According to WebMD, an MRI of the brain is a painless, non-invasive test in which a magnetic field and radio wave energy are used to take pictures of the brain and nervous tissues. A patient lies with her head inside a s... More »

www.reference.com Health Diagnostics & Imaging

A PET scan uses a moving camera that records the movement of a tracer through the body, turning the recording into pictures on a computer, explains WebMD. An MRI is a test that produces very clear pictures of the human b... More »

www.reference.com Health Diagnostics & Imaging

An Magnetic Resonance Imaging, or MRI, scan works by sending the patient through an enormous circular magnet, explains MedicineNet. The magnetic field aligns hydrogen atoms in the body in such a way that radio waves can ... More »

www.reference.com Health Diagnostics & Imaging

A head magnetic resonance imaging scan, or MRI, is a test that produces images of the brain using a strong magnetic field and radio-wave energy, according to WebMD. It typically offers useful information that X-ray, ultr... More »

www.reference.com Health Diagnostics & Imaging

An MRI scan is a medical test that uses a magnetic field and radio waves to create a detailed picture of organs and other structures inside the body. MRI stands for magnetic resonance imaging. More »

A magnetic resonance imaging or MRI is a test that generates images of the brain and adjacent tissue by use of radio waves and magnetic fields, states MedlinePlus. It's also known as an MRI of the head and is applicable ... More »

www.reference.com Health Diagnostics & Imaging

MedlinePlus states that an MRI scan can last anywhere between 10 minutes to 2 hours. The test generally lasts for 30 to 60 minutes for most patients. Once the test is complete, the MRI technician informs the patient and ... More »