Is it possible to display unique images to each participant within a question or message?

hey ​@x87_k9pQ2m , my first question is - how are you distributing your survey?

1. If it is being distributed via Email or SMS, you can store the image reference (URL or unique identifier) as Embedded Data in your participant contact list. You can then pipe that Embedded Data into the survey to display the corresponding image for each respondent. 
2. If the survey is being distributed anonymously, you can use Survey Flow Branch Logic to randomly display different images to respondents. Similarly, if the image to be displayed depends on a respondent's answer to a previous question, you can achieve that using Survey Flow Branch Logic by setting different Embedded Data values or branching respondents to the appropriate survey element

If you can share a bit more about your use case and how you are distributing the survey, I can suggest the most suitable approach.