General information, not an individual diagnosis. Ask a healthcare professional if you are unsure about your situation.
A chest CT produces cross-sectional images using X-rays. MRI uses a different technology without X-rays. Keep the exact name of the prescribed examination when speaking to the imaging team: the instructions depend on the examination planned.
A contrast agent is needed in some cases. The agents used for CT and MRI differ. Ask the team whether contrast is planned for your CT and which instructions apply, rather than reusing preparation given for a different examination.
Before the examination, mention a possible pregnancy, allergies, a reaction to a previous contrast injection, your medical conditions and your medicines. This information helps the team prepare for your circumstances; it does not allow you to decide on your own whether the examination can proceed.
Bring the referral or prescribing doctor's letter, your medicine prescriptions, previous examination results and any relevant surgical report. Have the instructions about food and medicines explained before changing anything.
During the CT, the team stays in contact and guides you on keeping still or breathing. Ask how to receive the report and whom to review it with: the radiologist may explain it, or the prescribing doctor may discuss it later.
New breathlessness without signs of respiratory distress requires medical assessment the same day. In France, call 15 or 112 immediately if it prevents you from finishing sentences or comes with bluish lips or changes in alertness. Do not wait for the planned CT to obtain this care.
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