Understanding MRI, CT and Ultrasound

[Daqi Medical Team]

Imaging tests look at the body in different ways. Understanding the basics helps you prepare and understand why a particular test is chosen.

Key points to know

• MRI uses magnets and radio waves, with no ionising radiation.
• CT is fast and uses X-rays; useful in emergencies.
• Ultrasound uses sound waves and is common in pregnancy.
• Tell staff about implants, pregnancy or contrast allergies.

At a glance

Topic	What it means for you
MRI	Detailed soft tissue; no ionising radiation
CT	Fast; uses X-rays
Ultrasound	Real-time; no radiation
Contrast	May be used for clarity

When to seek medical advice

Contact the imaging department if you are pregnant, have a metal implant, or have had a reaction to contrast dye.

This educational article was prepared by the Daqi Medical Team for general information only. It is not a substitute for professional diagnosis or treatment. Please consult a qualified clinician about your own situation. Posted by Daqi Medical Team.

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