EP0147055A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A data disc system for a computed tomography X-ray scanner
Assignee: Toshiba Corp
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Filing: 1984-11-21
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Granted: —
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Expires: 2004-11-21
Abstract
Abstract A computed tomography X-ray scanner employs a plurality of discs 56a-d which are asynchronously operated by controllers 58a-58d. A processor 54 either writes data in parallel into the same cylinder of different disc drives 56a-d and subsequently reads data in parallel from different cylinders of the discs into a memory unit 46, or writes data from the memory 56 in parallel to different cylinders of the disc drives 56a-d and reads data in parallel from the same cylinder of different ones of the disc drive, so that the data in converted from source fan format into detector fan format.
Inventors
- 👤 David R. Akebia Ltd. Baldwin
- 👤 Douglas H. Akebia Ltd. Hodgkiss
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 21:07
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/06; G06F3/0601; G06T; G06T12/00; G06T12/10; G06F3/0668; G06F3/0671; G06F3/0673; Y; Y10; Y10S; Y10S378/00; Y10S378/901
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
159 words
1 . A data disc system for a computer tomography X-ray scanner having a plurality of detectors (42), a source of X-rays (44) movable relative to the detectors, and a memory unit (46) which receives data from the detectors (42) in source fan format, the system comprising: a plurality of disc drives (56); and processor means (54, 58) for writing the data from the memory unit (46) into the disc drives (56) and for reading the data from the disc drives back into the memory unit (46), the processor means (54, 58) ordering the storage locations of the data in the disc drives (56) upon writing the data into the disc drives (56) and ordering the storage locations of the data in the disc drives (56) from where the data is read, to convert the data from source fan format to detector fan format upon reading of the data from the disc drives (56) into the memory unit (46).
Claim 2
Dependent Claim
159 words
1 . A data disc system for a computer tomography X-ray scanner having a plurality of detectors (42), a source of X-rays (44) movable relative to the detectors, and a memory unit (46) which receives data from the detectors (42) in source fan format, the system comprising: a plurality of disc drives (56); and processor means (54, 58) for writing the data from the memory unit (46) into the disc drives (56) and for reading the data from the disc drives back into the memory unit (46), the processor means (54, 58) ordering the storage locations of the data in the disc drives (56) upon writing the data into the disc drives (56) and ordering the storage locations of the data in the disc drives (56) from where the data is read, to convert the data from source fan format to detector fan format upon reading of the data from the disc drives (56) into the memory unit (46).
Claim 3
Dependent Claim
22 words
A data disc system as claimed in claim 1 wherein the processor means includes means (58) for asynchronously operating the disc drives.
Claim 4
Dependent Claim
28 words
A data disc system as-claimed in claim 1 or claim 2 wherein the processor means (54, 58) writes data in-parallel into the same cylinder of different disc drives.
Claim 5
Dependent Claim
34 words
A data disc system as claimed in claim 2 or 3 wherein the processor means (54, 58) reads data in parallel from different cylinders of the disc drives (56) into the memory unit (46).
Claim 6
Dependent Claim
34 words
A data disc system as claimed in claim 1 or claim 2 wherein the processor means (54, 58) writes data from the memory (46) in parallel to different cylinders in the disc drives (56).
Claim 7
Dependent Claim
38 words
A data disc system as claimed in claims 2 or 5 wherein the processor means (54, 58) reads data in parallel from the same cylinder of different ones of the disc drives (56) into the memory unit (46).
Claim 8
Dependent Claim
144 words
7 . A data disc system as claimed in claim 3 wherein the detectors (42) generate a plurality of samples for a cycle of operation and only a limited number of detectors (42) are excited in any one sample, and wherein the processor means (54, 58) writes data in parallel from the limited number of detectors (42) for a group of sequentially generated samples stored in the memory unit (46) into the same cylinder of each of the disc drives (56) in an order which locates the data for select sets of the detectors (42) for a plurality of the groups of the samples in different cylinders of the disc drives for each group; and reads data for the select sets of the detectors in parallel from different cylinders of the disc drives (56) back into the memory unit (46) in detector fan format.
Claim 9
Dependent Claim
139 words
A data disc system as claimed in claim 5 wherein the detectors (42) generate a plurality of samples for a cycle of operation and only a limited number of detectors (42) are excited in any one sample, and wherein the processor means (54, 58) writes data in parallel from the limited number of detectors (42) for a group of sequentially generated samples stored in the memory unit (46) into different cylinders of each of the disc drives (56) in an order which locates the data for select sets of said detectors for a plurality of the groups of samples in the same cylinder of the disc drives (56) for each group; and reads data for the select sets of the detectors in parallel from the same cylinder of the discs into the memory unit (46) in detector .fan format.
Claim 10
Dependent Claim
45 words
A data disc system as claimed in claim 7 or 8 wherein the processor means includes a plurality of disc interface processors (112), with each disc interface processor associated with at least one of the disc drives to control operation of the the disc drives.
Claim 11
Dependent Claim
49 words
A data disc system as claimed in ciaim 9 wherein the system includes an image processor (50) for constructing output signals which represent an image of a target being scanned by the system, and the image processor constructs an output signal from data signals organised in detector fan format.
Claim 12
Dependent Claim
58 words
A data disc system as claimed in claim 10 wherein the processor means includes a data channel processor (108) and disc system coordinator (110) coupled between the image processor (50) and the interface processors (112), the data channel processor (108) and disc system coordinator (110) controlling operation of said disc interface processors (112) independent of the image processor.
Claim 13
Dependent Claim
43 words
A data disc system as claimed in claims 9 to 11 wherein said disc interface processors (117) each include means for operating the disc drives associated with that disc interface processor asynchronously from disc drives associated with the other disc interface processors (112).
Claim 14
Dependent Claim
148 words
A computed tomography X-ray scanner comprising: a plurality of detectors (42); a source of X-rays (44) movable relative to the detectors (42); a memory unit (56) which receives data from the detectors (42) in source fan format; a plurality of disc drives (56); and processor means (54, 58) for writing the data from the memory unit (46) into the disc drives (56) and for reading the data from the disc drives (5C) back into said memory unit (46), the processor means (54, 58) ordering the storage locations of the data in the disc drives upon writing the data into the disc drives (56) and ordering the storage locations of the data in the disc drives from which the data is read, to convert the data from source fan format to detector fan format upon reading of the data from the disc drives (56) into the memory unit (46).
Claim 15
Dependent Claim
148 words
A computed tomography X-ray scanner comprising: a plurality of detectors (42); a source of X-rays (44) movable relative to the detectors (42); a memory unit (56) which receives data from the detectors (42) in source fan format; a plurality of disc drives (56); and processor means (54, 58) for writing the data from the memory unit (46) into the disc drives (56) and for reading the data from the disc drives (5C) back into said memory unit (46), the processor means (54, 58) ordering the storage locations of the data in the disc drives upon writing the data into the disc drives (56) and ordering the storage locations of the data in the disc drives from which the data is read, to convert the data from source fan format to detector fan format upon reading of the data from the disc drives (56) into the memory unit (46).
Claim 16
Dependent Claim
24 words
A computed tomography X-ray sanner as claimed in claim 13 wherein the processor means (54, 58) includes means for asynchronously operating the disc drives.
Claim 17
Dependent Claim
31 words
15 . A computed tomography X-ray scanner as claimed in claim 14 wherein the processor means (54, 58) writes data in parallel into the same cylinder of different disc drives (56).
Claim 18
Dependent Claim
35 words
A computed tomography X-ray scanner as claimed in claim 13 or 14 wherein said processor means (54, 58) reads data in parallel from different cylinders of the disc drives (56) into the memory unit (46).
Claim 19
Dependent Claim
33 words
A computed tomography X-ray scanner as claimed in claim 14 wherein the processor means (54, 58) writes data from the memory unit (46) in parallel to different cylinders in the disc drives (56).
Claim 20
Dependent Claim
39 words
A computed tomography X-ray scanner as claimed in claims 14 or 17 wherein the processor means (54, 58) reads data in parallel from the same cylinder of different ones of the disc drives (56) into the memory unit (46).
References Cited (Backward Citations)
No citation records indexed.
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