See the Project List for ideas for your project. Ideas are listed for different grade levels and for different Categories.
See the list of Medical Engineering Projects by Erin Gaugler.
These Websites may also help you pick a topic to study.
Free Full-Version Autodesk Software for students and teachers.
For additional guidance with your project, see "Elements of a Successful Project" and the "2015 Rules and Regulations" in the BEST Medicine Student Handbook and Rules and Regulations.