JPS5499542A - Picture recomposing device and its method - Google Patents

Picture recomposing device and its method

Info

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
Application number
JP575678A
Other languages
Japanese (ja)
Other versions
JPS6013217B2 (en
Inventor
Tamon Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP53005756A priority Critical patent/JPS6013217B2/en
Publication of JPS5499542A publication Critical patent/JPS5499542A/en
Publication of JPS6013217B2 publication Critical patent/JPS6013217B2/en
Expired legal-status Critical Current

Links

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
JP53005756A 1978-01-24 1978-01-24 Image reconstruction device and method Expired JPS6013217B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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