Multi-color fluorescence imaging is a powerful tool for studying the spatial relationships and interactions among sub-cellular structures in biological specimens. However, if improperly corrected, geometrical distortions caused by mechanical drift, refractive index mismatch, or chromatic aberration can lead to lower image resolution. In this paper, we present an extension of the image processing framework of Scipion by integrating a protocol called OFM Corrector, which corrects geometrical distortions in real-time using a B-spline-based elastic continuous registration technique. Our proposal provides a simple strategy to overcome chromatic aberration by digitally re-aligning color channels in multi-color fluorescence microscopy images, even in 3D or time. Our method relies on a geometrical calibration, which we do with fluorescent beads excited by different wavelengths of light and subsequently registered to get the elastic warp as a reference to correct chromatic shift. Our software is freely available with a user-friendly GUI and can be broadly used for various biological imaging problems. The paper presents a valuable tool for researchers working in light microscopy facilities.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1088/2050-6120/ace153 | DOI Listing |
Adv Sci (Weinh)
December 2024
Engineering Product Development, Singapore University of Technology and Design, Singapore, 487372, Singapore.
Spatially selective imaging (SSI) involves sampling a group of pixels from different positions on an encoded object to display a decoded image. Here, SSI is achieved by using off-axis cylindrical Fresnel lens arrays to decode multiple images from an encoded print of structural color pixels. Each image is optically retrieved by separately placing different "keys" (arrays of lenses in different pseudorandom configurations) over the same encoded print, and then each image is digitally reconstructed for visualization.
View Article and Find Full Text PDFFront Neurosci
December 2024
Intramural Research Program, National Institute on Drug Abuse National Institutes of Health, Baltimore, MD, United States.
Miniature fluorescence microscopes (miniscopes) are one of the most powerful and versatile tools for recording large scale neural activity in freely moving rodents with single cell resolution. Recent advances in the design of genetically encoded calcium indicators (GECIs) allow to target distinct neuronal populations with non-overlapping emission spectral profiles. However, conventional miniscopes are limited to a single excitation, single focal plane imaging, which does not allow to compensate for chromatic aberration and image from two spectrally distinct calcium indicators.
View Article and Find Full Text PDFBiomed Opt Express
December 2024
Departamento de Óptica y Optometría y Ciencias de la Visión, Universitat de València, Burjassot, Spain.
In this work, we present two new multifocal intraocular lens (MIOL) designs, both based on the silver mean kinoform diffractive lens. We demonstrate that a single aperiodic diffractive profile can be used to create two different MIOLs: one with a kinoform structure and the other with a stepwise profile. Quantitative assessment of the designs was carried out using the through focus modulation transfer function and the area under the modulation transfer function for the prediction of their visual performance.
View Article and Find Full Text PDFBiomed Opt Express
December 2024
Departament d'Òptica i Optometria, Universitat Politècnica de Catalunya - BarcelonaTech, Violinista Vellsolà 37, 08222 Terrassa, Spain.
This study investigates whether a diffractive presbyopia-correcting multifocal intraocular lens disrupts the favorable interaction between chromatic and monochromatic aberrations in the eye. This is analyzed not only for distant objects but also for closer viewing distances, where the lens utilizes different diffraction orders depending on its design. We consider diffractive designs based on the zero-diffraction order for far vision and the first diffraction order for near vision (i.
View Article and Find Full Text PDFAsia Pac J Ophthalmol (Phila)
December 2024
The Primasia International Eye Research Institute of The Chinese University of Hong Kong (Shenzhen), Shenzhen, China. Electronic address:
Myopia has ever-rising prevalence in the past few decades globally. Its pathogenesis is still not adequately elucidated especially at the signal transduction level. For the environmental risk factors, there is a large body of fragmented knowledge about the visual inputs for accommodation, myopiagenesis and emmetropization, with the latter two being essentially local processes.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!