General information, not an individual diagnosis. Ask a healthcare professional if you are unsure about your situation.
Mammography is an X-ray examination of the breast: it produces images using X-rays. Compressing the breast helps image quality and reduces the radiation needed.
CT scanning also uses X-rays. It obtains cross-sectional images that a computer can reconstruct. The name CT therefore does not describe a technique without X-rays.
MRI, or magnetic resonance imaging, uses a magnetic field and electromagnetic waves. It does not use X-rays. Its operating principle helps explain why implants must be checked with the team.
Ultrasound produces images from sound waves sent by a probe and the returning echoes. Abdominal ultrasound does not use X-rays; the area examined and examination route determine preparation.
The absence of X-rays does not remove the need for precautions. Before MRI, report implanted devices and the information requested by the team; for ultrasound, confirm instructions for the planned technique.
Find the exact name of the prescribed examination before contacting the imaging service. Ask about the procedure, instructions and receipt of the report; knowing which rays are used is insufficient to choose a different examination.
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