Pasquantonio M Valentina DDS in Sudbury, Massachusetts

Medical imaging is a powerful tool, and for most people the benefits of a needed scan outweigh the small radiation risks. This article explains which tests use ionizing radiation (X‑rays, CT scans, nuclear medicine) versus those that don’t (MRI, ultrasound), how cumulative exposure works, and why children and pregnant people require extra caution. It offers practical steps to stay safe—ask if the result will change your care, whether a non‑radiation alternative is suitable, if prior images can be used instead of repeating a test, and whether the facility follows dose‑reduction standards (ALARA) and is accredited. You’ll also learn how to keep a personal imaging record and discuss your individual risk–benefit balance with your clinician. The key takeaway: medically necessary imaging is generally safe, and informed choices can further minimize risk while ensuring you get the diagnostic answers you need.