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Related Concept Videos

Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
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Relative Motion Analysis using Rotating Axes-Problem Solving

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Relative Motion Analysis using Rotating Axes - Acceleration01:22

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Distance Corrections

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Related Experiment Video

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Sample Drift Correction Following 4D Confocal Time-lapse Imaging
10:04

Sample Drift Correction Following 4D Confocal Time-lapse Imaging

Published on: April 12, 2014

Lateral drift correction in time-laps images by the particle-tracking algorithm.

Marko Kreft1, Nina Vardjan, Matjaz Stenovec

  • 1Laboratory of Neuroendocrinology-Molecular Cell Physiology, Faculty of Medicine, Institute of Pathophysiology, University of Ljubljana, Zaloska 4, 1000, Ljubljana, Slovenia.

European Biophysics Journal : EBJ
|August 16, 2008
PubMed
Summary
This summary is machine-generated.

We developed a method to correct lateral drift in live-cell imaging by tracking fluorescent vesicles. This correction clarifies changes in fluorescence intensity, showing endocytosis with slow reacidification is unlikely.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Microscopy

Background:

  • Long-term live-cell imaging often suffers from lateral drift, obscuring biological processes.
  • Fluorescently labeled structures, like synaptopHluorin-expressing vesicles, can drift due to experimental conditions or cell motility.
  • Interpreting fluorescence intensity changes requires accounting for potential vesicle movement out of the region of interest.

Purpose of the Study:

  • To detect and compensate for lateral drift in time-lapse confocal microscopy of living cells.
  • To accurately analyze fluorescence intensity changes in single exocytotic vesicles.
  • To differentiate true biological events from artifacts caused by image drift.

Main Methods:

  • Tracking fluorescent puncta (single exocytotic vesicles expressing synaptopHluorin) in confocal images.
  • Identifying lateral drift by analyzing particle movement across frames.
  • Compensating for drift by calculating and applying positional corrections based on Gaussian 2D curve fitting of particle intensity profiles.

Main Results:

  • Lateral drift was successfully identified and compensated for without additional hardware.
  • Drift correction ensured vesicles remained within the region of interest throughout the imaging.
  • Corrected images revealed stable fluorescence intensity over time, challenging the hypothesis of endocytosis with slow reacidification.

Conclusions:

  • A novel, hardware-independent method effectively corrects lateral drift in live-cell confocal imaging.
  • Accurate drift correction is crucial for reliable interpretation of fluorescence dynamics in single vesicles.
  • The observed fluorescence changes are likely not due to endocytosis with slow reacidification, but rather artifacts of uncorrected drift.