Computer system for the image synthesis of a transverse body section and method for the operation of the computer system

• US 4,259,721 A
• Filed: 04/11/1978
• Issued: 03/31/1981
• Est. Priority Date: 02/10/1977
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Kuznia, Christian
• Primary Examiner(s): Krass, Errol A.
• Application Number:
  US05/895,395
• Time in Patent Office: 1,085 Days
• Field of Search: 364/414, 364/527, 364/515, 250/445 T, 250/363 S, 250/369, 358/111
• US Class Current: 382/131
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: G06T 11/006 Inverse problem, transformation from projection-space into object-space, e.g. transform methods, back-projection, algebraic methods
• CPC Class Codes: G06T 2211/428 Real-time
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

Coordinated with the detectors of a computer system for tomography is a multimicroprocessor which contains a computer module with a microprocessor as well as coupling, program, and data memories for each individual detector. Coordinated with the identical computer modules is one common control computer which carries out the individual phases of the image reconstruction in a three-phase operation (SMS system) permitting a transverse body section in which the information from each of the scans is processed simultaneously to be constructed in only a few seconds.

Claims

1. A computer system for the image synthesis of a transverse body section with image elements successively transmitted by rays in an image plane in various directions, the rays detected by a plurality of detectors, comprising:

(a) a plurality of computer modules, one being provided for each of said detectors, each module including a microprocessor, and associated therewith an input-output port for receiving information from a respective detector, a data memory, and a bus switch;

(b) a common control computer having associated therewith a program memory and an image synthesis memory, said common control computer programmed to control each of said plurality of microprocessors; and

(c) means interconnecting each of said microprocessors to said common control computer through their respective bus switches.

2. A computer system according to claim 1, wherein all of said microprocessors are connected to a common system bus which is controlled by said common control computer.

3. A computer system according to claim 2, wherein said image synthesis is carried out utilizing both folded data and image information of a part image of the entire transverse body section and wherein each computer module data memory includes capacity for storing both folded data and the image information of a part image of the entire transverse body section.

4. The computer system according to claim 3, wherein said data memory includes a read only memory (ROM) in which the address for each image element is stored and can be recalled.

5. A computer system according to claim 1, wherein said image synthesis is carried out utilizing both folded data and image information of a part image of the entire transverse body section and wherein each computer module data memory includes capacity for storing both folded data and the image information of a part image of the entire transverse body section.

6. The computer system according to claim 5, wherein said data memory includes a read only memory (ROM) in which the address for each image element is stored and can be recalled.

7. The computer system according to claim 1, wherein said data memory includes a read only memory (ROM) in which the address for each image element is stored and can be recalled.

8. A method for the operation of a computer system for the image synthesis of a transverse body section with image elements successively transmitted by rays in an image plane in various directions, the rays detected by a plurality of detectors using apparatus including a plurality of computer modules, one being provided for each of said detectors, each module including a microprocessor, and associated therewith an input-output port for receiving information from a respective detector, a data memory, and a bus switch;

a common control computer having associated therewith a program memory and an image synthesis memory, said common control computer programmed to control each of said plurality of microprocessors; and

means interconnecting each of said microprocessors to said common control computer through their respective bus switches comprising;

(a) storing information furnished by the detectors in the memories of their respective computer modules;

(b) correcting the information stored in said memories simultaneously and independently of each other in each computer module;

(c) folding the corrected data so obtained in each of the individual computer modules under control of said common control computer; and

(d) subsequently constructing a partial picture of the entire transverse body section utilizing the folded data from each computer module.

9. The method according to claim 8, wherein at least the folding of the corrected data takes place in a three-phase operation, comprising:

(a) a control phase during which the control computer only is operating, establishing the initial state of the computer modules and signaling them which problem they will have to solve;

(b) a succeeding autonomous phase, during which the microprocessors of the computer modules solve the problems assigned to them by their programs simultaneously and independently of each other and then signal the control computer through a stop signal that they have completed their program; and

(c) an information transmission phase which commences after the control computer has received a stop signal from at least a selection of microprocessors determined by the circuitry and during which, controlled by the control computer, the data exchange between the memories of the computer modules and, if applicable, data storage in the image synthesis memory takes place.