Which of the following are true about MRI machines? Check all of the boxes that apply.

MRI machines use strong magnets and radio waves to create detailed images, especially of soft tissues, so C is true. Metal objects worn during the scan can be attracted by the magnet or interfere with the images, so patients must remove them; D is true. Measuring electrical activity in the heart is done with an ECG, and exercising during a scan is not normal MRI use.

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