Magnetic Resonance Imaging (MRI) has been used for over four decades to provide detailed images of the body. Many wonder, does MRI use radiation? MRI does not use harmful ionizing radiation. Instead, it uses safe radiofrequency waves, a type of radiation commonly found in everyday life that doesn’t harm the body.
At Stat Specialty Hospital, our advanced on-site imaging services offer quick, radiation-free MRI scans to help diagnose a variety of conditions safely and effectively. In this blog, we’ll explore how MRI works, the types of scans available, and important benefits and risks to consider.
How Does an MRI Work?
MRI technology uses a strong magnetic field that you won’t feel, which causes protons in your body’s hydrogen atoms, mostly found in water, to align in the same direction. Since the human body is about 60% water, this alignment is widespread. Next, radio waves are sent through the body, temporarily disturbing the alignment of these protons. When the radio waves stop, the protons release energy as they return to their original position. This energy is detected by a computer and transformed into detailed 3D images of your body’s tissues. Different tissues show up distinctly on MRI scans, helping doctors identify abnormalities with high precision.
What Happens During the Scan?
- MRI scans are non-invasive and painless.
- They use magnets and radio waves, not ionizing radiation, making them safe.
- Scans can be done with or without contrast dye (usually gadolinium).
- If needed, contrast dye is injected into a vein to enhance image quality.
- Many soft tissues can be seen without contrast.
- During the scan, you lie on a cushioned bed that slides into the MRI machine.
- The scan typically takes 15 to 90 minutes, depending on the area examined.
- A radiologist reviews the images afterward and sends a report to your doctor.
- Your doctor will discuss the results and next steps with you.
What Can an MRI Be Used For?
MRI scans are especially effective at imaging soft tissues and can examine many areas of the body, including:
- Brain and Spine: Detect strokes, aneurysms, multiple sclerosis, and tumors.
- Pelvic and Abdominal Organs: Evaluate kidneys, liver, pancreas, bladder, prostate, ovaries, and uterus.
- Bones and Joints: Diagnose joint or tendon injuries and bone tumors.
- Lungs and Heart: Identify structural or functional issues, tumors, and diseases.
- Other Soft Tissues: Assess muscles, ligaments, tendons, and nerves.
- Breasts: Dedicated breast MRI using specialized coils for detailed imaging when needed.
While most MRI scans diagnose existing conditions, whole-body MRI screenings are also available for asymptomatic individuals. These scans, like Ezra’s full-body MRI, can detect issues such as cancer early, before symptoms develop.
What Are the Different Types of MRI Scans?
There are several types of MRI scans designed to meet various diagnostic needs:
- Traditional MRI: Can be performed with or without contrast dye, focusing on a specific body area like the brain or abdomen, or as a full-body scan.
- Breast MRI: Uses a special breast coil to capture clearer images of breast tissue.
- Functional MRI (fMRI): Maps brain activity by detecting changes in oxygen use during cognitive tasks.
- Magnetic Resonance Angiography (MRA): Visualizes arteries and blood flow.
- Magnetic Resonance Venography (MRV): Focuses on veins and their blood flow.
- Open MRI: Features magnets above and below the patient instead of a full circle, ideal for those with claustrophobia, though it provides lower image resolution and longer scan times.
Each type serves a unique purpose to help doctors diagnose and monitor various conditions with precision.
Are There Any Risks When Having an MRI?
There are no known health risks from temporary exposure to the magnetic fields used in MRI scans. However, certain factors should be considered before undergoing an MRI.
Pregnancy:
MRI scans during pregnancy should only be done when necessary and after consulting with a healthcare provider. Non-contrast MRI scans are preferred, as MRI and ultrasound are considered safer imaging options for pregnant women.
Allergic Reactions:
Though rare, some people may be allergic to the contrast dye used in certain MRI exams. If you have a known allergy, inform your healthcare team beforehand. Possible reactions include dizziness, difficulty breathing, rash, nausea, or vomiting.
Metal in the Body:
Because MRI uses powerful magnets, patients must disclose any metal implants or objects before the scan. This includes body piercings, insulin pumps, pacemakers, cochlear implants, metal fragments (like shrapnel or dental bridges), and implantable defibrillators. Metal that cannot be removed may prevent you from having an MRI or require special precautions.
Claustrophobia:
MRI machines can feel confining as you lie on a bed that slides into a narrow tube. If you experience claustrophobia, speak with your doctor or technologist ahead of time. Sedatives or open MRI machines (which have a more open design but lower image quality and longer scan times) may be options.
Need to Lie Still:
MRI scans usually last at least 15 minutes, and you must remain still to get clear images. If staying still is difficult, let the technologist know; they can provide guidance or assistance.
Noise:
MRI machines can be loud. Earplugs or headphones with music, audiobooks, or podcasts are often provided. You’ll be able to communicate with the technologist through a microphone during the scan.
Children:
For children, special arrangements can be made to ease anxiety, such as virtual MRI tours or movies during the scan. Some centers also offer child-friendly MRI machines designed to make the experience more comfortable.
MRI as a Safe Form of Imaging
MRI uses powerful magnets and radio waves to produce detailed images of your body’s organs and tissues. Does MRI use radiation? It does not use harmful ionizing radiation, only safe radiofrequency waves, which are commonly found in everyday life. When performed without IV contrast, MRIs are non-invasive and excel at visualizing soft tissues. Full-body MRI scans are a valuable screening tool to detect abnormalities early, often before symptoms develop, which is crucial in fighting diseases like cancer. An Ezra Full Body MRI takes about an hour, with results available within 5-7 business days. You can also discuss your report with a healthcare provider through a telehealth consultation. Take control of your health today by scheduling your scan.
Safe MRI Imaging at STAT Specialty Hospital
At STAT Specialty Hospital, we prioritize your health and safety. Our state-of-the-art MRI services utilize strong magnetic fields and radio waves, free from harmful ionizing radiation, to provide detailed images of your body’s internal structures. With on-site imaging capabilities available 24/7 across our Del Rio, Eagle Pass, and Laredo locations, we ensure timely and accurate diagnostics. Whether you’re seeking emergency care or proactive health screenings, our compassionate team is here to support you every step of the way.