摘要:
The ultrasonic diagnostic apparatus of the invention evaluates a shape or qualitative property of an organism's arterial wall tissue and includes: a delay control section 3 for controlling delays for ultrasonic vibrators 1 in an ultrasonic probe 2; a transmitting section 5 for driving the probe under the control of the control section 3 such that the probe 2 transmits a first ultrasonic beam toward different locations within a scan region, defined along the axis of the artery, every predetermined frame period; a receiving section 6 for receiving ultrasonic echoes, generated by getting the first beam reflected by the wall, at the probe every set of frame periods, thereby outputting a first group of ultrasonic echo signals; and a signal processing section 13 for calculating a thickness variation, or elasticity, of the tissue between measuring points on the tissue in response to the first group of echo signals. The section 13 selects one of the echo signals of the first group every frame period according to an axial velocity of the tissue to make calculations at each measuring point.
摘要:
An ultrasonic diagnostic apparatus according to the present invention includes: a transmitting section 14 for driving an ultrasonic probe 13 sending out an ultrasonic transmitted wave toward a tissue of an organism; a receiving section 15 for receiving an ultrasonic reflected wave, produced by getting the ultrasonic transmitted wave reflected by the tissue of the organism, through the ultrasonic probe to generate a received signal; a phase detecting section 17 for detecting the phase of the received signal to generate a phase detected signal; a positional displacement calculating section 31a for calculating the magnitudes of positional displacements at multiple measuring points, set on the tissue of the organism, based on the phase detected signal; a thickness variation calculating section 31b for calculating thicknesses or thickness variations, each measured between two arbitrary points set with respect to the measuring points, based on the magnitudes of positional displacements; and a maximum/minimum value calculating section 31c for finding the maximum and minimum thicknesses or thickness variations during a maximum value finding period and a minimum value finding period, which are defined as respective partial periods of one cardiac cycle of the organism. At least one of the greatest thickness difference, strain and elastic property is calculated based on a difference between the maximum and minimum thicknesses or thickness variations.
摘要:
An ultrasonic diagnostic apparatus includes: a positional displacement calculating section for calculating the magnitudes of positional displacements at multiple measuring points within a body tissue; a thickness variation calculating section for calculating thicknesses or thickness variations, each measured between two arbitrary points within the tissue set with respect to the measuring points, based on the magnitudes of positional displacements; and a maximum/minimum value calculating section for finding the maximum and minimum thicknesses or thickness variations during a maximum value finding period and a minimum value finding period. At least one of the greatest thickness difference, strain and elastic property is calculated based on a difference between the maximum and minimum thicknesses or thickness variations.
摘要:
An ultrasonic diagnostic apparatus includes: a transmitting section for driving a probe transmitting an ultrasonic wave to a subject; a receiving section for amplifying a reflected echo, produced by getting the ultrasonic wave reflected by a tissue and received at the probe, to generate a received signal; an image processing section for generating a tomographic image of the subject based on the signal; a region setting section for setting an arbitrary range of the tomographic image as a region of interest; a motion information gathering section for getting the motion information of the subject at measuring points on the subject based on the signal; a property value calculating section for calculating the property values of target tissues of the subject, specified by the measuring points, by reference to the motion information; and a distribution plotting section, which gets the property measured values and plots a frequency distribution of the property values based on the property values of the target tissues located within the region of interest set by the setting section.
摘要:
An ultrasonic diagnostic apparatus according to the present invention includes: a transmitting section, which drives a probe that transmits an ultrasonic wave toward a subject; a receiving section, which receives an ultrasonic echo, produced by getting the ultrasonic wave reflected by the subject, through the probe, thereby generating a received signal; a property value calculating section for calculating property values of the subject based on the received signal over a period of time; a stability estimating section for sequentially estimating the degrees of stability of the property values that have been calculated over the period of time; and a presenting section for presenting the degrees of stability thereon.
摘要:
The ultrasonic diagnostic apparatus of the present invention includes: a transmitting section 14 for driving an ultrasonic probe 13 to send an ultrasonic transmitted wave to an organism's tissue; a receiving section 15 for amplifying an ultrasonic reflected wave, produced by getting the transmitted wave reflected by the tissue and received by the ultrasonic probe 13, to generate a received signal; a frame calculating section 19 for calculating shape measured values of the tissue based on the received signal and figuring out a spatial distribution frame, representing the spatial distribution of the shape measured values and/or property measured values of the organism every cardiac cycle, based on the shape measured values of the tissue; a difference calculating section 19 for calculating a difference between the shape measured values or property measured values of two of the spatial distribution frames calculated every cardiac cycle; a storage section for storing the shape measured values, property measured values and/or difference; and a display section 21 for presenting the frames thereon.
摘要:
An ultrasonic diagnostic apparatus includes: a transmitting section for driving a probe transmitting an ultrasonic wave to a subject; a receiving section for amplifying a reflected echo, produced by getting the ultrasonic wave reflected by a tissue and received at the probe, to generate a received signal; an image processing section for generating a tomographic image of the subject based on the signal; a region setting section for setting an arbitrary range of the tomographic image as a region of interest; a motion information gathering section for getting the motion information of the subject at measuring points on the subject based on the signal; a property value calculating section for calculating the property values of target tissues of the subject, specified by the measuring points, by reference to the motion information; and a distribution plotting section, which gets the property measured values and plots a frequency distribution of the property values based on the property values of the target tissues located within the region of interest set by the setting section.
摘要:
An ultrasonic diagnostic apparatus according to the present invention includes: a transmitting section, which drives a probe that transmits an ultrasonic wave toward a subject; a receiving section, which receives an ultrasonic echo, produced by getting the ultrasonic wave reflected by the subject, through the probe, thereby generating a received signal; a property value calculating section for calculating property values of the subject based on the received signal over a period of time; a stability estimating section for sequentially estimating the degrees of stability of the property values that have been calculated over the period of time; and a presenting section for presenting the degrees of stability thereon.
摘要:
A vascular endothelial reactivity measuring apparatus according to the present invention includes: a blood flow blocking section 2 for blocking blood flow through the arterial blood vessel of an organism; an evaluating section 4 for evaluating the geometric property of the arterial blood vessel or its wall; and a control section 3 for controlling the blood flow blocking section such that the blood flow through the arterial blood vessel is repeatedly blocked and unblocked in at least two iterative blocking/unblocking cycles. During at least a part of a period in which the blood flow through the arterial blood vessel is unblocked, the evaluating section 4 evaluates the geometric property and processes data, representing the geometric property during the partial period, in the iterative blocking/unblocking cycle.
摘要:
An ultrasonic diagnostic apparatus includes: a transmitting section for driving an ultrasonic probe sending out an ultrasonic transmitted wave toward a body tissue of an organism; a receiving section for receiving an ultrasonic reflected wave, produced by getting the transmitted wave reflected by the body tissue, through the probe; a phase detecting section for detecting the phase of the reflected wave; and a computing section for calculating the magnitudes of positional displacement at multiple measuring points on the body tissue based on a signal obtained by the detecting section and calculating the greatest thickness difference between two of the measuring points and/or an elastic property based on the magnitudes of positional displacement. The computing section calculates the maximum and minimum thicknesses or thickness variations between the two points based on the magnitudes of positional displacement at the two points during a part of one cardiac cycle, and calculates the greatest thickness difference and/or elastic property as the difference between the maximum and minimum values.