When foot or ankle pain, an injury, or another condition needs a closer look, advanced imaging such as Magnetic resonance imaging (MRI) can provide important information that may not be visible during a physical examination or on an X-ray. This article explains what an MRI scan is, what conditions it can help diagnose, and how it differs from other types of imaging.
If you need diagnostic imaging for a foot or ankle concern, contact Orthopaedic Associates of Zanesville to schedule an appointment.
Magnetic resonance imaging, commonly called an MRI, is an advanced form of biomedical imaging that uses powerful magnets and radio waves to create detailed digital images of structures inside the body. Unlike an X-ray or CT scan, an MRI does not use ionizing radiation.
During an MRI scan, you lie on a table that moves into an MRI scanner. The MRI machine creates a temporary magnetic field around your body and uses radio waves to produce images. The scanner may make loud tapping or knocking sounds during the exam, so you may be offered music or other ways to improve your comfort.
Most MRI exams are painless. A typical exam may take about 20 to 25 minutes, while more involved studies can take up to an hour.
An MRI can create highly detailed images of soft tissues and other structures. For foot and ankle concerns, an MRI may help evaluate:
MRI is also widely used to examine the brain and spinal cord, blood vessels, and other parts of the body. For example, a brain MRI can help evaluate multiple sclerosis, certain spinal cord conditions, and other nervous system disorders. Specialized studies such as functional MRI can evaluate brain activity and assist with brain mapping.
Depending on the body part being examined, MRI can also be used for a liver MRI, cardiac MRI, or breast imaging. Breast MRI may be used in specific circumstances to help detect breast cancer, including when additional imaging is needed. MRI may also help detect aneurysms and evaluate blood flow through certain blood vessels.
X-rays and CT scans use X-rays to create images. An MRI instead uses a magnetic field and radio waves, so it does not expose patients to ionizing radiation.
CT scans can be especially useful for quickly evaluating certain fractures and other conditions, while MRI generally provides greater detail of many soft tissues. The appropriate imaging test depends on the patient’s symptoms, medical history, and the structures that need to be evaluated.
The Radiological Society of North America (RSNA) provides educational information about MR imaging and other diagnostic technologies.
For most MRI exams, you may eat and drink normally unless you are given different instructions. To prepare:
MRI safety is important because the MRI scanner contains powerful magnets. Patients should always disclose implants or metal before entering the scanner area.
A wide-bore or open MRI may be more comfortable for some patients who are concerned about enclosed spaces. Orthopaedic Associates of Zanesville uses a wide-bore MRI opening designed to provide added comfort.
Sometimes, contrast material is used to make certain tissues or abnormalities easier to see. Gadolinium contrast is commonly used for specific MRI studies and is given through an injection.
Contrast dye is not required for most MRI exams. When it is recommended, your healthcare team will review the reason for using contrast and any relevant medical considerations. Patients with significant kidney problems may need additional evaluation because certain gadolinium-based contrast agents have been associated with a rare condition called nephrogenic systemic fibrosis.
After a contrast-enhanced MRI, drinking additional water may be recommended. If you develop unexpected symptoms such as trouble breathing, hives, dizziness, or chest or throat tightness, seek immediate medical attention.
There is generally no special post-procedure care after a non-contrast MRI. You can resume activities as directed by your physician.
After the MRI, the images are reviewed by an appropriately trained radiologist, and the MRI results are provided to your healthcare provider. Your provider can then discuss what the findings mean and whether additional evaluation or treatment is appropriate.
If you are experiencing ongoing foot or ankle pain or have an injury that needs further evaluation, Orthopaedic Associates of Zanesville provides modern diagnostic imaging services in Zanesville, Ohio. Contact us today to schedule an appointment and discuss whether an MRI may be appropriate for your condition.
An MRI scan itself is not painful. You will need to remain as still as possible while the images are created. The position required during the exam may cause some discomfort if you already have pain.
A typical MRI exam takes approximately 20 to 25 minutes. More involved examinations may take up to an hour.
For most MRI exams, patients may eat and drink normally unless their healthcare provider gives different instructions.
Some metal objects and implants can affect MRI safety. Always tell your healthcare team about implants, metal clips, cochlear implants, pacemakers, defibrillators, or other metal before an MRI.
No. Most MRI exams do not require contrast material. Contrast may be recommended when it can provide additional information or improve the visibility of certain structures.
