Microangiography typically involves the injection of a contrast agent into the bloodstream, which enhances the visibility of blood vessels under imaging techniques such as X-ray, MRI, or CT scans. In histological studies, the tissue samples are often stained with specific dyes that highlight the blood vessels. The process generally includes the following steps:
1. Preparation: The tissue sample is fixed and embedded in a medium like paraffin. 2. Sectioning: Thin slices of the tissue are cut using a microtome. 3. Staining: The sections are stained with contrast agents such as India ink or radiopaque dyes. 4. Imaging: The stained sections are imaged using appropriate techniques to visualize the microvasculature.