A tomographic microscopy-compatible Langendorff system for the dynamic structural characterization of the cardiac...

Area of Science:

• Cardiovascular Research
• Medical Imaging
• Biophysics

Background:

• Cardiac architecture is traditionally studied ex vivo, limiting understanding of its dynamic nature.
• Investigating the heart as a dynamic system is crucial for understanding the cardiac cycle's structural mechanisms.

Purpose of the Study:

• To customize an isolated, perfused heart system for synchrotron-based X-ray phase contrast imaging (X-PCI).
• To enable high-resolution, 4D visualization of a beating heart.
• To provide a tool for studying cardiac structural dynamics and the effects of substances on the cardiac cycle.

Main Methods:

• Customization of an isolated, perfused heart system.
• Integration with synchrotron-based X-ray phase contrast imaging (X-PCI).
• 4D imaging of a beating isolated, perfused rat heart.

Main Results:

• First-ever 4D visualization of a beating isolated, perfused rat heart.
• Achieved unprecedented 2.75 μm pixel size (10.6 μm spatial resolution).
• Attained 1 ms temporal resolution, capturing cardiac cycle dynamics.

Conclusions:

• The developed setup enables high-spatial resolution studies of heart architecture during the cardiac cycle.
• This system has the potential to characterize structural dynamics of the heart.
• It can be used to study the effects of drugs and other substances on cardiac function.