Image improvement in linear-array photoacoustic imaging using high resolution coherence factor weighting technique

Enhanced Linear-array Photoacoustic Beamforming using Modified Coherence Factor

Photoacoustic imaging (PAI) is a promising medical imaging modality providing the spatial resolution of ultrasound imaging and the contrast of optical imaging. For linear-array PAI, a beamformer can be used as the reconstruction algorithm. Delay-and-sum (DAS) is the most prevalent beamforming algorithm in PAI. However, using DAS beamformer leads to low-resolution images as well as high sidelobe...

Photoacoustic Microscopy and Photoacoustic Computed Tomography Using High-frequency Linear Array Ultrasonic Transducers

A New Adaptive Imaging Technique Using Generalized Coherence Factor

Beamforming artifacts due to sound velocity inhomogeneities degrade both spatial and contrast resolution. In this paper, a new adaptive imaging technique is proposed to minimize such beamformation artifacts using the generalized coherence factor (GCF) weighting. The simulation and experimental results show that the proposed technique can significantly improve the degraded image quality due to p...

Robust Fuzzy Content Based Regularization Technique in Super Resolution Imaging

Super-resolution (SR) aims to overcome the ill-posed conditions of image acquisition. SR facilitates scene recognition from low-resolution image(s). Generally assumes that high and low resolution images share similar intrinsic geometries. Various approaches have tried to aggregate the informative details of multiple low-resolution images into a high-resolution one. In this paper, we present a n...

High-resolution imaging of gynecologic neoplasms using optical coherence tomography.

BACKGROUND A modality capable of imaging the female reproductive tract, at or near the cellular level, could lead to the detection of diseases at earlier stages than currently possible. Optical coherence tomography achieves high resolutions in the cellular range (4-20 microm) and could accomplish that level of detection. METHOD Optical coherence tomography imaging of gynecologic tissue was st...