The National Institutes of Health (NIH) is offering the Imaging - Science Track Award for Research Transition (I/START) program, which invites applications for small research grants (R03) aimed at advancing neuroimaging studies related to substance use and substance use disorders (SUD). This funding opportunity encourages both new and established investigators to conduct "proof of concept" studies that can lead to larger research proposals, with a focus on understanding the neurobiology of addiction and its interactions with mental health disorders. Eligible applicants include a wide range of institutions, such as higher education institutions, nonprofits, and government entities, with direct costs capped at $150,000 for one year. Interested parties should submit their applications by January 8, 2025, and can reach out to the NIH OER Webmaster at grantsinfo@nih.gov for further assistance.