Liquid injector for injecting contrast medium at variable rate into a subject who is to be imaged by imaging diagnostic apparatus
First Claim
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1. A liquid injector for injecting a contrast medium into a subject whose fluoroscopic image is to be captured by an imaging diagnostic apparatus, comprising:
- a liquid injection mechanism for injecting said contrast medium into said subject;
pattern storing means for registering data of a variable pattern in which an injection rate of the contrast medium for keeping an image contrast of the fluoroscopic image within a predetermined range varies with time; and
rate controlling means for varying an operating speed of said liquid injection mechanism with time according to said variable pattern.
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Abstract
A liquid injector registers the data of a variable pattern in which an injection rate of a contrast medium varies with time. The injection rate of the contrast medium varies with time according to the variable pattern for maintaining a state in which the image contrast achieved by the contrast medium approximates an optimum level.
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Citations
17 Claims
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1. A liquid injector for injecting a contrast medium into a subject whose fluoroscopic image is to be captured by an imaging diagnostic apparatus, comprising:
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a liquid injection mechanism for injecting said contrast medium into said subject;
pattern storing means for registering data of a variable pattern in which an injection rate of the contrast medium for keeping an image contrast of the fluoroscopic image within a predetermined range varies with time; and
rate controlling means for varying an operating speed of said liquid injection mechanism with time according to said variable pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer unit for controlling operation of a liquid injection mechanism of a liquid injector for injecting a contrast medium into a subject whose fluoroscopic image is to be captured by an imaging diagnostic apparatus, comprising:
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pattern storing means for registering data of a variable pattern in which an injection rate of the contrast medium varies with time; and
rate controlling means for varying an operating speed of said liquid injection mechanism with time according to said variable pattern. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification