JPS57131087A - Simultaneous counter in positron ct system - Google Patents
Simultaneous counter in positron ct systemInfo
- Publication number
- JPS57131087A JPS57131087A JP56015071A JP1507181A JPS57131087A JP S57131087 A JPS57131087 A JP S57131087A JP 56015071 A JP56015071 A JP 56015071A JP 1507181 A JP1507181 A JP 1507181A JP S57131087 A JPS57131087 A JP S57131087A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- detectors
- gates
- group
- 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.)
- Granted
Links
- 230000002401 inhibitory effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01T1/2914—Measurement of spatial distribution of radiation
- G01T1/2985—In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis)
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
- Measurement Of Radiation (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Nuclear Medicine (AREA)
Abstract
PURPOSE:To remove false data correctly when the simultaneous events occur in detectors in a group, by detecting said simultaneous events by a logic circuit, and inhibiting the output of the timing signals from the detectors in the group. CONSTITUTION:The outputs of four detectors 10-13 in the same group 1 are inputted into an address encoder 3, an OR gate 5, and a mutiple simultaneous events checking circuit 2. A flip flop 6 receives the output of the OR gate 5 at a clock input CK and the output of the check circuit 2 at a data input DI. The address encoder 3 receives four inputs which are the output signals A-D, and forms the addresses corresponding to said inputs. A latch circuit 4 latches the output addresses from addres encoder 3. A reset circuit 7 resets the flip flop 6. The check circuit 2 is constituted by exclusive NOR gates 20 and 22, OR gates 21, 23, and 26, and NOR gates 24 and 25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56015071A JPS57131087A (en) | 1981-02-05 | 1981-02-05 | Simultaneous counter in positron ct system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56015071A JPS57131087A (en) | 1981-02-05 | 1981-02-05 | Simultaneous counter in positron ct system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57131087A true JPS57131087A (en) | 1982-08-13 |
| JPS6137583B2 JPS6137583B2 (en) | 1986-08-25 |
Family
ID=11878614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56015071A Granted JPS57131087A (en) | 1981-02-05 | 1981-02-05 | Simultaneous counter in positron ct system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57131087A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001356172A (en) * | 1999-08-18 | 2001-12-26 | Marconi Medical Systems Inc | Positron imaging |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01173190A (en) * | 1987-12-26 | 1989-07-07 | Ootomatsuku C-Rusu:Kk | Article delivering device |
-
1981
- 1981-02-05 JP JP56015071A patent/JPS57131087A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001356172A (en) * | 1999-08-18 | 2001-12-26 | Marconi Medical Systems Inc | Positron imaging |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6137583B2 (en) | 1986-08-25 |
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