01 / MAGNETIC RESONANCE
MRI
MRI uses a strong magnetic field and radio waves, not ionizing radiation. It can provide detailed views of organs, joints and other soft tissues.
Before you go: discuss implants or metal, claustrophobia, possible pregnancy and any previous contrast reaction. Ask whether your particular exam needs contrast or other preparation.
MRI patient information · ACR / RSNA ↗
02 / COMPUTED TOMOGRAPHY
CT
CT combines x-ray measurements into cross-sectional images. It can help evaluate organs, bones and blood vessels; some examinations use IV or oral contrast.
Before you go: ask about contrast and preparation. Tell the team about possible pregnancy, kidney problems or a previous contrast reaction.
CT patient information · ACR / RSNA ↗
03 / SOUND WAVES
Ultrasound
Ultrasound uses sound waves to create images without ionizing radiation. Depending on the exam, it can show organs, soft tissues and blood flow.
Before you go: preparation varies. Some examinations need fasting or a full bladder; use the instructions provided for your specific appointment.
Ultrasound patient information · ACR / RSNA ↗
04 / RADIOGRAPHS
X-ray
X-ray examinations use ionizing radiation to create images. Bone and joint x-rays are commonly used to evaluate injuries, alignment and other skeletal concerns.
Before you go: tell the team if pregnancy is possible or if positioning is difficult. The requested body part and views determine how the exam is performed.
Bone x-ray information · ACR / RSNA ↗
05 / BREAST IMAGING
Mammography
Mammography uses low-dose x-rays to examine breast tissue. Screening and diagnostic examinations serve different purposes. A new symptom should be discussed with the clinical or imaging team rather than treated as a routine screening request.
Before you go: ask about the right appointment type and transferring earlier breast images for comparison.
Mammography information · ACR / RSNA ↗
06 / BONE HEALTH
Bone density / DXA
A DXA scan uses a low dose of x-rays to measure bone mineral density, commonly at the hip and spine. The result helps the clinician assess bone health and fracture risk.
Before you go: ask about comparison with previous scans and any instructions involving supplements or recent contrast examinations.
Bone density information · ACR / RSNA ↗