For the assessment of stable stroke, nuclear medicine scans such as <a rel="mw:WikiLink" href="https://en.wikipedia.org/Single-photon_emission_compute... by @wikipedia

For the assessment of stable stroke, nuclear medicine scans such as single-photon emission computed tomography (SPECT) and positron emission tomography–computed tomography (PET/CT) may be helpful. SPECT documents cerebral blood flow, whereas PET with an FDG isotope shows cerebral glucose metabolism.