An MRI, magnetic resonance imaging, is a special type of diagnostic scan that creates a 3-dimensional image of internal body parts. This image is clearer than that of CT scans or X-rays, making them more reliable when it comes to diagnosing complex conditions. In order to pull off something this intricate, MRI scans are also known for taking a longer time than other scans. While the average length is between 15 and 90 minutes, a range of factors will impact how long your MRI lasts. Read on to learn about what to expect during an MRI.
How an MRI Works
First, it is important to understand how an MRI works to understand why it may take a long time. MRIs rely on a combination of strong magnetic fields and radio waves. The machine sends short bursts of radio waves through your body that the MRI machine captures to create an image.
This process happens repeatedly, with each time creating a cross-sectional image of one slice of your body. All these slices are then combined by a computer to create a comprehensive, 3D picture of the scanned body part. The precision of these images allows healthcare providers to diagnose and evaluate various conditions with great accuracy, ranging from torn ligaments to tumors.
Plus, the entire MRI process is non-invasive and does not involve radiation, making it a safer alternative for detailed internal imaging compared to other methods like X-rays or CT scans. However, the detailed nature of the images and the need to capture multiple slices mean that the scan can take a longer amount of time to complete, depending on the complexity and requirements of the scan.
Factors to Consider
MRIs can be done in many ways, all of which can impact how long the procedure takes. Some of these factors that affect duration include:
- The Number of Images: More images may be necessary for a more detailed analysis, which will require the scan to last longer. For instance, a simple scan might take 20 minutes, while a more comprehensive one might take up to an hour or more.
- The Part of the Body Being Scanned: Generally speaking, the larger the area of your body that needs to be scanned, the longer it will take to create a full picture. Scans of complex areas like the spine or abdomen may take longer than those of smaller, less complex areas like the wrist.
- Contrast Dyes: Some MRIs require contrast dye to be administered through an IV to add clarity to images of small structures in the body. This can add an extra 15 to 30 minutes to the process of an MRI. The contrast dye enhances the visibility of blood vessels, tumors, and inflammation, providing a clearer and more detailed image for diagnosis.
- Patient Movement: Any movement during the scan can blur the images, requiring additional time to retake the images. That’s why patients are often instructed to remain as still as possible, sometimes with the aid of support or restraints.
- Sedation: If someone is unable to stay still during an MRI, like a small child, or an adult who experiences severe claustrophobia, they may be sedated for the procedure. Administering a sedative and the time for it to set in can impact the length of the scan, as well as add time while the sedative wears off. However, this ensures the patient remains still and comfortable, which is crucial for obtaining clear images.
- Technical Factors: Different MRI machines have varying capabilities and speeds. Newer, more advanced machines may complete scans faster and with higher resolution compared to older models.
Understanding these factors can help set realistic expectations for the duration of an MRI scan and the preparation involved. By knowing what to expect, patients can better prepare for their appointments, and healthcare providers can ensure the process goes smoothly and efficiently.
What to Expect During an MRI
When you arrive for your scan, you will likely begin by verifying simple information like your medical history. They’ll also check you for easy-to-forget items that must be removed before the MRI and confirm you don’t have any metal implants or pacemakers that could prevent you from safely using the MRI machine.
Once you are ready, you will need to remove all metal from your body, including clothing. This may mean you change into a hospital gown, as well as removing any piercings, shoes, and hair ties with metal in them. This is also when contrast dye would be given if it’s being used.
During the MRI, you will lie on a bed that sits inside a large, cylindrical MRI scanner- essentially a large metal tube. There will be a speaker so that you can communicate with the person administering the scan, who will be in another room. They will tell you when they are about to capture an image so that you can be still and know to expect loud noises.
Each individual scan may take between seconds and a few minutes, and you may be asked to hold your breath for shorter scans. Immediately after the procedure, you will be able to leave and drive yourself, as long as you did not use a sedative.
FAQs of MRI Timing
How long does an MRI take?
The length of an MRI scan can vary depending on the part of the body being examined and the specific details of the procedure. On average, an MRI takes between 15 to 90 minutes.
How long does an MRI take for the head?
An MRI of the head typically takes around 30 to 60 minutes. The duration can vary based on the complexity of the scan and if any contrast dye is used.
How long does an MRI take?
A standard MRI scan can take anywhere from 15 minutes to 90 minutes. The exact time will depend on the type of MRI scan and the area of the body being imaged.
How long does a full spine MRI take?
A full spine MRI can take between 45 to 90 minutes. This is because the spine is a large and complex area, requiring detailed imaging.
How long does an MRI take on the brain?
An MRI of the brain generally takes about 30 to 60 minutes, depending on whether additional images or contrast dye are needed.
How long does an MRI take of the back?
An MRI of the back typically takes around 30 to 60 minutes. The time can vary based on the specific area of the back being scanned and the complexity of the images needed.
How long does a hip MRI take?
A hip MRI usually takes about 30 to 60 minutes. The time may vary depending on whether both hips need to be scanned or if contrast dye is used.
How long does a wrist MRI take?
An MRI of the wrist generally takes about 30 to 45 minutes. The duration can vary based on the level of detail required for the scan.
How long does a shoulder MRI take?
A shoulder MRI typically takes around 30 to 60 minutes. The exact time can depend on the specific details needed and whether contrast dye is used.
The Power of MRIs
If you are experiencing any pain or other symptoms, a doctor will not typically use MRIs as the first method of diagnosis. Initial diagnostic steps typically include physical examinations, blood tests, and simpler imaging techniques such as X-rays or ultrasounds. These methods can be enough for diagnosing common ailments and are quicker and more cost-effective. However, MRIs can be invaluable in diagnosing conditions that do not meet other criteria or to help rule out serious conditions. When symptoms persist or if initial tests are inconclusive, an MRI provides a more detailed look inside the body without the use of invasive procedures or radiation.
MRIs are particularly powerful in diagnosing the following:
- Neurological Conditions: MRIs are the gold standard for imaging the brain and spinal cord. They can detect abnormalities such as tumors, strokes, multiple sclerosis, and other conditions that affect the nervous system.
- Musculoskeletal Disorders: For injuries and conditions involving muscles, ligaments, cartilage, and bones, MRIs offer detailed images. This includes diagnosing tears, fractures, arthritis, and other degenerative conditions that might not be visible on X-rays.
- Cardiovascular Issues: Cardiac MRIs provide detailed images of the heart and blood vessels, helping in the diagnosis of conditions such as aneurysms, heart defects, and blockages in blood vessels.
- Abdominal and Pelvic Conditions: MRIs are useful for imaging organs within the abdomen and pelvis, including the liver, kidneys, uterus, and prostate. This can help diagnose tumors, infections, and other abnormalities.
- Cancer Detection and Monitoring: MRIs can detect the presence and progression of tumors and are often used in conjunction with other diagnostic tools to monitor the effectiveness of treatment.
Your doctor may recommend an MRI thanks to the comprehensive information provided that can inform a treatment plan precisely tailored to your condition. This level of detailed imaging allows doctors to:
- Prevent Misdiagnosis: By providing a clear and detailed view of the body’s internal structures, MRIs help reduce the risk of misdiagnosis and ensure that serious conditions are not overlooked.
- Plan Surgical Interventions: Detailed MRI images help surgeons plan procedures more accurately, potentially leading to better outcomes and reduced recovery times.
- Monitor Disease Progression: For chronic conditions, regular MRIs can track changes over time, allowing for adjustments in treatment plans as needed.
- Evaluate Effectiveness of Treatment: Post-treatment MRIs can help determine whether a particular treatment is working, such as the shrinking of a tumor or the healing of an injury.
AICA College Park for MRIs and More
At AICA College Park, our onsite diagnostic imaging allows us to request, perform, and analyze MRI scans easily without referrals and multiple appointments. Our specialists can then use this information to create personalized treatment plans easily and within a single team focused on your recovery. Contact us today with any questions about what an MRI may look like in your case.