CT imaging combines special x-ray equipment with sophisticated computers to produce multiple images or pictures of the inside of the body. These cross-sectional images of the area being studied can then be examined on a computer monitor or printed.
MR imaging uses a powerful magnetic field, radio frequency pulses and a computer to produce detailed pictures of organs, soft tissues, bone and virtually all other internal body structures. MRI does not use ionizing radiation (x-rays).
Ultrasound is a simple, safe, painless diagnostic procedure that bounces high-frequency sound waves off parts of the body and captures the returning "echoes" as images. There is no injection or radiation exposure associated with ultrasound.
Imaging guidance such as fluoroscopy or computed tomography (CAT scan) may be used to help the doctor place the needle in exactly the right location so the patient can receive the maximum benefit from the injection.
X-rays are a form of electromagnetic radiation, just like visible light. These particles pass through the body. A computer or special film is used to record the images that are created.
Nuclear medicine uses very small amounts of radioactive materials (radiopharmaceuticals) to diagnose and treat disease. It uses computer technology to provide doctors with information about both structure and function.