Magnetic Resonance Imaging Clinical Trial
Official title:
A Neonatal Bimodal MR-CT Head Template
This is a retrospective study based on the images contained in the database of the University
Hospital of Amiens. There is no further examination. Electroencephalography (EEG) and
Near-Infrared Spectroscopy (NIRS). These sources are widely used to specify the source of
certain evoked potentials or to better define the sources of epileptic graphoelements,
especially in the pre-surgical assessment of refractory epilepsies.
It is therefore important that these regions are more widely available in the constitution of
the world, and that they are suitable for use in the design of new technologies. Although MRI
is the gold standard for soft tissue segmentation, it is not suitable for bone extraction;
especially in the newborn or the bone is very thin. On the other hand, CTscan is an excellent
method for extracting bone. The contrast between bone and soft tissue is excellent. In this
case, with the CTscan, the fontanelles are identified as discontinuities between the images
of the temporal scales.
Magnetic resonance imaging (MRI) and brain scan (CT Scan) are the two main modalities of
structural brain imaging that are widely used in routine practice. The extraction of bone
from MRI and CTscan images is an important step in the segmentation of the different tissues
of the subjects' heads. It is indeed necessary to know precisely the electrical
characteristics (conductivities) and optical (absorption, diffraction) of tissues (skin,
bone, LCS, gray matter and white matter), or by electric currents or by photons. One of the
major problems is the one that is not very poorly visualized in MRIs in CTscan, the bone is
well individualized and that inversely the various brain structures are difficult to extract.
This justifies the fact of performing a coregistration of images obtained in MRI and CTscan.
The skull of the newborn is an inhomogeneous structure. The fontanelles are invisible in MRI
and identifiable in CTscan.
Electroencephalography (EEG) and Near-Infrared Spectroscopy (NIRS). These sources are widely
used to specify the source of certain evoked potentials or to better define the sources of
epileptic graphoelements, especially in the pre-surgical assessment of refractory epilepsies.
It is therefore important that these regions are more widely available in the constitution of
the world, and that they are suitable for use in the design of new technologies.
Although MRI is the gold standard for soft tissue segmentation, it is not suitable for bone
extraction; especially in the newborn or the bone is very thin. On the other hand, CTscan is
an excellent method for extracting bone. The contrast between bone and soft tissue is
excellent. In this case, with the CTscan, the fontanelles are identified as discontinuities
between the images of the temporal scales.
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