General annual physical examination that many people have had before. There may be blood tests, urine or stool tests, chest x-rays, internal exams, or there may be an ultrasound to check the liver. Electrocardiogram and internal examination to check for cervical cancer But there is also another type of examination called an MRI that is not included in the general annual physical examination package. Because it is a more detailed examination than normal. And yes only when it is really necessary to check.
What is an MRI?
MRI, an abbreviation for Magnetic Resonance Imaging, is an examination using a machine that creates images using an electromagnetic field. Used to diagnose patient’s lesions. to be used in treatment and follow up on treatment results It relies on the magnetic properties of hydrogen atoms (Hydrogen, H), which is the main component within the human body, such as water molecules (H2O), etc.
When the recipient is subjected to an electromagnetic field The device emits radio waves of a specific frequency. (Radiofrequency) stimulates the organ system to be examined. When that organ is stimulated, there will be a change in energy level according to a physical process called resonance. After hydrogen stimulation stops, Atoms within the body release energy. There will be a device to receive the signal that comes out. Then convert it into an image signal on the monitor.
How to examine the body with an MRI
To have an MRI scan, the patient must lie down in the machine. Tunnel-like which will be approximately 60 centimeters wide and will include an image signal receiver device It will have different characteristics. It depends on the organ system that needs to be examined. such as examining the brain system There will be an image signal receiving device covering the head area. In the ทางเข้า ufabet https://ufabet999.app case of spinal examination The imaging device is placed behind the patient, for example. The patient must lie in the tunnel for at least 30 minutes to an hour, depending on the organ system being examined.
The examination will be divided into series. Each set takes approximately 3-5 minutes for some tests, such as the heart and abdominal systems. The patient must hold their breath. Each set takes approximately 15-20 seconds and will require specific preparation. and refraining from taking certain types of regular medicines Before receiving the examination The staff will inform you of the steps on the day of the inspection appointment.
Advantages of MRI
- It can provide images that clearly differentiate between different tissues. It is a diagnostic test that is highly accurate and precise because it allows for good tissue differentiation. Can be done in many planes
- Can be used to check every system of the body. Especially in non-bony parts, which are soft tissues such as the brain system and the spine. Nerves in the body (muscles, tendons, etc.)
- An MRI scan provides better details than a computerized tomography (CT) scan.
- There are many special examination techniques, such as examinations for patients with acute ischemic stroke. Biochemical level determination To separate the types of lumps and examination of blood vessels throughout the body, etc.
- Does not cause any pain to the patient’s body Including no danger from residual radiation. Because there is no risk of injecting contrast material and catheterizing to inject the dye. Therefore has higher safety.
- Very useful in examining pediatric patients. Because there is no danger from radiation. caused by the use of x-rays
Disadvantages of MRI
- The cost is higher than other types of testing.
- One MRI scan examines one organ system. such as brain examination It shows an image of brain tissue. and other organs in the brain area will not be able to see organs in the chest or abdomen Therefore, each inspection You must be examined by the treating doctor before undergoing the MRI examination. The doctor will write a referral form specifying which organs you want to examine. along with the patient’s physical examination and treatment history which is necessary for radiologists In interpreting MRI images, it is used.
What can an MRI detect?
- head
Find brain abnormalities and nerves in the brain
- chest
Look for abnormalities in the breast and heart area.
- Abdomen and pelvis
Look for abnormalities in various organs in the abdominal cavity, uterus, and ovaries in females. prostate gland in males
- Bones and joints
Find bone abnormalities spinal nerves and spine
- blood vessel
Check the blood vessels and blood flow
Precautions for using MRI services
- If you are a person who is afraid of being in tight spaces You should inform your doctor.
- MRI scans should be avoided if metal is implanted in the body, such as those who have surgery to insert a clip to block an artery in an aneurysm (old style), metal plates and those who have bone splints. People who have artificial joint replacement artificial heart valve insert a pacemaker or implanting other medical devices that has metal components Including braces. (For those who need to undergo an MRI examination of the head to neck area)
- Take off the jewelry. All personal items must be removed from the body. Also remove makeup that may contain metal, such as eyeshadow or mascara. because it affects the examination that may cause a reaction to make the examination image unclear
This is because it is a rather detailed physical examination. Take some time And only a portion can be examined, so undergoing an MRI examination is necessary in order to find the true cause of each disease. Each part of the body only in certain cases, for example, CTScan or ultrasound cannot see clearly, etc. Therefore, if you want to use the MRI service, the doctor must decide that it is necessary to undergo an MRI examination, and the cost is more. normal Patients are asked to consult with the doctor about their rights to receive good treatment before receiving services (around 8000-12,000 baht per time per 1 organ in the body).