Computer, data mining, database of image, image processing, Medicine
Accelerating Parallel Image Reconstruction Using Random Projection Prologue Random projection has been used for data dimension reduction . The concept of random projection is related to compressed sensing , a topic that has attracted many attentions recently. By...
Computer, data mining, database of image, image processing, Medicine
Compressed Sensing MRI Parallel imaging has led to revolutionary progress in the field of rapid MRI in the past two decades. However, as discussed in the previous section, the maximum acceleration that can be achieved in parallel imaging is limited by the number and...
Computer, data mining, database of image, image processing, Medicine
The Need for Speed in MRI MR imaging speed is of critical importance in many clinical applications. However, the imaging speed with which gradient-encoded MR images can be acquired is fundamentally limited by the sequential nature of gradient-based MR acquisitions, in...
Computer, data mining, database of image, image processing, Medicine
MR Image Reconstruction As shown in Eq. (2.11), MR signal from a two-dimensional plane is a spatial integration of the spin density against the sinusoidal spatial modulation generated by encoding gradients. In other words, the MR signal comprises projections of the...
Computer, data mining, database of image, Medicine
Spatial Encoding and k-Space Formalism Following slice selection, the in-plane spatial information now can be further encoded with two additional gradients, known as frequency-encoding and phase-encoding gradients. In 2D imaging, the received MRI signal can be...
Computer, data mining, database of image, image processing, Medicine
MRI Signal NMR Phenomenon The physical phenomenon behind MRI is nuclear magnetic resonance (NMR), which was first discovered in the 1940s. An atomic nucleus with an odd number of protons possesses an angular momentum J called spin, which generates a tiny magnetic...
Computer, data mining, database of image, image processing, Medicine
Magnetic Resonance Imaging Magnetic Resonance Imaging (MRI) is a non-invasive and powerful imaging modality, with a broad range of applications in both clinical diagnosis and basic scientific research. Comparing to other medical imaging modalities, MRI does not use...
