perfusiooniuuringuid

Perfusiooniuuringu (perfusion study) refers to a group of diagnostic techniques that measure the delivery of blood to tissues and organs. The word perfusiooniuuringut, the plural form in Finnish, is used in clinical medicine to describe investigations that quantify blood flow, perfusion rates, and tissue oxygenation. These studies are essential for evaluating both normal physiology and disease processes such as ischemia, infarction, and tumor vascularity.

Typical modalities include nuclear medicine perfusion scintigraphy, where radiotracers such as technetium‑99m or thallium‑201 are injected and the resulting photon emission is recorded, providing regional uptake patterns. Computed tomography perfusion imaging utilises iodinated contrast and rapid image acquisition to map cerebral, coronary, or renal blood flow. Magnetic resonance perfusion, via arterial spin labeling or dynamic susceptibility contrast, offers non‑invasive measurement without ionising radiation. Ultrasound Doppler and contrast‑enhanced echocardiography are also employed to assess regional myocardial perfusion.

Clinically, perfusion studies are integral to stroke assessment, establishing the penumbra and guiding thrombolytic therapy; in oncology they aid in tumour grading and monitoring response to anti‑angiogenic treatments; cardiovascular perfusion imaging helps evaluate coronary artery disease and reserve; and renal perfusion scans contribute to the functional assessment of kidneys after transplantation or in chronic kidney disease.

Recent technological advances include high‑resolution CT perfusion, hybrid PET/CT perfusion imaging, and machine‑learning algorithms that improve segmentation and quantification. These developments enhance diagnostic accuracy, reduce radiation dose, and expand the range of clinical indications for perfusiooniuuringut.