ENCODING AND IMAGE FORMATION

the z gradient alters the ______ axis of magnet
the y gradient alters ______ axis of magnet
the x gradient alters ______ axis of magnet
- z = longitudinal
- y = vertical
- x = horizontal
what is the point of all three gradients and the bore of the magnet

isocentre
the isocenter is of what value

same value is b0 external field strength aka tesla strength
what is slice selection

locating a slice within the scan plane selected
what is frequency encoding

spatially locating a signal along the long axis of the anatomy
what is phase encoding

locating signal along the short axis of the antomy
z gradient ______ slices
x gradient _______ slices
y gradient _______ slices
- z axial slices
- x = sagittal slices
- y = coronal slices
what is k space

when data is collected the information is stored as data points in the array processor of the computer
what are the two longitudinal and transverse axis of k space
- longitudinal is =phase axis
- transverse = frequency axis
what is the unit for k space

radians per cm
the lines in the top half of k space are ______
the bottoms are ___
- positive
- negative
what is NEX

number of excitaitons or number of signal averages that each line is filled with data

Author

MriSensei

338426

Card Set

ENCODING AND IMAGE FORMATION

Description

MRI

Updated

2018-02-26T20:07:05Z

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