Conventional SPECT data was also acquired for these phantoms using the camera's scintillation detector with a lead collimator.
Magnetic resonance imaging (MRIs), PET scans, and single-photon emission computed tomography (SPECT) scans have been used by researchers, however, to study the brains of patients diagnosed with Tourette syndrome.
Positron emission tomography (PET) and single photon emission tomography (SPECT) monitor blood flow and chemical activity in the brain area being tested.
Hence above the spots there are vapours of temperature low enough to give the banded spectra of this refractory metal, while only line spectra of sodium, iron and others fusible at more moderate temperatures are found (see also Spect Roheliogra Ph).