Magnetic acquisition, removing the noise and increasing the accuracy

Magnetic
resonance imaging (MRI) is one of the most powerful and effective tool in the field
of medical imaging. The medical visual diagnostic is very important and widely
used in the analyses of the human health and diseases. Storage or reproduction
phases of processing, acquisition, preprocessing, compression, and transmission
are responsible for degradation of MRI. After the acquisition, removing the
noise and increasing the accuracy of the clinical diagnostic system,
post-processing, de-noising, and enhancement techniques are suitable
alternatives. The Gaussian noise distribution is transformed into a Rician
noise distribution in order to transform the MR image from complex to magnitudeThe
main reason of that is the unavoidable presence of noise and a variety of
artifacts in the medical images. This justifies our research and observation of
the filtration?s methods of one of the widely used medical imaging – MRI.

MRI
is primarily used to demonstrate the pathological or other physiological alterations
of living tissues. It provides information that differs from other imaging
modalities such as ultrasound and computed tomography (CT). Its major
technological advantage is that it can characterize and discriminate among
tissues using their physical and biochemical properties.

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MRI
produces sectional images of equivalent resolution in any projection without
moving the patient. The ability to obtain images in multiple planes adds to its
versatility and diagnostic utility and offers special advantages for radiation
and/or surgical treatment planning. MRI is limited only by its spatial
resolution and long imaging times.

The
inherent exibility of MRI also permits its application in many clinical tasks
other than imaging static anatomy. Recently, the important applications have
been proposed including imaging blood vessels without contrast agents,
measuring diffusion in tissue, measuring tissue temperature, cardiac imaging,
dynamic imaging of the musculoskeletal system, liver and reticuloendothlial
system. In fact it has a various advantageous features, such as high-resolution
capability, the ability to produce an arbitrary anatomic cross-sectional
imaging, and high tissue contrast. Unfortunately, there are many potential
sources of image artifacts associated with the technology of MRI.