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 method for injecting a contrast medium using a liquid injector into a subject whose fluoroscopic image is to be captured by an imaging diagnostic apparatus, comprising:
- registering data of a base operation-condition, including (i) data of a variable pattern and (ii) data of a predetermined injection time for an injection;
controlling operation of said liquid injector so as to;
(a) read out the base operation-condition,(b) calculate a total volume of the contrast medium to be injected, based on data of necessary dose of effective component per unit weight, data of subject'"'"'s weight, and data of concentration of the effective component,(c) make an injection pattern based on the base operation-condition and the calculated total volume of the contrast medium, by moving a waveform of the variable pattern vertically depending on the total volume with said predetermined injection time unchanged for all volumes of the contrast medium, so that the area surrounded by the waveform will correspond to the volume of contrast medium, and(d) perform an injection in accordance with said injection pattern, without changing any injection parameter during the injection.
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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.
27 Citations
5 Claims
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1. A method for injecting a contrast medium using a liquid injector into a subject whose fluoroscopic image is to be captured by an imaging diagnostic apparatus, comprising:
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registering data of a base operation-condition, including (i) data of a variable pattern and (ii) data of a predetermined injection time for an injection; controlling operation of said liquid injector so as to; (a) read out the base operation-condition, (b) calculate a total volume of the contrast medium to be injected, based on data of necessary dose of effective component per unit weight, data of subject'"'"'s weight, and data of concentration of the effective component, (c) make an injection pattern based on the base operation-condition and the calculated total volume of the contrast medium, by moving a waveform of the variable pattern vertically depending on the total volume with said predetermined injection time unchanged for all volumes of the contrast medium, so that the area surrounded by the waveform will correspond to the volume of contrast medium, and (d) perform an injection in accordance with said injection pattern, without changing any injection parameter during the injection. - View Dependent Claims (2, 3, 4)
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5. A method for injecting a contrast medium into a subject using a liquid injector whose fluoroscopic image is to be captured by an imaging diagnostic apparatus, comprising:
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registering data of a base operation-condition, including (i) data of an injection rate and (ii) data of a predetermined injection time for an injection; controlling operation of said liquid injector so as to; (a) read out the base operation-condition, (b) calculate a total volume of the contrast medium to be injected, based on data of necessary dose of effective component per unit weight, data of subject'"'"'s weight, and data of concentration of the effective component, (c) make an injection pattern based on the base operation-condition and the calculated total volume of the contrast medium, by moving a waveform of the injection rate vertically depending on the total volume with said predetermined injection time unchanged for all volumes of the contrast medium, so that the area surrounded by the waveform will correspond to the volume of contrast medium, and (d) perform an injection in accordance with said injection pattern, without changing any parameter during the injection.
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Specification