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In practice, k-space often refers to the temporary image space, usually a matrix, in which data from digitized MR signals are stored during data acquisition. When k-space is full (at the end of the scan) the data are mathematically processed to produce a final image. Thus k-space holds raw data before reconstruction.
Since the data at the center of k-space represent lower spatial frequencies than the data at the edges of k-space, the T E value for the center of k-space determines the image's T 2 contrast. The importance of the center of k-space in determining image contrast can be exploited in more advanced imaging techniques. One such technique is spiral ...
Investigation of more advanced strategies for recovering data in this k-space region is also a topic of ongoing research. [16] Thresholded k-space division [12] [17] only requires a single angle acquisition, and benefits from the ease of implementation as well as the fast calculation speed. However, streaking artifacts are frequently present in ...
Other k-space sampling trajectories. Efficient k-space sampling also decreases data collection time. Rectilinear scanning has become the standard k-space sampling method for MRI. [14] However, the process takes a relatively long time as it samples the entire k-space equally.
Magnetic Resonance Fingerprinting (MRF) unlike MRI, dynamically varies acquisition parameters throughout the process. Unlike traditional methods that repetitively use the same parameters until full k-space data are acquired, MRF's flexible approach involves adjusting radiofrequency excitation angle (FA), phase, repetition time, and k-space ...
Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to generate pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to form images of the organs in the body.
Echo-planar imaging is an MRI technique that reduces the time of data acquisition to reduce capture of patient movement. An image in the EPI can be captured in between 20-100 milliseconds. Multiple lines of data are created by transmitting RF pulse sequences with a gradient difference of 90° and 180°.
Momentum space, or wavevector space, the vector space of possible values of momentum for a particle; k-space (magnetic resonance imaging) Another name for a compactly generated space in topology; K-space (functional analysis) is an F-space such that every twisted sum by the real line splits; K-Space (band), a British-Siberian music ensemble