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Ultrasound Localization Microscopy (ULM) is an advanced ultrasound imaging technique. By localizing microbubbles, ULM overcomes the physical limit of diffraction, achieving sub-wavelength level resolution and qualifying as a super-resolution technique. [1] [2] ULM is primarily utilized in vascular imaging.
Functional ultrasound imaging (fUS) is a medical ultrasound imaging technique for detecting or measuring changes in neural activities or metabolism, such as brain activity loci, typically through measuring hemodynamic (blood flow) changes.
A microscopy technique relying on the photoacoustic effect, [61] i.e. the generation of (ultra)sound caused by light absorption. A focused and intensity modulated laser beam is raster scanned over a sample. The generated (ultra)sound is detected via an ultrasound transducer. Commonly piezoelectric ultrasound transducers are employed. [62]
English: The main applications and features of functional ultrasound (fUS) imaging. fUS imaging provides (i) a compatibility with a wide range of animal models for preclinical studies, (ii) the ability to image awake and freely moving animals, (iii) possibility to combine with super-resolution ultrasound localization microscopy, (iv) possible extension to 3D imaging, (v) functional ...
Ultrasound is defined by the American National Standards Institute as "sound at frequencies greater than 20 kHz". In air at atmospheric pressure, ultrasonic waves have wavelengths of 1.9 cm or less. Ultrasound can be generated at very high frequencies; ultrasound is used for sonochemistry at frequencies up to multiple hundreds of kilohertz.
Ultrasound attenuation spectroscopy; Ultrasound avoidance; Ultrasound Localization Microscopy; Ultrasound research interface; Ultrasound transmission tomography; Ultrasound-enhanced systemic thrombolysis; Ultrasound-switchable fluorescence imaging; Ultrasound-triggered drug delivery using stimuli-responsive hydrogels; Urinary tract ultrasound
Molecular imaging is a field of medical imaging that focuses on imaging molecules of medical interest within living patients. This is in contrast to conventional methods for obtaining molecular information from preserved tissue samples, such as histology.
Multi-spectral. MSOT collects images at multiple wavelengths and resolves the spectral signatures in each voxel imaged, making it a multi-spectral method. Typically, MSOT is used to generate three images: one anatomical image at a single wavelength, one functional image resolving oxy- and deoxy-hemoglobin concentrations, and a third image resolving additional target photoabsorber(s).