However, you will be in constant sight of the technologist through a window. Speakers inside the scanner will enable the technologist to communicate with and hear you.
You will have a call button so that you can let the technologist know if you have any problems during the procedure. The technologist will be watching you at all times and will be in constant communication. You will be given earplugs or a headset to wear to help block out the noise from the scanner. Some headsets may provide music for you to listen to. During the scanning process, a clicking noise will sound as the magnetic field is created and pulses of radio waves are sent from the scanner.
It will be important for you to remain very still during the examination, as any movement could cause distortion and affect the quality of the scan.
At intervals, you may be instructed to hold your breath, or to not breathe, for a few seconds, depending on the body part being examined. You will then be told when you can breathe. You should not have to hold your breath for longer than a few seconds. If contrast dye is used for your procedure, you may feel some effects when the dye is injected into the IV line.
These effects usually last for a few moments. You should notify the technologist if you feel any breathing difficulties, sweating, numbness, or heart palpitations. Once the scan is complete, the table will slide out of the scanner and you will be assisted off the table. While the MRI procedure itself causes no pain, having to lie still for the length of the procedure might cause some discomfort or pain, particularly in the case of a recent injury or invasive procedure such as surgery.
The technologist will use all possible comfort measures and complete the procedure as quickly as possible to minimize any discomfort or pain. You should move slowly when getting up from the scanner table to avoid any dizziness or lightheadedness from lying flat for the length of the procedure.
If any sedatives were taken for the procedure, you may be required to rest until the sedatives have worn off. You will also need to avoid driving. If contrast dye is used during your procedure, you may be monitored for a period of time for any side effects or reactions to the contrast dye, such as itching, swelling, rash, or difficulty breathing. Otherwise, there is no special type of care required after a MRI scan of the spine and brain. You may resume your usual diet and activities, unless your doctor advises you differently.
Your doctor may give you additional or alternate instructions after the procedure, depending on your particular situation. Health Home Treatments, Tests and Therapies. MRI of the Brain, MRI of the Spine Magnetic resonance imaging MRI is a diagnostic procedure that uses a combination of a large magnet, radiofrequencies, and a computer to produce detailed images of organs and structures within the body.
How does an MRI scan work? Anatomy of the spine The spinal column, also called the vertebral or spinal canal, is made up of 33 vertebrae that are separated by spongy disks and classified into distinct areas. The cervical area consists of 7 vertebrae in the neck. The thoracic area consists of 12 vertebrae in the chest area. The lumbar area consists of 5 vertebrae in the lower back area.
The sacrum has 5 small, fused vertebrae. The 4 coccygeal vertebrae fuse to form 1 bone, called the coccyx or tailbone. Anatomy of the brain The central nervous system CNS consists of the brain and spinal cord. What are the different parts of the brain? The brain can be divided into the cerebrum, brainstem, and cerebellum: Cerebrum. More specifically, other parts of the brain include the following: Pons. What are the reasons for an MRI of the brain or spine?
There may be other reasons for your doctor to recommend MRI of the spine or brain. What are the risks of an MRI? How do I prepare for an MRI? When you call to make an appointment, it is extremely important that you inform if any of the following apply to you: You have a pacemaker or have had heart valves replaced You have any type of implantable pump, such as an insulin pump You have vessel coils, filters, stents, or clips You are pregnant or think you might be pregnant You have any body piercing You are wearing a medication patch You have permanent eye liner or tattoos You have ever had a bullet wound You have ever worked with metal for example, a metal grinder or welder You have metallic fragments anywhere in the body You are not able to lie down for 30 to 60 minutes.
What are the important differences? Why would your doctor…. A CT scan is a series of cross-sectional X-ray images of the body. Learn why a CT scan is performed and what to expect during a CT scan. Your doctor may find a choroid plexus cyst during a routine prenatal ultrasound. These cysts usually resolve on their own and rarely lead to….
Dysmetria is a lack of coordination caused by the cerebellum not functioning properly. Discover its causes and…. In the body there are two deep temporal arteries. These arteries are called the posterior and anterior deep temporal arteries. Theta brain waves are slower than gamma, beta, and alpha waves, but faster than delta waves. Your brain produces five different types of brain waves that move at a different speeds. Gamma waves are the fastest brain waves.
Your brain tends to…. Your medulla oblongata plays an essential role in passing messages between your spinal cord and brain. Health Conditions Discover Plan Connect. Head MRI. Medically reviewed by Seunggu Han, M. Why do I need a head MRI? How do I prepare for a head MRI? What is the procedure for a head MRI? What happens after a head MRI? Read this next. A head MRI is noninvasive. When a person arrives at the clinic, a doctor or technician will talk them through the process and tell them what to expect.
Radiographers also need to know if a woman is pregnant. Doctors tend not to recommend MRI scans during pregnancy, because it is unclear whether the magnetic force can affect fetal development.
They will also ask if a person has any metallic objects, such as piercings, metal plates, watches, or jewelry. These can interfere with the scan, and a person must remove them before entering the scanner. A healthcare team member will usually ask a person to put on a hospital gown. The technician will bring the person into the room that contains the MRI scanner. The person will lie on a sliding trolley, and the technician may cover them with a sheet.
They will leave the room and speak to the person through a radio. The medical team may offer anesthetics or sedatives to people who have extreme claustrophobia. If a person has taken a sedative, they should avoid driving themselves home. Also, a person needs time to recover from an anesthetic at the medical center. In the event of an allergic reaction, the healthcare team will keep the person under observation.
Several types of scanners can provide a head MRI. The size of the machine will depend on the purpose of the scan and whether the person has claustrophobia. Contrast is a magnetic substance. If a person drinks or receives an injection of contrast before a scan, it can help to improve the image. The majority of MRI scans do not require contrast. The doctor and radiologist will decide if contrast is necessary, and a person takes it orally or by injection.
Contrast travels to organs and tissue through the bloodstream. The MRI procedure is the same, whether or not it requires contrast. Contrast makes tissues and organs stand out on the MRI image. This can illuminate early abnormal tissue growth, including tumors. There is a small chance that a person may have an allergic reaction to contrast materials. Before administering the contrast, a doctor will ask about:.
After taking the contrast, a person should check for any side effects. Report any adverse effects to a healthcare provider. The radiographer will review and interpret the scans.
0コメント