Table 2 Comparison of optical imaging to conventional functional imaging techniques
Techniques | Spatial resolution | Temporal resolution | Size/portability | Average cost (estimated per United States dollar) |
|---|---|---|---|---|
fNIRS | Centimeter | Milliseconds | Small; portable | Thousands to tens of thousands |
DOT | Millimeter | Milliseconds | Small; portable | Thousands to tens of thousands |
fMRI | Millimeter | Seconds | Large; not portable | Millions |
EEG | Centimeter | Milliseconds | Small; portable | Thousands to tens of thousands |
MEG | Centimeter | Milliseconds | Large; not portable | Millions |
PET | Millimeter | Minutes | Large; not portable | Millions |
SPECT | Centimeter | Minutes | Large; not portable | Hundreds of thousands |