To date, Spatial Frequency Domain Imaging (SFDI) has only been used in animal models of burns, but has shown the potential to categorize burns accurately at earlier time points. Here we examine the potential for SFDI to assess burn severity in clinical patients. We also utilize Laser Speckle...
Spatial frequency domain imaging (SFDI) is an emerging diffuse optical technology that recently gains significant attention2,23,27,28,29. It can quantify optical properties of turbid media in a label-free, non-contact manner, and its camera-based detection scheme makes it intrinsically wide-field...
spatial frequency compressionspatial frequency shiftssuperresolution microscopyThe diffraction limit substantially impedes the resolution of the conventional optical microscope. Under traditional illumination, the high﹕patial‐frequency light corresponding to the subwavelength information of objects is located in ...
c The Spatial Frequency Domain Every audiophile is familiar with the concept of the temporal frequency response of an audio reproduction system. The notion of the spatial frequency response of an imaging system dates at least as far back as Abbe's (1873) theory of the microscope. However, this...
(\odot\)represents two-dimensional convolution operation. Essentially, this equation shows that the output analog signal is the convolution of the inversed and rescaled input image and the spatial frequency-domain\({E}_{H}(x^{\prime} ,y^{\prime} )\)on Huygens’ metasurfaces. Hence, the ...
The growing scale and dimensionality of multiplexed imaging require reproducible and comprehensive yet user-friendly computational pipelines. TRACERx-PHLEX performs deep learning-based cell segmentation (deep-imcyto), automated cell-type annotation (TYPE
Some applications require combination of spatial filtering modeling of source activity in frequency domain. It is certainly worthwhile to add additional transformation such as Laplace transformation (Kayser and Tenke 2015) to avoid dependence of the reference. The choice of commercial Matlab toolbox may...
A new method has been developed to estimate the spatial resolution of high‐frequency ultrasound (HFU, >20 MHz) imaging systems in 3‐D using a tissue‐mimicking phantom (TMP). The TMP is divided into eight adjacent compartments containing anechoic spheres (6 vol%) with diameters increasing fro...
Finally, we obtain the phase in spatial frequency domain with normalized unity amplitude: $$\varPhi ({k}_{x},{k}_{y})= \frac{k}{2}{\int }_{0}^{\tilde{z}}\left[{\left(\frac{{{\rm{d}}}X(\xi )}{{{\rm{d}}}\xi }\right)}^{2}+{\left(\frac{{{\rm{d}}}Y(\xi ...
Then we investigate the denoising performance of SRDTrans on calcium imaging data sampled at 0.3 Hz, which is 100 times lower than the imaging speed demonstrated above. Bilateral assessments in both the space domain and the frequency domain reveal that SRDTrans can accurately retrieve the fluore...