Xray to start. Scaphoid fractures can be tough to diagnose. The first study to get is an xray. If you can't see it on that x-ray and the doctor remains concerned, often a repeat x-ray 1-2 weeks later shows it. Other options include a bone scan, ct scan, or mri.
Xrays, CT scan. Scaphoid fractures are a radiographic diagnosis and requires either plain xray or sometimes ct.