Fast XYT imaging of elementary calcium release events in muscle with multifocal multiphoton microscopy and wavelet denoising and detection.

von Wegner F, Both M, Fink R, Friedrich O (2007)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2007

Journal

IEEE Transactions on Medical Imaging Institute of Electrical and Electronics Engineers (IEEE)

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 26

Pages Range: 925-34

Journal Issue: 7

URI: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4265757

DOI: 10.1109/TMI.2007.895471

Abstract

We used multifocal multiphoton microscopy to image fast, localized elevations of the cytosolic Ca2+ concentration in two spatial dimensions plus time (XYT). This technique extends the common spatially 1-D XT imaging and allows the acquisition of more than ten times longer time series (>500 images) and ten times larger areas of interest than for previously used confocal XYT imaging techniques due to lower phototoxicity and fast multifocal scanning. We recorded spontaneously occurring elementary Ca2+ release events in chemically permeabilized adult mammalian skeletal muscle fibers using two-photon excitation of the fluorescent dye Fluo-4. The resulting time series were analyzed with an automated denoising and detection algorithm based on the à trous implementation of the discrete wavelet transform. Wavelet coefficient hard-thresholding is used for denoising and event detection is performed across several wavelet scales. The spatiotemporal characteristics of the detected Ca2+ release events are followed throughout the XYT stack and are parametrized using a biophysically valid anisotropic Gaussian event model. The proposed method allows a detailed spatiotemporal analysis of elementary Ca2+ release events underlying the excitation-contraction coupling process in muscle.

Authors with CRIS profile

Oliver Friedrich Lehrstuhl für Medizinische Biotechnologie

Involved external institutions

Ruprecht-Karls-Universität Heidelberg DE Germany (DE) Goethe-Universität Frankfurt am Main DE Germany (DE)

How to cite

APA:

von Wegner, F., Both, M., Fink, R., & Friedrich, O. (2007). Fast XYT imaging of elementary calcium release events in muscle with multifocal multiphoton microscopy and wavelet denoising and detection. IEEE Transactions on Medical Imaging, 26(7), 925-34. https://doi.org/10.1109/TMI.2007.895471

MLA:

von Wegner, Frederic, et al. "Fast XYT imaging of elementary calcium release events in muscle with multifocal multiphoton microscopy and wavelet denoising and detection." IEEE Transactions on Medical Imaging 26.7 (2007): 925-34.

BibTeX: Download