SLC6A3 and carbon monoxide poisoning: The aims of this study were (1) to evaluate 99mTC-TRODAT-1 SPECT to assess the severity of DAT damage associated with MRI findings after CO poisoning; (2) to assess DAT availability before and after HBOT using 99mTC-TRODAT-1 SPECT; and (3) to evaluate multi-modal synergistic 99mTC-TRODAT-1 SPECT and MRI as an index for parkinsonian or non-parkinsonian syndromes in patients with CO poisoning.