Which imaging technique provides 3D information about metabolism and function?

Positron emission tomography (PET) is a powerful imaging technique that provides detailed 3D information about metabolism and functional processes occurring within the body. This technique operates by detecting gamma rays emitted from the decay of positron-emitting radioisotopes that have been introduced into the body, usually in the form of a radiopharmaceutical.

One of the key advantages of PET is its ability to illustrate metabolic activity in various tissues. For instance, areas of high glucose metabolism can be highlighted, which is particularly useful in oncology for detecting cancerous lesions, as tumors often exhibit increased metabolic activity compared to normal tissue. Additionally, PET can visualize other metabolic processes and provide insights into the physiological conditions of organs and systems.

In contrast, other imaging techniques, while offering valuable structural or functional information, do not provide the same level of metabolic detail. Single-photon emission computed tomography (SPECT) also offers functional data but generally has lower sensitivity and resolution compared to PET when it comes to metabolic imaging. Magnetic resonance imaging (MRI) is excellent for anatomical and some functional imaging, such as perfusion, but not specifically for metabolic processes. Computed tomography (CT), on the other hand, primarily provides structural imaging with minimal functional information.

Overall, the unique ability