Interaction of dopamine transporter and metabolite ratios underpinning the cognitive dysfunction in patients with carbon monoxide poisoning: A combined SPECT and MRS study

•Altered metabolite ratios in patients with carbon monoxide poisoning (COP).•Decreased dopamine transporter availability in COP patients.•Significant executive and memory dysfunctions in COP patients.•Both imaging indices associated with cognitive dysfunctions in COP patients.•Predicting COP induced executive dysfunction complementary by two imaging indices.