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[Near-infrared rays in tissue diagnosis]
Biomedizinische Technik. Biomedical Engineering
|July 1, 1993
Summary
Near-Infrared Radiation enables non-invasive examination of internal body parts, visualizing blood vessels without contrast agents. New methods allow detailed imaging of subcutaneous vessels and detection of inhomogeneities in substances like blood.
Area of Science:
- Biomedical optics
- Medical imaging
Context:
- Near-Infrared (NIR) Radiation offers a non-invasive approach for examining internal body structures.
- Conventional methods may require contrast agents or lack penetration depth.
Purpose:
- To introduce a transmission method for NIR imaging capable of penetrating thick biological tissues (> 30 mm).
- To present a novel method for evaluating reflected NIR light to localize inhomogeneities in organic substances up to 20 mm deep.
Summary:
- NIR Radiation allows for specific, non-invasive visualization of local hematocrit and subcutaneous blood vessels without contrast media.
- The transmission method achieves high definition imaging in focus regions, particularly for peripheral body sections (NIR-Microangiopathy).
- A new technique using reflected NIR light enables precise, non-invasive localization of inhomogeneities in substances like milk and blood.
Impact:
- Enhances diagnostic capabilities for conditions like peripheral microangiopathy.
- Provides a contrast-agent-free imaging modality for vascular structures.
- Expands the application of NIR imaging to deeper tissues and various organic substances.