Zoomed echo-planar imaging using parallel transmission: impact on image quality of diffusion-weighted imaging of the prostate at 3T

Abstract

Zoomed DWI using 2-channel pTx reduced artifacts and improved image quality for 3T prostate DWI; benefit was most apparent for small-FOV images.

Prostate diffusion imaging with distortion correction

“…Although diffusion imaging in the prostate is becoming the standard of care in prostate MRI protocols, distortion correction has not yet been widely implemented for prostate diffusion imaging. Other distortion minimizing techniques are being evaluated in the prostate but focus on minimizing the distortion rather than correcting for distortion due to B) inhomogeneity [29, 30]. …”

Feasibility of accelerated simultaneous multislice diffusion‐weighted MRI of the prostate

“…At the same time, spatial resolution is limited, with the potential risk of missing subtle findings . To overcome this problem, inner volume imaging approaches and parallel imaging techniques have been integrated to reduce artifacts by shortening echo spacing and reducing the field of view in the phase‐encoding direction . To increase acquisition speed of DWI, simultaneous multislice (SMS) excitation techniques have been introduced recently.…”

Feasibility and evaluation of dual-source transmit 3D imaging of the orbits: Comparison to high-resolution conventional MRI at 3T

“…Other groups reported advantages in liver imaging [11] and breast imaging [22]. Dual-source transmission DWI imaging provides benefits in the assessment of phantom experiments [15], the liver [10,11], the pancreas [14,15,23] the spinal cord [12], the prostate [9,24], and head and neck imaging [25]. All these studies report benefits of dual-source transmission in image acquisition of a small region within the body.…”

“…In theory, this approach enables local B1-shimming with more homogenous excitation of the volume of interest, improvement of spatial resolution, and reduction of scan time without foldover artifacts. The pTX technology has recently been reported to increase image quality using the so-called "inner volume imaging" approach [8] in the assessment of several regions, amongst others of the prostate [9], liver imaging [10,11], spine [12,13], and pancreas [14,15]. To our best knowledge, there are no reports of orbital MR imaging using this technique in literature.…”