Magnetic Resonance Imaging (MRI) (3TESLA)
What is MRI (Magnetic Resonance Imaging) / 3-Tesla MRI?
MRI (Magnetic Resonance Imaging) is a non-invasive, painless, and hospitalization-free advanced medical imaging technique that provides high-resolution images of the body using a strong magnetic field, radio waves, and advanced computer software. Unlike direct X-ray (radiography) and computed tomography (CT), it does not use ionizing radiation, making it a patient- and doctor-friendly method. In the near future, AI-supported MRI scans are expected to bring revolutionary advancements by increasing efficiency, reducing workload, and speeding up imaging processes. Artificial intelligence and machine learning contribute to scan planning, multi-dimensional data acquisition, clinical image interpretation, and personalized imaging.
An MRI machine consists of a cylindrical tunnel-shaped tube with powerful magnets inside, placed in a specially equipped scanning room. The highest image resolution is obtained at the center of the magnet, so the specific body part being examined must be positioned accordingly. To achieve this, the patient lies on a table that moves slowly, ensuring the target area is centered within the tunnel. To obtain clear and high-quality images, the patient must remain still during the scan, sometimes using belt-like stabilizers for support.
MRI allows for the examination of almost the entire body. The images obtained through advanced computer software provide crucial information for disease screening, diagnosis, treatment planning, and evaluating the effectiveness of previous treatments. Since it does not use ionizing radiation (X-rays), it is a preferred imaging method for conditions that require frequent monitoring.
The duration of an MRI scan varies depending on the size of the area being imaged and the number of slices needed, typically ranging from 15 to 90 minutes. Full-body MRI scans may take longer.
Generally, patients do not need to hold their breath during an MRI scan, making it advantageous for those with mobility restrictions, dementia, or hearing impairments.
MRI can also be used for biopsy and other interventional procedures. Thanks to the advanced features of our MRI devices, images are not limited to horizontal slices but can also be obtained in 3D, allowing for precise localization of lesions. This feature is crucial for biopsy and surgical planning.
If brighter and sharper images are needed, a contrast agent may be administered intravenously (IV). A doctor, technician, or nurse will place a catheter in the patient's vein if necessary. This decision is made by the referring physician or the radiologist evaluating the results.
As the strength of the magnetic field increases, the frequency difference between fat and water in the body expands. This feature enables specialized imaging techniques such as MR spectroscopy, functional MRI, diffusion MRI, and arterial spin labeling.
MRI is particularly advantageous in neuroradiology for imaging the brain and nervous tissue and evaluating their functions. Arterial spin labeling (ASL) allows perfusion MRI scans to assess brain blood flow without the need for contrast agents, making it especially beneficial for pediatric patients. Perfusion MRI can also evaluate the blood flow (perfusion) of various tissues, including the heart.
Higher resolution enhances the ability to detect small cartilage, bone, tendon, and ligament lesions in the musculoskeletal system. MR neurography and plexus imaging can also be successfully performed.
With 3-Tesla MRI machines, high-resolution contrast-enhanced and non-contrast MR angiography images can be obtained.
It enables the most accurate and up-to-date prostate diagnostic methods, such as multiparametric prostate imaging and fusion prostate biopsy.
For liver and breast diseases, the high signal strength allows for the early detection of even the smallest lesions.
Although rare, fetal MRI may be performed if deemed necessary by a physician.
In addition to these specialized imaging techniques, 3-Tesla MRI provides detailed assessments of the gallbladder and bile ducts, kidneys, spleen, pancreas, adrenal glands, uterus and ovaries, blood vessels, lymph nodes, and many other organs and tissues, making it an indispensable advanced imaging method in modern medicine.
At our institutions (Nişantaşı Centermed, Centermed Akademi, Centermed Plus, and Betemar), we offer same-day imaging services with four state-of-the-art 3-Tesla MRI devices equipped with advanced software and hardware, suitable for high-weight patients.
Is MRI Risky?
MRI scans are not risky; however, because they use a powerful magnetic field, any iron, steel, or other metal objects in the room can be subject to a strong attraction force. Even a wheelchair left in the room can be rapidly pulled into the machine, posing a serious safety hazard. Therefore, great caution must be taken. Experienced MRI technicians and support staff will inform patients of these risks before entering the scanning room and ensure all necessary precautions are taken.
How Should You Prepare for an MRI Scan?
First, consult your referring physician to understand why the scan is needed, its potential risks, and to address any concerns you may have.
For most MRI scans, you can drink water, eat, and take your usual medications. If any special preparation is required, you will be informed when scheduling your appointment.
Wear comfortable clothing without metal zippers, buttons, or hooks. You may be required to change into a disposable hospital gown provided by our institution.
Avoid bringing or wearing the following items: mobile phones, jewelry, watches, coins, keys, dentures, glasses, hearing aids, undergarments with metal wires, hairpins, pens, pocket knives, piercings, and wigs containing metal. If there is any suspicion that a patient has metal implants that could pose a risk, an X-ray may be taken beforehand. It is crucial to inform the technician about metal clips used for aneurysms, vascular coils, pacemakers, insulin pumps, cochlear implants, endoscopy capsules, intrauterine devices (IUDs), recently placed artificial joints, or any other metal-containing implants. The MRI technician will carefully evaluate these factors and consult with the referring physician if necessary. If any risk is present, the scan will not be performed.
Due to the nature of MRI imaging, you may hear loud noises during the scan. To minimize discomfort, ear protection may be provided, or you may be allowed to listen to music for relaxation.
If you have kidney failure, liver disease, or allergies, inform your doctor in advance. In such cases, the use of contrast agents may be reconsidered.