Diffusion Tensor Imaging: Introduction and Atlas by Dr. Bram Stieltjes, Prof. Dr. Romuald M. Brunner, Dr. Klaus

By Dr. Bram Stieltjes, Prof. Dr. Romuald M. Brunner, Dr. Klaus H. Fritzsche, Dr. Frederik B. Laun (auth.)

Diffusion Tensor Imaging (DTI) is a version of diffusion-weighed imaging. relatively within the neurosciences, this system has received super momentum long ago decade, either from a technical perspective in addition to in its functions. DTI is especially utilized in neurological analysis and psychiatric and neurologic study, e.g. so as to find mind tumors and depict their invasivity.

DTI bargains a different in-vivo perception into the three-d constitution of the human relevant fearful procedure. whereas effortless interpretation and review is frequently hampered by way of the complexity of either the procedure and neuroanatomy, this atlas is helping you know each of the real buildings speedily and unambiguously.

In the creation, this atlas offers a concise define of the evolution of diffusion imaging and describes its power purposes. within the middle a part of the atlas, the neuroanatomically very important buildings are essentially categorized either on DTI-derived colour maps and standard MRI. complicated fiber structure is illustrated schematically and defined concisely in textboxes without delay at the correct web page. within the ultimate a part of the atlas, an easy, step by step process for the third-dimensional reconstruction of the main favourite fiber buildings is given, and capability pitfalls are indicated.

The atlas goals at neuroscientists, neuroanatomists, neurologists, psychiatrists, medical psychologists, physicists, and laptop scientists. For complicated clients, the atlas could function a reference paintings, whereas scholars and scientists are completely brought into DTI.

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Fig. 25) are not simultaneous in all brain regions, for example, white matter RA values increase first in the occipital lobe, but occur rapidly during the first year of life. Normative Brain Development The timeline of brain maturation was illustrated by Giedd et al. as shown in . Fig. 24. The central nervous system begins to develop in the human fetus 2–3 weeks after conception through the folding and fusion of the ectoderm to create the neural tube [19]. The rate of synaptogenesis peaks after the 34th week of gestation (40,000 new synapses per second and continue into adulthood; [48][95]).

Why is the CSA reconstruction advantageous? There are several reasons. One disadvantage of the original QBI technique is that it is intrinsically not normalized. This problem is usually tackled by some kind of artificial normalization, for instance, to minimal and maximal ODF values. For example, the ODFs depicted in . Fig. 17 are not the ODFs that emerged from the reconstruction. These raw ODFs are much more spherical and were min–max normalized during post-processing. A further HARDI technique is spherical deconvolution [137] [138].

Magn Reson Med 34: 586–595 Does MD, Parsons EC, Gore JC (2003) Oscillating gradient measurements of water diffusion in normal and globally ischemic rat brain. Magn Reson Med 49: 206–215 Doran M, Hajnal JV, Van Bruggen N et al. (1990) Normal and abnormal white matter tracts shown by MR imaging using directional diffusion weighted sequences. J Comput Assist Tomogr 14: 865–873 Einstein A (1905) Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen.

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