Magnetic Resonance Imaging (MRI) is a medical imaging technique that generates detailed images of the body’s internal structures. It uses strong magnetic fields and radio waves to create these pictures, which are invaluable for detecting, diagnosing, and monitoring various medical conditions. To produce clear and accurate images, patient stillness throughout the scan is important.
Why Stillness Matters in MRI
An MRI scanner operates by aligning the protons within the body’s water molecules using a powerful magnetic field. Radiofrequency currents are then pulsed, causing these protons to momentarily shift their alignment. When the radiofrequency pulse is turned off, the protons release energy as they realign, which is detected by the MRI machine to form detailed cross-sectional images.
Any movement during this process, even a small twitch or cough, can introduce a “motion artifact” into the images. This appears as blurring, distortion, or “ghosting,” making it difficult for radiologists to accurately interpret the scan. Movement during any sequence can compromise the diagnostic quality of that image slice. Even minor movements can necessitate repeating parts of the scan, extending the overall procedure time.
What to Do If You Need to Cough
If you anticipate a cough before your MRI appointment, inform the medical staff beforehand. This allows them to prepare and offer solutions for comfort. During the MRI scan, you will be in constant communication with the technologist through an intercom or call button.
If you feel a cough coming on while the scan is in progress, immediately alert the technologist. They can then pause the scan, allowing you to cough and compose yourself without compromising image quality. It is better to pause the scan than to try to suppress it, as movement will result in blurry images that may need to be retaken. Technologists are accustomed to such situations and are prepared to assist patients for a successful scan.
Tips for a Comfortable Scan
To minimize coughing or movement during an MRI, several proactive steps can be taken. Informing the medical staff about any existing cough, cold symptoms, or anxiety before the scan allows them to provide support. If you have a persistent cough, discuss taking an over-the-counter cough suppressant with your doctor prior to the appointment.
Staying well-hydrated in the days leading up to your scan can soothe a dry throat, potentially reducing the urge to cough. Practicing lying still for a few minutes at home can mentally prepare you for the scan duration. Utilizing relaxation techniques, such as deep breathing exercises, can help manage anxiety and promote stillness during the procedure.