Before we begin: Diagnostic imaging refers to medical tests that create pictures of the inside of the body. They help providers understand health problems and make decisions about care.
This tutorial walks you through everything you need to know about diagnostic imaging. We explain it in plain language, step by step, so whether you are a student, a patient, or simply curious, you will come away with a solid understanding.
We cover what it is, why it matters, how it is diagnosed, and what you can do about it. Key facts are called out along the way.
What is diagnostic imaging?
Diagnostic imaging refers to medical tests that create pictures of the inside of the body. These pictures help your health care provider see your organs, bones, blood vessels, and tissues. Imaging tests can help find the cause of symptoms, detect disease early, monitor an illness or injury, and guide treatment.
What are different types of diagnostic imaging?
Different machines are used to create pictures inside your body. The type of imaging your provider uses depends on your symptoms and the part of your body being checked.
Common types of diagnostic imaging include:
X-rays
CT (computed tomography) scans
Nuclear medicine scans
MRI (magnetic resonance imaging) scans
Ultrasound
Why is diagnostic imaging done?
Diagnostic imaging tests help providers understand health problems and make decisions about care.
These tests may be used to:
Find health problems early
Learn what causes pain or other symptoms
Plan treatment
Monitor a condition or see how well treatment is working
Some imaging tests can also help guide medical procedures, such as placing catheters, stents, or other medical devices inside the body.
How is diagnostic imaging done? Each diagnostic imaging test is different, but many follow similar steps.
During an imaging test:
Some tests require you to change clothes or remove metal items, such as jewelry or glasses
Some tests require you to fast (not eat or drink) or drink contrast material (a substance that helps some parts of your body show up more clearly on the images)
Many imaging tests take only a short time
Some tests require you to stay still inside an imaging machine, which may feel uncomfortable
Some tests use a small amount of radiation
Always tell your provider if you are pregnant or think you may be pregnant.
After most imaging tests, you can return to normal activities right away. A specialist called a radiologist reviews the images and shares the results with your provider.
Also known as: Imaging.
Categories: Diagnostic Tests.
Source: National Institutes of Health — National Institute of Biomedical Engineering and Bioimaging.
Key Takeaways
Understanding diagnostic imaging is an important part of taking charge of your health. Here is what to remember:
- Know the signs — Recognizing early symptoms can lead to earlier diagnosis and better outcomes.
- Talk to your provider — If you have concerns or a family history of this condition, bring it up at your next checkup.
- Stay informed — Medical knowledge evolves. Keep learning and asking questions.
- You are not alone — Many people deal with this condition. Support groups and educational resources can help.