Parallel and sparse MR imaging: methods and instruments—Part 2

Just as array transducers and advanced signal processing have significantly improved ultrasound imaging, parallel imaging with transmit/receive array and sparse imaging techniques have revolutionized MRI. The high-speed MRI and high-field MRI enabled by these new developments are truly exciting, and are viewed as key to advancing MRI from anatomical imaging to functional, dynamic, and molecular imaging. MRI is a premier noninvasive imaging modality. However, it is still a relatively slow modality when compared to ultrasound, X-ray computer tomography (CT), and optical imaging; and is less sensitive than positron emission tomography (PET) in the realm of molecular imaging. High fields and ultra-high field MRI, by offering increased signal strength, speed, and novel contrast, offer an opportunity to significantly reduce such gaps. As high-field MRI and high-speed MRI are being proven to be critical for more and more applications, engineering and clinical innovations and developments will continue to emerge.