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Smartphone-Based Rigid Endoscopy Device with Hemodynamic Response Imaging and Laser Speckle Contrast Imaging.

Youngkyu Kim1, Woo June Choi2, Jeongmin Oh3

  • 1Biomedical Engineering Research Center, Asan Medical Center, Seoul 05505, Republic of Korea.

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This study introduces a smartphone-based dual-wavelength laser speckle contrast imaging (LSCI) endoscope for real-time blood flow and oxygenation monitoring. The device offers a valuable platform for point-of-care assessment of vascular hemodynamics in internal organs.

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animal model of ischemiahemodynamic response imaginglaser speckle contrast imagingpoint-of-caresmartphone

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Area of Science:

  • Biomedical Optics
  • Medical Imaging
  • Point-of-Care Diagnostics

Background:

  • Smartphones are increasingly integrated into point-of-care (POC) devices due to advancements in their technology.
  • Previous work demonstrated smartphone-based handheld endoscopy using laser speckle contrast imaging (LSCI).

Purpose of the Study:

  • To develop a multifunctional handheld endoscope combining smartphone technology with dual-wavelength LSCI.
  • To enable simultaneous monitoring of dynamic blood flow and hemoglobin oxygenation (HbO2, Hbr, HbT).

Main Methods:

  • Development of a smartphone-integrated dual-wavelength LSCI system.
  • Utilizing the smartphone for rapid data acquisition and computation of LSCI data.
  • Testing the device with a flow phantom and in vivo rat intestine models during ischemia and reperfusion.

Main Results:

  • The device successfully generated blood perfusion maps using LSCI.
  • In vivo experiments showed decreased blood flow and HbO2 during ischemia and hyperemia post-reperfusion.
  • Demonstrated capability to assess hemodynamic changes in real-time.

Conclusions:

  • The smartphone-combined dual-wavelength LSCI endoscope is a promising platform for functional POC endoscopy.
  • This technology facilitates understanding of vascular hemodynamics in internal organs.
  • Potential applications include diagnosis and treatment monitoring for vascular diseases at the point of care.