JPS5499542A - Picture recomposing device and its method - Google Patents
Picture recomposing device and its methodInfo
- Publication number
- JPS5499542A JPS5499542A JP575678A JP575678A JPS5499542A JP S5499542 A JPS5499542 A JP S5499542A JP 575678 A JP575678 A JP 575678A JP 575678 A JP575678 A JP 575678A JP S5499542 A JPS5499542 A JP S5499542A
- Authority
- JP
- Japan
- Prior art keywords
- projection data
- filter function
- picture
- unit
- region
- 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
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000003745 diagnosis Methods 0.000 abstract 1
Landscapes
- Apparatus For Radiation Diagnosis (AREA)
- Image Processing (AREA)
- Medical Treatment And Welfare Office Work (AREA)
Abstract
PURPOSE: To enhance the quality of the recomposed picture by giving the effect of the filter function, featuring the function value which is decided at the frequency region and at the same time approximates to a fixed value except for zero at the region where the frequency absolute value is large, to the projection data.
CONSTITUTION: Filter function H(ω) featuring shape 3 is used. This filter function is closer to the ideal filter function |ω| and approximates to a fixed value at the region where the frequency absolute value is large. Projection data 10 is read out in sequence from memory unit 16 under the control of main control unit 14 and then supplied to correction projection data calculation unit 17. Unit 17 performs correction by giving the effect of filter function (shape 3) to the projection data for memorization 18. Then correction projection data 18 is read to reverse projection calculator 19 to be calculated and stored 20 and then to be displayed 21 or printed out.Thus, the recomposed picture image or the distribution picture of the X-ray absorption coefficient regarding cross-sectional part A is put under diagnosis via display unit 21.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53005756A JPS6013217B2 (en) | 1978-01-24 | 1978-01-24 | Image reconstruction device and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53005756A JPS6013217B2 (en) | 1978-01-24 | 1978-01-24 | Image reconstruction device and method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5499542A true JPS5499542A (en) | 1979-08-06 |
JPS6013217B2 JPS6013217B2 (en) | 1985-04-05 |
Family
ID=11619956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53005756A Expired JPS6013217B2 (en) | 1978-01-24 | 1978-01-24 | Image reconstruction device and method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6013217B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013138802A (en) * | 2012-01-06 | 2013-07-18 | Asahi Roentgen Kogyo Kk | X-ray ct imaging apparatus and image processing method therefor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0212472A (en) * | 1988-06-30 | 1990-01-17 | Yokogawa Medical Syst Ltd | Method and device for reconstituting picture having double-magnification function |
-
1978
- 1978-01-24 JP JP53005756A patent/JPS6013217B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013138802A (en) * | 2012-01-06 | 2013-07-18 | Asahi Roentgen Kogyo Kk | X-ray ct imaging apparatus and image processing method therefor |
Also Published As
Publication number | Publication date |
---|---|
JPS6013217B2 (en) | 1985-04-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5297632A (en) | Display unit | |
JPS536593A (en) | X-ray apparatus for diagnosis | |
JPS54107746A (en) | Dynamic image strengthening apparatus for fiberscope | |
JPS5345245A (en) | Electrostatic latent image developing apparatus | |
JPS5427838A (en) | Video apparatus for pachinko game | |
JPS5499542A (en) | Picture recomposing device and its method | |
JPS5450252A (en) | Editing unit | |
JPS6458243A (en) | X-ray image processing apparatus | |
JPS57207238A (en) | Testing device for color film | |
JPS52125321A (en) | Ophthalmofundus camera containing fixed view unit | |
JPS52115127A (en) | Preparation and inputting system of japanese sentence in display unit | |
JPS51114143A (en) | Method of indicating images by liquid crystals | |
JPS5376624A (en) | Display reproducing unit for artificial color picture | |
JPS535961A (en) | Sampled image display unit | |
JPS53135522A (en) | Picture display system | |
JPS54159824A (en) | Visual data input device | |
JPS53148231A (en) | Display system for brightness cross section | |
JPS6486962A (en) | Magnetic resonance imaging apparatus | |
JPS52142191A (en) | Display for plant abnormalness | |
JPS55109902A (en) | Oblique image pickup correction system of subject size measuring instrument | |
JPS5316526A (en) | Memory | |
JPS52104020A (en) | Television unit | |
JPS53131030A (en) | Data photographing system for camera | |
JPS52130255A (en) | Console control system for microcomputers | |
JPS5352051A (en) | Exposure unit for color picture tube |