Ultrasonic diagnostic apparatus
First Claim
1. An ultrasonic diagnostic apparatus comprising:
- ultrasonic transmission and reception means for transmitting ultrasonic pulses into a moving target in the body, and receiving echo signals reflected from the moving target;
driving means for generating ultrasonic pulses to be transmitted by said ultrasonic transmission and reception means;
processing means for detecting Doppler signals by detecting phase of the echo signals;
sample volume setting means for designating an observation region in the moving target by means of a range gate having a gate width;
a sampling means for sampling the Doppler signals in the range gate; and
a control means for controlling said sampling means so that the gate width is smaller than the width of the observation region according to the designation of said sample volume setting means.
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Accused Products
Abstract
An ultrasonic diagnostic apparatus including a probe which transmits a burst wave of ultrasonic pulses into a target in a body and receives reflected echo signals, a transmission unit which drives the probe, a receiver which delays the echo signals from the probe by delay times substantially equal to the delay times in the transmission unit, 2D image processing unit which performs predetermined processing on the output signals from the receiver in order to indicate a tomographic image, a Doppler-mode processing unit which performs predetermined processing on the output signals from the receiver in order to indicate the frequency spectrum of the received signals, a display unit which displays each processed result from the a 2D image processing unit and the Doppler-mode processing unit, a sample volume setting device which designates an observation region (sample volume) such as observation length (spatial length of the sample volume) and observation location (sample volume depth) to obtain a Doppler shift frequency, and a control unit which controls the transmission unit and the Doppler processing unit so that a width of a range gate is smaller than the width of an observation region designated by the sample volume setting device.
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Citations
29 Claims
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1. An ultrasonic diagnostic apparatus comprising:
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ultrasonic transmission and reception means for transmitting ultrasonic pulses into a moving target in the body, and receiving echo signals reflected from the moving target; driving means for generating ultrasonic pulses to be transmitted by said ultrasonic transmission and reception means; processing means for detecting Doppler signals by detecting phase of the echo signals; sample volume setting means for designating an observation region in the moving target by means of a range gate having a gate width; a sampling means for sampling the Doppler signals in the range gate; and a control means for controlling said sampling means so that the gate width is smaller than the width of the observation region according to the designation of said sample volume setting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification