Abstract: |
Recently, a definition of molecular imaging was recommended by the Molecular Imaging Center of Excellence (MICoE) and the Society of Nuclear Medicine (SNM). Molecular imaging was defined as "the visualization, characterization, and measurement of biological processes at the molecular and cellular levels in humans and other living systems." Although the term "molecular imaging" was coined in the mid-1990s, it has its roots in molecular and cell biology, as well as in imaging technology, chemistry, and radiochemistry. Molecular imaging is the direct result of significant developments in several noninvasive, in vivo imaging technologies including magnetic resonance imaging (MRI) [59,114], nuclear imaging (gamma camera and a positron emission tomography (PET)) [6], and optical imaging of small animals [36, 57, 112]. |