摘要:
A method and system for multiple view volume rendering are provided. The method includes identifying a plurality of view directions relative to an image of an object and automatically volume rendering a volumetric data set based on the plurality of view directions. The method further includes generating an image for each view direction using the rendered data.
摘要:
A method and system for multiple view volume rendering are provided. The method includes identifying a plurality of view directions relative to an image of an object and automatically volume rendering a volumetric data set based on the plurality of view directions. The method further includes generating an image for each view direction using the rendered data.
摘要:
Ultrasonic visualisation of a suject, particularly of perfusion in the myocardium and other tissues, is performed using novel gas-containing contrast agent preparations which promote controllable and temporary growth of the gas phase in vivo following administration and can therefore act as deposited perfusion tracers. The preparations include a coadministerable composition comprising a diffusible component capable of inward diffusion into the dispersed gas phase to promote temporary growth thereof. In cardiac perfusion imaging the preparations may advantageously be coadministered with vasodilator drugs such as adenosine in order to enhance the differences in return signal intensity from normal and hypoperfused myocardial tissue respectively.
摘要:
A method of measuring tissue perfusion in a human or non-human animal subject which comprises administering an effective amount of an ultrasound contrast agent to said subject, irradiating tissue in a target region with at least one pulse of ultrasound having energy sufficient to destroy or discernibly modify the echogenic properties of substantially all contrast agent in said target region, and ultrasonically detecting and quantifying the rate of flow of either further contrast agent into said target region or modified contrast agent out of said target region.
摘要:
Temporal variations in backscatter from an ultrasound contrast agent located in the vascular system and induced by movement of the scatterers are used to visualise the presence of contrast agent by determining areas where correlation between successive ultrasound images is poor. This low level of correlation arising from intravascular contrast agent movement permits distinction between stationary bulk tissue and moving bulk tissue since movement of the latter solid tissue scatterers is correlated.
摘要:
An acquisition component is provided that includes an audible sound sensor configured to receive audible sounds within a sensing area and a multi-element ultrasound transducer configured to emit ultrasound signals and to receive reflections of the ultrasound signals in the same sensing area. The audible sound sensor and the multi-element ultrasound transducer may be configured to be simultaneously operable.
摘要:
Ultrasound contrast agents comprising microbubbles of biocompatible gas, e.g. a sulphur halide or a perfluorocarbon, stabilized by opsonisable amphiphilic material, e.g. a membrane-forming lipid such as a phospholipid, especially a negatively charged phospholipid such as a phosphatidylserine, may exhibit prolonged contrast-generating residence time in the liver following intravenous administration.
摘要:
A method and apparatus for detecting cardiac events. Ultrasonic data comprising a heart cycle is acquired by a probe. Tissue velocities associated with the ultrasonic data are detected. One of a maximum and a minimum value is detected based on the tissue velocities. A time within the heart cycle associated with the maximum or minimum value is determined, and a cardiac event is detected with respect to the time within the heart cycle and the maximum or minimum value.
摘要:
A knowledge based diagnostic imaging system, comprising diagnostic equipment for analyzing a patient to obtain a new patient data set containing at least one of MR data, CT data, ultrasound data, x-ray data, SPECT data and PET data. The diagnostic equipment automatically analyzes the new patient data set with respect to a physiologic parameter of the patient to obtain a patient value for said physiologic parameter. A database containing past patient data sets for previously analyzed patients. The past patient data sets contain data indicative of the physiologic parameter with respect to previously analyzed patients. A network interconnects the diagnostic equipment and the database to support access to the past patient data sets.
摘要:
Local aberrations in the perfusion and/or compliance of vasculated tissue may be detected by contrast agent-enhanced ultrasound imaging procedures wherein a sequence of ultrasound image data is generated in respect of a region of interest in vasculated tissue, the image data is processed to generate waveforms representative of arterial pulsatility, and these waveforms are analyzed for variations such as phase distortions which are characteristic of local aberrations in tissue perfusion and/or compliance.