There are currently no evidence-based methods to detect cannabis-impaired driving, and current field sobriety tests with gold-standard, drug recognition evaluations are resource-intensive and may be prone to bias. This study evaluated the capability of a simple, portable imaging method to accurately detect individuals with Δ9-tetrahydrocannabinol (THC) impairment. Comparing resting state connectivity of post-dose THC and post-dose placebo in impaired participants, we identified decreased connectivity after THC. Furthermore, using standard machine learning algorithms, we were able to predict impairment with >70% accuracy.
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