I. The RM provides images of the human body of a high quality information value in any anatomical plane or in space in three dimensions and a wide range of information to explore as a "signal", the magnetic properties of the material. I. The MR is an imaging technique is very versatile and sophisticated.

It uses a special machine with a powerful magnet (tens of thousands of times the geomagnetic field), an antenna for transmitting and receiving radio waves, which is similar to radar, a powerful computer, etc.. Used against powerful magnets, they can impose indications. In other cases, it is a consideration particularly well tolerated, feasible and without hospitalization for invasive testing, or to avoid danger. IndicationsI.R.M. are constantly increasing.

INDICATIONS

I. The RM applied to the whole body, most often in studies of first-line imaging (radiology, ultrasound, CT). Especially for soft tissues, MRI is more significant than the scanner. The main indications are:

- The diagnosis and monitoring of diseases of the central nervous system in the brain, pituitary, optic tract, etc.. ; The spine and its contents neurologic (spinal cord and roots). In developed countries 70% of the image of the brain and spinal cord MRI performed either in addition or as first-line scanner. In particular, the Angio-I. RM tends to replace cerebral angiography for myelography, discography and other invasive procedures;

- The diagnosis of certain diseases (especially cancer, infection, necrosis) and joint (meniscal tears and knee ligament injuries of the shoulder), the soft tissues of the members;

- Sony VGP-BPS13 battery Applications and specialized cardiovascular (ARM) digestive applications, primarily in the liver and bile ducts (MRCP) application to diseases of the kidney and urinary system, diseases of the prostate and genital mutilation, disease breast;

- In obstetrics, I. RM fetus is constantly changing and is part of a record for imaging suspected fetal abnormalities by ultrasound was still the first line.

PRINCIPLE

During the investigation, the body tissues are exposed to a strong magnetic field. They contain all the protons are oriented in the same direction, then. In a second step, the protons to undergo stimulated by an electromagnetic wave of radio wave type, then they come into resonance with the wave and switch together in the same angle. In a third step, the radio wave is abruptly interrupted, the protons in their starting point (relaxation time) by transmitting an electromagnetic wave, wherein the resonance by receptors collected and recorded. Computer analysis of collected wave form an image, where the density of each point on the basis of received waves, so that the density of protons in the tissue at this point. It only takes a few milliseconds.

BEHAVIOR

I. The RM program is easy to implement, without elaborate preparation, or hospital stay.

In preparation for the exam, the patient is allowed and encouraged to undress completely - without guards, credit card, etc.. - And put a bathrobe. It is in the examination room where the MRI machine introduced and installed in a horizontal position (usually at the back) on the bed that slides into the opening of the machine. The antenna is matched to the anatomical region of interest: for the head is like a helmet with a mirror shaped to collect ambient light. The center is realized. The review can begin.

The patient is warned to stop, the machine makes noise (offset by earplugs), the team of MRI is still in contact with him and visit him if necessary.

On the other side of the glass, the team I. The RM program requirements for the implementation of the review. Is the anatomical area in several steps (sequences) were examined, the images are captured and displayed on monitors. Sometimes it takes the specification of an intravenous injection of gadolinium, a contrast ratio of specific MRI

RESULTS

The images are reproduced on film, paper or CD-ROM. The account requires an interpretation of time. It includes descriptions of aspects of imaging (anatomical information, the information signal of each sequence, artifacts) and the results of diagnostic imaging (which is normal, this is not what we learned for diagnosis or monitoring of a disease).

Cons-indications and side effects

Due to the strong magnetic field used in MRI, it may interfere with magnetizable metals and hazardous or harmful. Therefore, it is necessary to examine systematically surgical history, and history of trauma with wound (s), is a metallic element is introduced may be in the body, but also on some devices such as hearing auditory, external pacemakers, piercings and tattoos, etc.. inquire

Some materials are cons-indications. This is usually the case of pacemakers (heart cells), neurostimulators, and any electronic device, equipment or magnetizable magnetic material such as neurosurgery (clips, valves), some heart valves, the basements of the filters. It is also the case of metal fragments in workers accidentally discarded metals, especially with the risk of blindness by moving a metallic foreign body eye.

Some metallic materials-cons do not suggest that MRI can interfere with the more or less its realization through the objects they cause an investigation in the region. This is the case and internal fixation, prosthetics, orthodontics certain equipment or prostheses, surgical clips.

I. The R.M. has its limits. The total immobility in the machine is necessary for half an hour. This is a limitation that makes testing more difficult in children, the issue of anxiety, agoraphobia, or shaken brands. Sedation can sometimes be made available. Excess fat may not be compatible with the opening of the machine. Finally, delays in appointments are in connection with the limited number of devices and the cost of important test.

No risk to the magnetic field is not currently known, including pregnant women. I. The RM caused no radiation in contrast to the scanner.

Bussiness news:

Dell Inspiron 1525 Battery 

Dell Inspiron E1405 Battery