Patient health information is confidential by law. When in doubt, err toward not sharing — you can always call back after you've verified, but you can't take information back once it's out.
The process splits by what the patient wants — their images, their report, or both.
Images. A patient can have a copy of their own imaging on USB. The USB must be brand new and still sealed in its packaging — don't reuse a stick, and don't accept a USB the patient brought in. Hand it over in person at the front desk.
Report. We don't release the written report directly to the patient. Direct them to pick it up from their GP, referring doctor, or allied health professional — the report is sent there.
Your obligations come from the Privacy Act 1988, the Australian Privacy Principles (APPs), and state-specific health-records legislation (e.g. the Health Records Act in Victoria). You don't need to memorise the statutes — you need to remember the core rule at the top of this page. When in doubt, err toward not sharing.