MRI of the inner and middle ear
The ear is a complex structure analyzer, which is responsible not only for the ability to distinguish between sounds, but also provides vestibular function (balance). The main analyzing part of the organ is located deep inside the temporal bone, therefore, is inaccessible to inspection by the eye or instrumental methods. Symptoms of disease of the auditory analyzer can be the same for different diseases, in this case, the otolaryngologists prescribe an MRI of the inner ear.
The fact that in ordinary life people call the ear is only the external locator intricate system that can recognize sounds and provides balance. MRI is virtually the only way to see the state of the system, which is located inside the temporal bone.
Suspect deafness in a child the parents begin not immediately, but after a few months lack of response to voice and other loud noises makes you go to the doctor.
To determine the cause of hearing loss resort to MRI, which allows to make a diagnosis even infants.
The anomaly can be unilateral in nature or be present in both ears.
Inflammation of the middle and inner ear, usually the ENT doctor can establish typical symptoms, therefore magnetic resonance imaging is required only in case of discrepancy of symptoms, course of illness, and in the absence of a positive effect of treatment.
Require MRI for diagnosis and complications of internal otitis. Side by side with brain and cranial nerves, the ears can become the cause of otogenny meningitis or abscess of the brain. Can otitis media cause inflammation of the cranial nerves (neuritis), causing prolonged and difficult to treat pathological processes.
Benign and malignant tumors of middle and inner ear MRI detects even in the early stages of the development process. Also, during the study, it is possible to estimate the prevalence of the process to adjacent organs and structures, allowing you to assign effective and timely treatment.
Diseases of the vestibular apparatus
The vestibular apparatus is responsible for orientation in space (equilibrium). Infringement of his work may manifest dizziness, nausea, not related to meals, fainting, tinnitus, and unsteadiness of gait. All the symptoms are not narrowly specific, and may be registered in various diseases of the nervous system.
In order to determine the cause of the vestibular symptoms, conduct an MRI. This not only helps differentiate vestibular disease from diseases of other organs, but also to establish the nature of the lesion (inflammation, tumor, etc.).
How is the procedure?
MRI in otolaryngology performed as well as MRI of the brain: the patient is laid on his back and placed inside the cylindrical part of the device, where it creates an electromagnetic field. During the study the patient should maintain a fixed position.
For better visualization of certain pathological conditions of the used contrast agent, which, gradually filling the vasculature, enhances the legibility of bodies. When contrast MRI is used on the basis of salts of gadolinium, which are excreted by the kidneys in unchanged form and bring no harm to the body. A contrast agent is injected into an arm vein before the procedure, bolus or during the exploration of the drip.
Contraindications to the study
- Implanted metal and electronic devices (apparatus Elizarova, clips on blood vessels of the brain, a pacemaker).
- Mental disorder.
- Significant excess weight.
- Severe General condition, not allowing it to be in the supine position for thirty minutes.
Small children study is performed under anesthesia.
If claustrophobia and severe obesity may be used open types of magnetic resonance imaging.
Metal prosthesis (joints, dentures, and implants) from inert metals are not a contraindication to the study, but can distort the result of the study, therefore their presence should alert the doctor in advance.
Preparation for the procedure
To conduct Mr tomographie ear does not require special training. You should think about clothing: it must not have metal parts: zippers, rivets, buttons, etc. should Not wear clothes with lurex.
Before the MRI you will have to remove watches, glasses, jewelry, dentures and plates.