Fredrik Gran
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Ultrasound super-resolution imaging with a hierarchical Kalman tracker Open
Microbubble (MB) tracking plays an important role in ultrasound super-resolution imaging (SRI) by enabling velocity estimation and improving image quality. This work presents a new hierarchical Kalman (HK) tracker to achieve better perform…
Super-Resolution Imaging with Ultrasound for Visualization of the Renal Microvasculature in Rats Before and After Renal Ischemia: A Pilot Study Open
In vivo monitoring of the microvasculature is relevant since diseases such as diabetes, ischemia, or cancer cause microvascular impairment. Super-resolution ultrasound imaging allows in vivo examination of the microvasculature by detecting…
Super-resolution Ultrasound Imaging of the Renal Microvasculature in Rats with Metabolic syndrome Open
Super-resolution Ultrasound imaging (SRI) can visualize and quantify changes in the microvasculature. Metabolic syndrome is associated with hypertension and hyperlipidemia that affects different organs, including the kidneys. Ex vivo studi…
Super-Resolution Ultrasound Imaging of Rat Kidneys before and after Ischemia-Reperfusion Open
In vivo visualization of the microvasculature is feasible with super-resolution ultrasound imaging (SRI), but the method needs more affirmative data before clinical use. The kidneys have a rich vasculature, and microvascular dysfunction de…
Semi-non-intrusive objective intelligibility measure using spatial filtering in hearing aids Open
Reliable non-intrusive online assessment of speech intelligibility can play a key role for the functioning of hearing aids, e.g. as guidance for adjusting the hearing aid settings to the environment. While existing intrusive metrics can pr…
The role of spectral detail in the binaural transfer function on perceived externalization in a reverberant environment Open
Individual binaural room impulse responses (BRIRs) were recorded at a distance of 1.5 m for azimuth angles of 0° and 50° in a reverberant room. Spectral details were reduced in either the direct or the reverberant part of the BRIRs by aver…
Experimental study of generalized subspace filters for the cocktail party situation Open
This paper investigates the potential performance of generalizedsubspace filters for speech enhancement in cocktail partysituations with very poor signal/noise ratio, e.g. down to-15 dB. Performance metrics output signal/noise ratio, signa…