Ultrasound diagnostic apparatus
First Claim
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1. An ultrasound diagnostic apparatus comprising:
- a transmitter/receiver section for forming a set of transmitting and receiving beams in a repetitive manner within a scan region in which Doppler information is measured, to obtain a plurality of receiving signals for each receiving beam address;
a scanning control section for controlling repetitive formation of the set of transmitting and receiving beams; and
a Doppler image forming section for forming a Doppler image representing movement information of a blood flow or a tissue existing within the scan region based on the plurality of receiving signals obtained for each receiving beam address, wherein the scanning control section sets a plurality of partial regions within the scan region, sequentially designates a partial region among the plurality of partial regions, and controls the transmitter/receiver section such that a partial scan operation is performed a plurality of times in a repetitive manner within the partial region which is designated, and in the repetitive partial scan operation to be performed a plurality of times, at a turning point from the i-th partial scan operation to the (i+1)th partial scan operation, a dummy transmitting beam is formed so as to reduce discontinuity of receiving conditions caused by the turning of the partial scan operation, after a last set of transmitting and receiving beams in the i-th partial scan operation is formed and before a first set of transmitting and receiving beams in the (i+1)th partial scan operation is formed.
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Abstract
In an ultrasound diagnostic apparatus for forming a Doppler image, a plurality of partial regions are set within a scan region in which Doppler information is obtained. A partial scan operation is performed a plurality of times in a repetitive manner in each of the partial regions. In each partial region, a set of dummy transmitting and receiving beams is formed immediately before formation of the first set of transmitting and receiving beams. As the receiving beam in the first set of the transmitting and receiving beams is affected by the dummy transmitting beam, the receiving conditions can be unified over a plurality of sets of transmitting and receiving beams. A set of dummy transmitting and receiving beams may be provided immediately before the first partial scan operation or formation of a set of dummy transmitting and receiving beams in such a case may be omitted.
12 Citations
12 Claims
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1. An ultrasound diagnostic apparatus comprising:
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a transmitter/receiver section for forming a set of transmitting and receiving beams in a repetitive manner within a scan region in which Doppler information is measured, to obtain a plurality of receiving signals for each receiving beam address;
a scanning control section for controlling repetitive formation of the set of transmitting and receiving beams; and
a Doppler image forming section for forming a Doppler image representing movement information of a blood flow or a tissue existing within the scan region based on the plurality of receiving signals obtained for each receiving beam address, wherein the scanning control section sets a plurality of partial regions within the scan region, sequentially designates a partial region among the plurality of partial regions, and controls the transmitter/receiver section such that a partial scan operation is performed a plurality of times in a repetitive manner within the partial region which is designated, and in the repetitive partial scan operation to be performed a plurality of times, at a turning point from the i-th partial scan operation to the (i+1)th partial scan operation, a dummy transmitting beam is formed so as to reduce discontinuity of receiving conditions caused by the turning of the partial scan operation, after a last set of transmitting and receiving beams in the i-th partial scan operation is formed and before a first set of transmitting and receiving beams in the (i+1)th partial scan operation is formed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification
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Current AssigneeAloka Company Limited (Hitachi, Ltd.)
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Original AssigneeAloka Company Limited (Hitachi, Ltd.)
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InventorsSeki, Yoshinori, Ohshima, Nobuo, Motokawa, Katsufumi
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Application NumberUS11/333,104Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current600/447CPC Class CodesG01S 15/8979 Combined Doppler and pulse-...G01S 7/52085 Details related to the ultr...G01S 7/52095 using multiline receive bea...
