Download e-book for kindle: 7.0 Tesla MRI Brain Atlas by

ISBN-10: 1607611538

ISBN-13: 9781607611530

The pictures during this atlas, taken at 7.0 Tesla, are of a reside topic with correlating cryomacrotome pictures. They display info of the most stem and midbrain constructions as soon as idea most unlikely to imagine in vivo. every one photo is annotated and unique.

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Extra info for 7.0 Tesla MRI Brain Atlas

Example text

The frequency content being eliminated is hopefully much more associated with noise than with imaged features of interest. In Fig. 2 the reduction in high frequency content by the display software somewhat optimally softens the edges of the discrete data value pixels being presented. Filtered backprojection A method of reconstruction that sums individual contributions to a pixel (voxel) value from detected counts of all lines of response passing through this pixel (voxel). It is an alternative approach to iterative reconstruction.

Gray scale The assignment of quantitative image brightness levels to numerical values being represented in a pixel (voxel), ranging from white (corresponding to one extreme value) to black (corresponding to the other extreme). A typical gray scale might contain 256 shades of gray. Each of these shades corresponds to a chosen band of values in their progressive sequence encompassing the dynamic range. See also color scale and lookup table. 0 5 10 Fig. 1 A simple gray scale in which black and 10 lighter shades are used to represent the values 0 through 10 Example: Fig.

It is referred to as a Fourier transform of the original sequence of values. Fourier analysis is a convenient tool for use in reconstruction calculations where spatial data from an image is transformed. It is found convenient to perform numerical operations on the transformed data rather than the original spatial data. A row of pixel values, Q1, Q2, Q3, … Qn, at n xi locations is represented by A1cos(2p fxi − q1) + A2cos(4p fxi − q2) + A3cos(6p fxi − q3) …, etc. Here, the Aj and qj are the amplitudes and phases of the components with frequencies f, 2f, 3f, …, etc.

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7.0 Tesla MRI Brain Atlas


by James
4.0

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