[amp_mcq option1=”Sound wave” option2=”X-ray” option3=”Ultra-sound wave” option4=”Magnetic wave” correct=”option4″]
The correct answer is D. Magnetic wave.
An MRI machine uses a strong magnetic field and radio waves to create detailed images of the inside of the body. The magnetic field aligns the hydrogen atoms in the body, and the radio waves cause them to change their alignment. As the hydrogen atoms return to their original alignment, they emit radio waves that are detected by the MRI machine. These radio waves are then used to create a detailed image of the inside of the body.
Sound waves, X-rays, and ultrasound waves are not used in MRI machines. Sound waves are too weak to penetrate the body, X-rays can damage tissue, and ultrasound waves cannot provide the same level of detail as MRI images.
MRI machines are a safe and effective way to diagnose a variety of medical conditions. They are often used to diagnose cancer, heart disease, and stroke. MRI machines are also used to monitor the progress of treatment and to plan surgery.