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Plane wave imaging is generally performed using linear array transducers which array pitch is larger than one wavelength, resulting in grating lobe artifacts. In addition, larger element width associated with linear array transducers reduces delay accuracy for delay-and-sum based plane wave beamformation and therefore causes higher sidelobes and lower imaging contrast. To suppress both of the artifacts,...
Sentinel lymph nodes (SLNs) are the first draining lymph nodes while the metastatic cancer cells are spreading. A noninvasive imaging modality for SLN identification with fine needle aspiration biopsy (FNAB) would be beneficial for staging the axillary lymph nodes without surgical intervention. Here we propose a method - ultrafast pulsed magnetomotive ultrasound (pMMUS) for noninvasive SLN identification,...
Generally, the grating-lobe artifacts can be avoided with array pitch smaller than one half of wavelength; however, due to cost or physical limitations, such a condition is hard to be satisfied in multi-dimension or high frequency array transducers. Besides grating lobes, side-lobe signals also affect imaging contrast and quality. To suppress the side-lobes, the window method such as Tukey window...
Recently, pulsed magnetomotive ultrasound (pMMUS) imaging has been introduced to detect magnetic nanoparticles (MNPs) which are not able to be visualized by conventional ultrasound. However, because of the used magnetic short pulse, the reported pMMUS only can use a single-element ultrasound transducer along with mechanical scanning to perform imaging, which significantly limits the imaging fame rate...
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