Discography is a medical procedure that involves injecting a dye into the jellylike center of a spinal disc to help diagnose back problems. During discography, a health professional evaluates the amount of pressure needed to inject the dye into the disc, whether it causes pain, how much dye is used, and how the dye…
Discography is a medical procedure that involves injecting a dye into the jellylike center of a spinal disc to help diagnose back problems. During discography, a health professional evaluates the amount of pressure needed to inject the dye into the disc, whether it causes pain, how much dye is used, and how the dye…
A computed tomography (CT) scan uses X-rays to make pictures of the head and face. During the test, you will lie on a table that is attached to the CT scanner, which is a large doughnut-shaped machine. Your head will be positioned inside the scanner. The CT scanner sends X-rays through the head. Each rotation of the…
Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to take pictures of the head. In many cases, MRI gives information that can’t be seen on an X-ray, ultrasound, or computed tomography (CT) scan. For an MRI of the head, you lie with your head inside a special machine…
Courtesy of Intermountain Medical Imaging, Boise, Idaho. Many people have more than one artery for blood flow to the kidneys. Figure 1 is an angiogram showing the main artery supplying blood flow to the kidney. Figure 2 is an angiogram showing a second artery helping to supply blood to the kidney.