Perfuusiokuvaus

Perfuusiokuvaus, also known as perfusion imaging, is a medical imaging technique used to assess blood flow through tissues and organs. It is a functional imaging method that visualizes the movement of blood, providing information about the vascularity of a particular area. This is distinct from anatomical imaging, which focuses on the structure of tissues.

The technique typically involves the administration of an imaging agent, often a contrast dye or a radioactive tracer, which is then tracked as it circulates through the bloodstream. Specialized imaging equipment, such as MRI or CT scanners, is used to detect and measure the distribution and arrival time of this agent within the target tissue. By analyzing the patterns of uptake and washout, clinicians can infer the rate of blood flow and the volume of blood within the tissue.

Perfuusiokuvaus has a wide range of clinical applications. It is crucial in diagnosing and monitoring conditions affecting blood supply, such as stroke, where it can identify areas of reduced blood flow that may be salvageable. In oncology, it helps in evaluating tumor vascularity, assessing treatment response, and identifying areas of potential metastasis. It is also used in cardiology to assess myocardial perfusion and detect areas of ischemia. The specific method and imaging agent used depend on the organ being studied and the clinical question being addressed.