This study investigates patient perspectives on informed consent for the use of AI tools in medical diagnosis. A survey experiment with 1000 respondents in South Korea was conducted to assess the perceived importance of information regarding AI tool usage in decision-making. The results show that the use of AI tools increases the perceived importance of information related to their use, compared to when a physician consults with a human radiologist. Participants perceived information about AI tools as either more important or similar to the regularly disclosed information about short-term effects when AI is used. Further analysis revealed that gender, age, and income significantly affect the perceived importance of AI information. The study concludes that disclosure of AI use in diagnosis should be part of the informed consent process, tailored to individual patient needs. Ethical guidelines for informed consent when using AI in diagnoses should go beyond legal requirements to address the diverse information needs of patients.This study investigates patient perspectives on informed consent for the use of AI tools in medical diagnosis. A survey experiment with 1000 respondents in South Korea was conducted to assess the perceived importance of information regarding AI tool usage in decision-making. The results show that the use of AI tools increases the perceived importance of information related to their use, compared to when a physician consults with a human radiologist. Participants perceived information about AI tools as either more important or similar to the regularly disclosed information about short-term effects when AI is used. Further analysis revealed that gender, age, and income significantly affect the perceived importance of AI information. The study concludes that disclosure of AI use in diagnosis should be part of the informed consent process, tailored to individual patient needs. Ethical guidelines for informed consent when using AI in diagnoses should go beyond legal requirements to address the diverse information needs of patients.