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Preclinical imaging is the visualization of living animals for research purposes, [1] such as drug development. Imaging modalities have long been crucial to the researcher in observing changes, either at the organ, tissue, cell, or molecular level, in animals responding to physiological or environmental changes.
Two-photon excitation microscopy of mouse intestine.Red: actin.Green: cell nuclei.Blue: mucus of goblet cells.Obtained at 780 nm using a Ti-sapphire laser.. Two-photon excitation microscopy (TPEF or 2PEF) is a fluorescence imaging technique that is particularly well-suited to image scattering living tissue of up to about one millimeter in thickness.
Fluorescence imaging with one nanometer accuracy (FIONA): utilizes total internal reflection illumination to reduce noise and increase brightness of fluorophores [5] Calcium imaging: technique that utilizes fluorescent molecules called calcium indicators that change in fluorescence when bound to Ca 2+ ions. This is a key part in seeing when ...
[2] [6] [7] Photomicrograph of a histological section of human skin prepared for direct immunofluorescence using an anti-IgG antibody. The skin is from a patient with systemic lupus erythematosus and shows IgG deposit at two different places: The first is a band-like deposit along the epidermal basement membrane ("lupus band
Spatial Frequency Domain Imaging (SFDI) is a non-invasive optical imaging method that uses spatially modulated light to extract quantitative information about tissue properties. Its large field of view coupled with its quantitative approach to imaging has made it a novel imaging modality, with many use cases in murine pre-clinical trials.
Imaging lenses and digital cameras (CCD or CMOS) are used to produce the final image. Live video processing can also be performed to enhance contrast during fluorescence detection and improve signal-to-background ratio. In recent years a number of commercial companies have emerged to offer devices specializing in fluorescence in the NIR ...
Optoacoustic mesoscopy is suitable for imaging skin lesions. Studies in preclinical models have imaged subcutaneous lesions and their vascular networks and demonstrated the potential to reveal lesion details such as depth, vascular morphology, oxygenation and melanin content.
A 2010 study demonstrated a moderate amount of protein misfolding cyclic amplification (PMCA) coupled to a novel SOFIA detection scheme, can be used to detect PrP Sc in protease-untreated plasma from preclinical and clinical scrapie sheep, and white-tailed deer with chronic wasting disease, following natural and experimental infection.
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