Magnetic resonance (eg, proton) imaging, lower extremity other than joint; without contrast material(s), followed by contrast material(s) and further sequences
CPT4 code
Name of the Procedure:
Magnetic Resonance Imaging (MRI) of the Lower Extremity (other than joint); without contrast, followed by with contrast
Summary
An MRI of the lower extremity uses magnetic fields and radio waves to create detailed images of tissues, muscles, and other structures in the leg. Initially, images are taken without contrast material; later, a contrast dye is injected to enhance image clarity for further sequences.
Purpose
This MRI procedure helps diagnose and monitor conditions affecting the muscles, bones, and soft tissues in the lower extremity. The primary goal is to provide high-resolution images that can reveal abnormalities or injuries.
Indications
- Persistent pain in the lower extremity
- Suspected muscle or soft tissue injuries
- Tumors or abnormal growths
- Vascular issues
- Evaluation of infections or inflammation
Preparation
- No food or drink for 4-6 hours before the procedure
- Inform the doctor of any allergies, especially to contrast material
- Remove all metal objects from the body
- Change into a hospital gown if required
Procedure Description
- The patient lies on a movable table that slides into the MRI machine.
- Initial images are taken without the use of contrast material.
- Contrast dye is then injected into a vein, typically in the arm.
- Additional images are taken to enhance the visibility of structures in the lower extremity.
- The patient must remain still during the imaging process to ensure clear images.
Duration
The procedure typically takes about 45-60 minutes.
Setting
Performed in a hospital radiology department or an outpatient imaging center.
Personnel
- Radiologist
- MRI Technologist
- Nursing staff (for contrast injection)
Risks and Complications
- Allergic reaction to contrast material (rare)
- Claustrophobia or discomfort from lying still
- Localized pain or bruising at the injection site
Benefits
- Non-invasive imaging technique with detailed results
- Helps in accurate diagnosis and treatment planning
- Enhanced imaging with contrast for clearer visualization
Recovery
- Observation for any immediate allergic reactions post-contrast injection
- Resume normal activities immediately unless otherwise advised
- Follow-up may be required to discuss findings
Alternatives
- X-rays (less detailed)
- CT scan (uses ionizing radiation)
- Ultrasound (less detailed and limited to certain tissues)
Patient Experience
During the procedure, the patient might feel coolness during the contrast injection and may hear loud noises from the MRI machine, for which earplugs are usually provided. The procedure is otherwise painless, and pain management measures are typically unnecessary.