摘要:
Apparatuses and methods for measuring a velocity component of tissue and blood flow within a human body may generate sample data by transmitting ultrasound signals to and sampling echo signals reflected from the human body, generate frequency distribution data containing the velocity component of tissue and blood flow, extract the frequency distribution data corresponding to the velocity component of tissue flow from the frequency distribution data, and display the extracted frequency distribution data. The apparatuses and methods may also input the frequency distribution data containing the velocity component of tissue and blood flow, eliminate a direct-current component of the frequency distribution data, extract the velocity component of blood flow from the frequency distribution data, determine a maximum value of the extracted velocity component of blood flow, decide a gain level, and multiply the frequency distribution data by the decided gain level.
摘要:
An ultrasonic diagnostic apparatus by which an image having superior space resolution is obtained. The apparatus includes: first means for transmitting an ultrasonic wave, which is continued for at least two cycles, to an object to be inspected, and for detecting an echo signal which is produced by reflection of the transmitted ultrasonic wave from tissue of the object to be inspected to thereby obtain a detection signal; second means for delaying the detection signal by such a time duration corresponding to one cycle of the transmitted ultrasonic wave to thereby obtain a delayed detection signal; and third means for obtaining image information related to the tissue of the object to be inspected based upon a difference between the detection signal and the delayed detection signal.
摘要:
An ultrasonic endoscopic probe tip device which provides signals to an imaging system for transesophageal diagnosis includes a removable housing adapted to be attached to the distal end of an endoscope. A rotatable, ball-bearing-mounted phased array transducer within the housing is rotatable around its acoustic propagation axis through multiple turns. The transducer is driven by an immersed micro-motorized drive. A torque limiting gearbox couples the drive to the transducer. A position encoder provides the imaging system with transducer position information over a 360° range. An automatic transducer position locking/unlocking system is used to lock the transducer in a selected rotational position.
摘要:
Ultrasonic imaging to receive a signal from contrast agent microbubbles in arterioles of a myocardium, without being masked by a signal from microbubbles in capillaries of the myocardium. For example, high power ultrasonic energy is emitted to destroy microbubbles in the arterioles and capillaries. A time delay passes from the destruction. The time delay is sufficiently long to allow the arterioles to refill with microbubbles and sufficiently short so that the capillaries do not completely refill with microbubbles. Ultrasonic imaging is then performed to receive a signal between harmonics from the microbubbles refilled in the arterioles. Various other destructive and non-destructive imaging techniques are disclosed.
摘要:
An ultrasound image is obtained by subjecting an object containing an ultrasound contrast enhancement agent to a first imaging pulse burst and then to a second release pulse and then to a second imaging pulse to obtain two images and then comparing the two images to obtain an enhanced image.
摘要:
An ultrasound cavital probe suitable for transrectal or other usage, includes an ultrasound probe, having an outer housing, a pair of motors within one end of the housing, a first shaft operatively associated with one of the motors to provide longitudinal movement to the ultrasound transducer, while a second shaft operatively associated with the second motor, and which extends through the hollow interior of the first said shaft, provides for pivotal or rotary movement to the ultrasound transducer and probe, to furnish a 2-dimensional view of the surrounding anatomy, and which in combination with the movement from the first shaft, furnishes a 3-dimensional volumetric scan of the surrounding anatomy, along with facilitating the image plane movements normally obtained by a standard probe while used in a stepping device.
摘要:
The control panel of an ultrasound system can be moved laterally from one side of the ultrasound system to the other, enabling an operator to more comfortably operate the ultrasound system while scanning a patient located to the side of the ultrasound system. The control panel locks in its central home position and can be moved linearly to either side of the home position. Detents serve to retain the control panel at different lateral locations. Preferably the control panel can swivel independently of its lateral articulation.
摘要:
Acoustic imaging systems are provided. A representative acoustic imaging system includes a transducer that incorporates a backing and an acoustic element extending from the backing. The acoustic element includes a piezoelectric element and a de-matching layer. The de-matching layer is arranged between the backing and the piezoelectric element and exhibits an acoustic impedance greater than that of the piezoelectric element. The piezoelectric element exhibits a thickness that is less than one-half of a wavelength to be generated by the piezoelectric element. Methods also are provided.
摘要:
Attached to a proximal end portion of a flexible cord of an ultrasound probe of an ultrasound examination system, to be introduced into a body cavity through a narrow guide passage, is a flexible wiring film which can be coiled into a helical roll of a narrow cylindrical shape extending along an axial extension line of the flexible cord at the time of passing same through the narrow guide passage. Formed on a surface of the flexible wiring film are a plural number of wire connection points for connection of signal lines from transducer elements of an ultrasound transducer which is provided at a fore distal end of the flexible cord of the probe, and a corresponding number of electrodes which are electrically connected with the wire connection points through a wiring pattern. The electrodes on the flexible wiring film are disconnectibly connected to corresponding contact points on a contact assembly of a relay means.
摘要:
A micro-machined ultrasonic transducer (MUT) substrate that reduces or eliminates the lateral propagation of acoustic energy includes holes, commonly referred to as vias, formed in the substrate and proximate to a MUT element. The vias in the MUT substrate reduce or eliminate the propagation of acoustic energy traveling laterally in the MUT substrate. The vias can be doped to provide an electrical connection between the MUT element and circuitry present on the surface of an integrated circuit substrate over which the MUT substrate is attached.