Claim 9
Dependent Claim
32 words
An apparatus as defined in claim 6 wherein said counting circuit means is a binary counter and said gating means includes circuit means for setting the binary point of said binary counter.
Claim 10
Dependent Claim
68 words
An apparatus as defined in claim 6 including a reference storage register coupled to said counting circuit means for storing a pattern of electrical signals representative of the average number of counts per interval of time; and, digital-to-analog circuit means coupled to said reference storage register for converting the pattern of signals stored in said reference storage register to signals of analog form for driving said recording means.
Claim 11
Dependent Claim
68 words
An apparatus as defined in claim 7 including a reference storage register coupled to said counting circuit means for storing a pattern of electrical signals representative of the average number of counts per interval of time; and digital-to-analog circuit means coupled to said reference storage register for converting the pattern of signals stored in said reference storage register to signals of analog form for driving said recording means.
Claim 12
Dependent Claim
168 words
A scintillation system comprising: a radiation detector including circuitry for developing electrical pulses representative of the value of radiation activity measured by the detector; counting circuit means coupled to said detector circuitry for developing a pattern of calibrate signals having a value representative of the number of electrical pulses received during a predetermined interval of time; dot factor circuit means coupled to said counting circuit means for developing a factor signal having a value representative of the value of a said pattern of calibrate signals; divider circuit means coupled to said counting circuit means and to said dot factor circuit means for developing a train of output signals substantially equal to the number of electrical pulses developed by said detector circuitry divided by a said factor signal; and, recording means coupled to said divider circuit for providing an output presentation which takes the form of a pattern of discrete dots representative of the values of said output signals to thereby provide a visual representation of measured radiation activity.
Claim 13
Dependent Claim
168 words
A scintillation system comprising: a radiation detector including circuitry for developing electrical pulses representative of the value of radiation activity measured by the detector; counting circuit means coupled to said detector circuitry for developing a pattern of calibrate signals having a value representative of the number of electrical pulses received during a predetermined interval of time; dot factor circuit means coupled to said counting circuit means for developing a factor signal having a value representative of the value of a said pattern of calibrate signals; divider circuit means coupled to said counting circuit means and to said dot factor circuit means for developing a train of output signals substantially equal to the number of electrical pulses developed by said detector circuitry divided by a said factor signal; and, recording means coupled to said divider circuit for providing an output presentation which takes the form of a pattern of discrete dots representative of the values of said output signals to thereby provide a visual representation of measured radiation activity.
Claim 14
Dependent Claim
99 words
An apparatus as defined in claim 10 wherein said divider circuit means includes gating means for setting a binary point of said counting circuit means, a binary point counter including means for counting a number of predetermined time intervals, and memory circuit means for actuating said gating means in said counting circuit means to set the binary point of said counting circuit means in response to the number of counted time intervals, to thereby cause the pattern of calibrate signals developed by said counting circuit means to be representative of the average number of counts per interval of time.
Claim 15
Dependent Claim
32 words
An apparatus as defined in claim 11 wherein said counting circuit means is a binary counter and said gating means includes circuit means for setting the binary point of said binary counter.
Claim 16
Dependent Claim
69 words
An apparatus as defined in claim 11 including a reference storage register coupled to said counting circuit means for storing a pattern of electrical signals representative of the average number of counts per interval of time; and, normalizing circuit means coupled to said reference storge register for developing a said calibrating signal having a value representative of a said pattern of electrical signals stored in said reference storage register.
Claim 17
Independent Claim
127 words
A method of operating a scintillation scanner to automatically optimize the spacing between discrete dots which form a pattern repResentative of measured radiation activity comprising the steps of: developing electrical pulses representative of the value of radiation activity measured by a detector; developing a pattern of calibrate signals having a value representative of the number of electrical pulses received during a predetermined interval of time; developing a factor signal having a value representative of the value of a said pattern of calibrate signals; dividing the number of electrical pulses developed by said detector circuitry by a said factor signal to develop output signals; printing a pattern of discrete dots representative of the values of said output signals to thereby provide a visual representation of measured radiation activity.
Claim 18
Independent Claim
127 words
A method of operating a scintillation scanner to automatically optimize the spacing between discrete dots which form a pattern repResentative of measured radiation activity comprising the steps of: developing electrical pulses representative of the value of radiation activity measured by a detector; developing a pattern of calibrate signals having a value representative of the number of electrical pulses received during a predetermined interval of time; developing a factor signal having a value representative of the value of a said pattern of calibrate signals; dividing the number of electrical pulses developed by said detector circuitry by a said factor signal to develop output signals; printing a pattern of discrete dots representative of the values of said output signals to thereby provide a visual representation of measured radiation activity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |