Mr angiography of brain vessels and neck
All processes in human organism are under the control of the brain. To ensure its effective operation, a prerequisite is an adequate blood supply. This is because brain tissue requires a large amount of oxygen and nutrients, and reduced delivery of blood to the brain leads to the deterioration of his work. This affects the health and condition of the body.
One of the methods of research of a condition of cerebral arteries is magnetic resonance angiography – a method based on the phenomenon of nuclear magnetic resonance, and allow you to track the nature of blood flow in the vessels of the brain.
Despite the safety of the method MRI, his conduct is shown not to all. Contraindications include:
- Mental disorders in patient – Mr-procedure requires prolonged immobility. It is a relative contraindication, as it is possible to use anesthesia in the case when appropriate.
- Cardiac insufficiency, hepatic and renal decompensation.
- When using contrast – allergic to it.
- Disorders of blood clotting.
- Implanted cardiac pacemaker – Mr MRI scanner is a giant magnet, its electromagnetic field will cause interruptions in the operation of the device.
- The presence in the body of metal objects, needles, prostheses, braces, implants.
- The first trimester of pregnancy.
That shows Mr angiography?
Using magnetic resonance angiography to evaluate the nature of blood flow in cerebral arteries, veins, and capillaries. Mr-angiography can diagnose dangerous pathology:
- Aneurysms of the arteries, their location, size and condition of the walls.
- The dissection of the vessel wall or aneurysm.
- Vascular malformations.
- The presence of atherosclerotic changes in the lumen of the vessel.
- Localization of stenosis or occlusion of arteries and veins.
Why is Mr angiography?
MRI study is based on the property of hydrogen atoms to be excited under the influence of high frequency electromagnetic fields. In humans hydrogen is part of water molecules, so clearly visualized structure, which consist of water and aqueous solutions, with MRI angiography shows blood vessels and the nature of blood flow.
With the help of computer device embedded in the MRI scanner during the MRI creates a three-dimensional image of the vascular system of the brain. If necessary, separately assess the condition of the arteries or veins. With the help of three-dimensional images to investigate the blood supply of the brain over time and identify the smallest of pathology at a very early stage of development. The undeniable advantage of MRI studies is the ability to monitor the status of blood flow to the brain in stroke patients.
An important advantage of Mr angiography is that the research is conducted without the use of ionizing radiation, so this test can be performed any number of times without causing harm to the human body. The study is noninvasive, there is no need for the use of intravascular catheters.
Unlike angiography using catheters, MRI in angiooedema takes less time and requires no special recovery period.
On the MRI angiography clearly visible vascular malformation, aneurysm and stenosis. To study the vessels of the head and neck in most cases does not require the use of a contrast agent. Contrast is used to visualize tumors and metastasis is a contrast agent is able to «strengthen» the pattern of the capillary in the area of the tumor. A contrast agent is injected intravenously before MRI and allows to evaluate the smallest tumors, which are closed to large vessels.
Technique for Mr angiography
The conduct of Mr angiography do not differ significantly from conventional scan of the head and neck. The patient removes all jewelry and metal items, and lies on a special pull-out couch, which moves it to the camera imager. The scan takes approximately 30 minutes, the patient is required to maintain complete immobility. In the adjacent room is a specialist, who with the help of a special computer program that is configured to display the blood vessels of the brain and neck, assesses the nature of blood flow in the brain. If necessary, the patient can contact the doctor using an embedded device for communication.
In addition to the scanning of brain vessels placed great significance on the diagnosis of the condition of the vessels of the neck. This is due to the fact that the vessels of the neck is the only way to deliver blood to the brain, and the slightest breach of the blood flow through them causes serious lesions of nervous system. With the help of Mr in angiooedema possible to diagnose degenerative disc disease of the cervical spine is the most common reason for poor blood supply to the brain.
Magnetic resonance angiography of the brain vessels and neck – available method of diagnosis, allowing to identify serious diseases at an early stage of development and time to plan the treatment. Do not ignore the unpleasant symptoms, timely treatment for medical help will help to avoid serious consequences.