摘要:
An ultrasonic diagnostic imaging system and method are described by which a fundamental frequency signal is transmitted into the body and harmonic (nonlinear) echo returns are received from the transmission. The harmonic echo signals are Doppler processed and displayed. The harmonic Doppler signals may be displayed alone, or in combination with a fundamental frequency or harmonic grayscale image. In a preferred embodiment harmonic signals returned from moving tissue are segmented on an intensity or frequency basis and displayed. The inventive apparatus and method provide highly resolved ultrasonic images of moving tissue which are substantially unobscured by image clutter from structures or tissue in the near field.
摘要:
A method and a device for conducting perfusion studies on myocardial tissues with contrast agents is provided. In accordance with the method, ultrasound pulses are transmitted (111) into a patient, and ultrasound echoes of the pulses are received (113) which correspond to both myocardial tissue blood and chamber blood within said patient. The received ultrasound echoes are converted (115) into image data which corresponds to essentially only the myocardium perfusion.
摘要:
An ultrasonic diagnostic apparatus comprises a unit for generating image data, an image reconstructing unit and an image synthesizing unit. The unit for generating image data generates image data for displaying a tomogram of a subject by luminance according to signal intensities of echo signals obtained through ultrasonic waves transmitted to the subject. The image reconstructing unit generates reconstructed images by alternating at least one of a luminance and a color of an area of a predetermined luminance so that the area of the predetermined luminance is emphasized in the image data while the predetermined luminance is altered in turn. The image synthesizing unit supplies the reconstructed images to a display unit so that the reconstructed images are displayed on the display unit in turn.
摘要:
An ultrasound color flow imaging system is programmed to optimize display images of power and velocity by automatically adjusting thresholds by using histograms.
摘要:
An ultrasonic diagnostic apparatus comprises a unit for generating image data, an image reconstructing unit and an image synthesizing unit. The unit for generating image data generates image data for displaying a tomogram of a subject by luminance according to signal intensities of echo signals obtained through ultrasonic waves transmitted to the subject. The image reconstructing unit generates reconstructed images by alternating at least one of a luminance and a color of an area of a predetermined luminance so that the area of the predetermined luminance is emphasized in the image data while the predetermined luminance is altered in turn. The image synthesizing unit supplies the reconstructed images to a display unit so that the reconstructed images are displayed on the display unit in turn.
摘要:
A method and an apparatus for improving visualization of a needle-like instrument (54), such as a biopsy needle, inserted in a human body as described. The instrument is visualized by transmitting an ultrasound beam (56) toward the instrument (54) and then detecting the echo signals (58) using a linear array (2) of transducer elements (2'). The problem of ultrasound being reflected from a biopsy needle in a direction away from the transducer array (2) is solved by steering the transmitted ultrasound beam (56) to increase the angle at which the beam impinges upon the biopsy needle. Ideally the ultrasound beam is perpendicular to the biopsy needle. This increases the system's sensitivity to the needle because the reflection from the needle is directed closer to the transducer array. This can be accomplished using either the B mode or the color flow mode of an ultrasound imaging system.