Ultrasonic imaging apparatus
First Claim
1. An ultrasonic imaging apparatus comprising:
- an image obtaining unit configured to irradiate an imaging region in a subject into which a contrast agent is injected with an ultrasonic wave, and to obtain tomographic image information that draws the imaging region;
an input unit configured to input scan parameter value information which is set in said image obtaining unit and a target sound pressure parameter value of a sound pressure parameter as an index of an estimated sound pressure in the subject;
an estimated maximum sound pressure parameter value calculating device configured to calculate, at the time of performing the irradiation, an estimated maximum sound pressure parameter value in the subject based on the scan parameter value information and maximum drive voltage information of a piezoelectric transducer group configured to generate the ultrasonic wave, wherein the maximum drive voltage information includes a first maximum drive voltage value at which the estimated maximum sound pressure parameter value exceeds the target sound pressure parameter value and a second maximum drive voltage value smaller than the first maximum drive voltage value; and
a maximum drive voltage optimization device configured to compare, each time the scan parameter value information is changed, the estimated maximum sound pressure parameter value and the target sound pressure parameter value with each other and to optimize a maximum drive voltage value of the maximum drive voltage information, wherein said maximum drive voltage optimization device comprises a voltage value repetitive setting device configured to set, when a second estimated maximum sound pressure parameter value calculated by using the second maximum drive voltage value exceeds the target sound pressure parameter value, the second maximum drive voltage value to the first maximum drive voltage value, and to set a value of half of the second maximum drive voltage value to the second maximum drive voltage value.
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Abstract
An ultrasonic imaging apparatus includes an image obtaining unit for irradiating an imaging region and obtaining tomographic image information that draws the imaging region, an input unit for inputting scan parameter value information and a target sound pressure parameter value as an index of an estimated sound pressure in the subject, an estimated maximum sound pressure parameter value calculating device for calculating an estimated maximum sound pressure parameter value in the subject on the basis of the scan parameter value information and maximum drive voltage information of a piezoelectric transducer group for generating an ultrasonic wave, and a maximum drive voltage optimization device for comparing the estimated maximum sound pressure parameter value and the target sound pressure parameter value and optimizing the maximum drive voltage value of the maximum drive voltage information.
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Citations
16 Claims
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1. An ultrasonic imaging apparatus comprising:
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an image obtaining unit configured to irradiate an imaging region in a subject into which a contrast agent is injected with an ultrasonic wave, and to obtain tomographic image information that draws the imaging region; an input unit configured to input scan parameter value information which is set in said image obtaining unit and a target sound pressure parameter value of a sound pressure parameter as an index of an estimated sound pressure in the subject; an estimated maximum sound pressure parameter value calculating device configured to calculate, at the time of performing the irradiation, an estimated maximum sound pressure parameter value in the subject based on the scan parameter value information and maximum drive voltage information of a piezoelectric transducer group configured to generate the ultrasonic wave, wherein the maximum drive voltage information includes a first maximum drive voltage value at which the estimated maximum sound pressure parameter value exceeds the target sound pressure parameter value and a second maximum drive voltage value smaller than the first maximum drive voltage value; and a maximum drive voltage optimization device configured to compare, each time the scan parameter value information is changed, the estimated maximum sound pressure parameter value and the target sound pressure parameter value with each other and to optimize a maximum drive voltage value of the maximum drive voltage information, wherein said maximum drive voltage optimization device comprises a voltage value repetitive setting device configured to set, when a second estimated maximum sound pressure parameter value calculated by using the second maximum drive voltage value exceeds the target sound pressure parameter value, the second maximum drive voltage value to the first maximum drive voltage value, and to set a value of half of the second maximum drive voltage value to the second maximum drive voltage value. - View Dependent Claims (2, 3, 4)
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5. An ultrasonic imaging apparatus comprising:
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an image obtaining unit configured to irradiate an imaging region in a subject into which a contrast agent is injected with an ultrasonic wave, and to obtain tomographic image information that draws the imaging region; an input unit configured to input scan parameter value information which is set in said image obtaining unit and a target MI value in the subject; an estimated maximum MI value calculating device configured to calculate, at the time of performing the irradiation, an estimated maximum MI value in the subject based on the scan parameter value information and maximum drive voltage information of a piezoelectric transducer group for configured to generate the ultrasonic wave; and a maximum drive voltage optimization device configured to compare, each time the scan parameter value information is changed, the estimated maximum MI value and the target MI value with each other and to optimize a maximum drive voltage value of the maximum drive voltage information, wherein the maximum drive voltage optimization device includes a voltage value monotonous decreasing device configured to gradually decrease a drive voltage value of the piezoelectric transducer group from an overvoltage value at which the estimated maximum MI value exceeds the target MI value at a predetermined voltage interval. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification