How to Prepare for Magnetic Resonance Imaging
The main purpose of magnetic resonance imaging (MRI) is to determine the extent of the disease. MRIs are usually painless, although some patients may experience some discomfort during the procedure. A doctor who performs the tests will use a special machine that makes different noises. Sometimes, the noises are very loud. To alleviate discomfort, patients are provided with headphones so they can listen to music or movies. If the MRI is done in a hospital, a radiology technician will explain the procedure and how the images are formed.
While undergoing an MRI, patients must be completely still. Often, they will be required to wear earplugs to block out the noise of the machine. They should also contact the ordering physician to discuss any allergies to contrast materials. The physician will likely prescribe a medication that will help patients cope with the allergy. If the patient is concerned about their reaction, they should talk to their health care provider and let them know about their condition.
Before the MRI, the patient must wear undressed clothing. Metal objects can interfere with the MRI scan. Belts, earrings, glasses, and shirts with snaps or buttons will affect the scan. Undergarments will not be compatible with the MRI, so they should be left at home. The patient may also opt to wear a hospital gown instead of normal clothes. X-rays are a common way to identify illnesses.
Before undergoing an MRI, patients should discuss the risk factors involved. The process may be painful or uncomfortable for some patients. If an MRI is necessary, people should discuss their fears with a medical professional. Medications and anesthesia may be prescribed, or doctors may recommend the use of neurostimulators or other implants. A medical professional can also implant a device that will prevent the patient from feeling pain during the test. Deep brain stimulation may be implanted in the ear, and a filter may be inserted in the eyes.
MRIs use powerful magnets to produce a strong magnetic field that forces protons to align with the magnetic field. The radiofrequency current stimulates the protons, which then strain against the magnetic field and realign with the magnetic field. The energy released by the protons when they realign with the magnetic fields is detected by MRI sensors. The MRI scan takes about 30 minutes. The patient should wear headphones or earplugs.
In MRIs, radio waves create a magnetic field. The radiofrequency current sends these signals to a computer, where they are converted into 3-D pictures. A typical MRI will produce images that look like three-dimensional maps. Depending on the type of tissue being examined, MRIs may be used in a hospital or clinic setting. When used properly, MRIs can be a life-saving tool for patients.
MRIs use powerful magnets to manipulate the magnetic positions of the body’s molecules. The radiofrequency current stimulates the protons and then sends them back to their original positions. As they return, the protons will eventually realign with the magnetic field. The results of the scan will depend on the chemical makeup of the molecules. This process can take anywhere from 30 to 60 minutes. In most cases, the results will be sent to your doctor within the same day.
MRIs are painless. There are no side effects to MRIs. The technician will monitor the process for a few minutes. The images will be shown to your doctor and may contain a few different types of information. The results of an MRI will be discussed with the radiologist and with your doctor. A patient should not feel any pain during an MRI, but some people may find the noises uncomfortable. During an MRI, the patient will be placed in a chair that is placed above the head of the scanner.
An MRI is a noninvasive procedure. The procedure is painless, but you should not eat or drink before or after the scan. The MRI machine produces a magnetic field around the patient’s body, directing the radio waves to the body part being imaged. However, if you are pregnant, you should inform your doctor and make sure the baby is well-rested before the procedure. It is important to have the proper sensitivity and dosage.