Positron emission tomography: new analytic tool for vascular disease

Area of Science:

• Medical imaging
• Nuclear medicine
• Physiology

Background:

• Positron emission tomography (PET) is a noninvasive imaging technique.
• It allows in vivo quantification of regional physiologic and biochemical function.
• PET measures cellular metabolic function by tracking radiolabeled compounds.

Purpose of the Study:

• To highlight the utility of PET in assessing conditions with vascular compromise.
• To demonstrate PET's ability to differentiate normal, ischemic, and irreversibly injured tissues.
• To show PET's role in evaluating the need for and response to vascular surgery.

Main Methods:

• Administration of biochemically active compounds labeled with positron-emitting isotopes.
• Measurement of the distribution of radioactivity to quantify regional function.
• Application of PET to study brain and heart function in normal and ischemic states.

Main Results:

• PET accurately quantifies regional blood flow, oxygen, and substrate metabolism.
• The technique can distinguish between normal, ischemic, and irreversibly injured tissue.
• PET has been used to document the metabolic response to vascular interventions.

Conclusions:

• PET offers a powerful tool for understanding and managing vascular disease.
• Despite its complexity and cost, PET can provide a scientific basis for vascular therapy.
• Its ability to measure metabolic function is crucial for conditions involving vascular compromise.