In all fields of medicine, it is the most advanced and highest level imaging method among imaging methods. It stands for "magnetic resonance imaging" and is also written as MR or mrg. In spoken language, MR; It is popularly known as EMAR because it is pronounced as "emar".
The device, which provides a strong magnetic environment, records, evaluates and transfers the movements of hydrogen and neutron atoms, which are abundant in the water and fat tissue in the body, to the computer environment, thanks to radiofrequencies. creates an image. All tissues and organs in the body; By dividing it into sections and looking at it from different directions, pictures are taken and recorded in detail.
In what cases is it necessary to take an MRI?
Before taking an MRI, the physician of the relevant branch always listens to the patient, examines him/her and performs first-line routine examinations. Then, he writes a preliminary diagnosis or the reason and opinion for why he had an MRI scan and refers the patient for an MRI examination. The physician who requested the MRI, the radiologist, and the MRI technician must work in collaboration.
In almost all diseases and injuries of the musculoskeletal system, MRI examination may be necessary both in early diagnosis and diagnosis, in the treatment plan and in determining the future of the current problem. MRI scans can be performed for many situations such as detecting all joint problems, diagnosing and planning treatment of ligament and muscle injuries due to sports injuries, detecting problems such as tumors, hidden fractures and osteoporosis, and monitoring and evaluating repaired tissues after surgery.
In what cases should a person not be able to enter the MRI device and an MRI should not be requested?
Those with metallic vascular clips in the head, those with pacemakers, automatic rhythm regulating heart devices (automatic defibrillator and biostimulator), those who give some continuous medication and those who have implanted devices (infusion device), those who have internal hearing aids and those who have metallic foreign objects cannot enter the definitive MRI device.
In the first 3 months of pregnancy, middle ear prosthesis and penis These are situations in which prostheses should be taken into consideration and should not be removed unless necessary, and they are known as situations that partially hinder MRI imaging.
In general, patients with internal orthopedic devices and prostheses are They can safely enter the MRI device. However, in the presence of devices and prostheses containing iron elements, MRI images may be distorted or blurred. If there is a metal orthopedic device that is placed externally and is not compatible with the MRI, the person cannot enter the MRI device.
What should be done before coming to the MRI?
If the shooting will not be performed under anesthesia, there is no need to fast. Unless there is a special situation, there is no need to use or take any medication. There is no need for urinary urgency as in ultrasound.
However, if the imaging will be performed under anesthesia for babies or children, or for those with claustrophobia, preparation may be required as instructed by your doctor.
How is an MRI scan taken and what should be taken into consideration during the shooting?
The person entering the MRI machine should wear an MRI apron. The patient should not have any small or large metal objects on him. For example, necklaces, earrings, belts, keychains, etc.
Do not move during shooting to avoid image noise, especially in the area to be shot. In some shots, it may be necessary to hold your breath for a while upon the command of the technician.
How to take an Emar?
After the patient who will undergo MRI is inserted into the MRI device, a specially designed device called a coil with an antenna feature is placed in the area to be examined with MRI. Then, the technician ensures that the location to be shot remains stable by making adjustments so that it is right inside the device, and shooting begins. The imaging time varies depending on the magnetic strength of the MRI device, the update status, the number of shots, the area to be scanned and the condition of the disease, but it may take 15-45 minutes. With imaging devices with high magnet power (1 tesla and above is considered high magnet power), the imaging time takes a significantly shorter time.
What does the tesla power of an imaging device mean and What does it do?
Tesla describes the magnetic power of the MRI device, that is, the magnet power. Above 1 tesla is defined as high magnetic field, and below 0.3 tesla is defined as low magnetic field. While a low magnetic field is created in open imaging devices, a high magnetic field is created in closed imaging devices.
Tesla high power imaging device makes it possible to examine tissues and organs in thinner sections. It allows detailed imaging of small areas (e.g. jaw joint, hand, foot - ankle, internal organs such as heart, kidney, etc.). Shooting is done in a shorter time.
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