caa a22 4500 605492026 CHVBK 20210128100513.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00261-014-0181-2 doi (NATIONALLICENCE)springer-10.1007/s00261-014-0181-2 Zoomed echo-planar imaging using parallel transmission: impact on image quality of diffusion-weighted imaging of the prostate at 3T [Elektronische Daten] [Andrew Rosenkrantz, Hersh Chandarana, Josef Pfeuffer, Michael Triolo, Mohammed Shaikh, David Mossa, Christian Geppert] Purpose: To assess impact of two-channel parallel transmission (pTx) with focused excitation [zoomed echo-planar imaging (EPI)] on image quality of prostate diffusion-weighted imaging (DWI) at 3T. Methods: 27 male volunteers (27±8years) underwent 3T prostate MRI using 2-channel radiofrequency-transmit system and 18-channel torso receive coil. Scans included EPI-DWI sequence (b values 50, 500, 1000s/mm2) acquired both with standard sinc pulse and 2-channel pTX with focused excitation, each acquired at large-field-of-view (FOV) (20×20cm) and small-FOV (14×14cm). An abdominal radiologist scored b-1000 images and ADC maps for image quality measures. Sequences were compared using paired Wilcoxon tests. Results: pTx with focused excitation showed significant improvements compared with standard DWI on b-1000 images at large-FOV for the absence of wrap and overall image quality (p≤0.049); on b-1000 images at small-FOV for reduced distortion of prostate, absence of ghosting, absence of wrap, clarity of prostate capsule, clarity of peripheral/transition zone boundary, clarity of peri-urethral region, and overall image quality (p≤0.004); and on ADC maps at small-FOV for reduced distortion of prostate, sharpness of prostate, clarity of prostatic capsule, clarity of peri-urethral region, and overall image quality (p=0.002-0.036). When compared with standard large-FOV images, small-FOV images obtained using pTx with focused excitation showed no significant difference on the b-1000 images for any feature (p≥0.175), while showing significant improvements on the ADC maps in terms of reduced distortion, absence of ghosting, and absence of wrap (p=0.010-0.030). Conclusion: Zoomed DWI using 2-channel pTx reduced artifacts and improved image quality for 3T prostate DWI; benefit was most apparent for small-FOV images. Springer Science+Business Media New York, 2014 Prostate cancer nationallicence MRI nationallicence Diffusion-weighted imaging nationallicence 3T nationallicence Parallel transmission nationallicence Rosenkrantz Andrew Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut Chandarana Hersh Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut Pfeuffer Josef Siemens Healthcare, Allee am Röthelheimpark 2, 91052, Erlangen, Germany aut Triolo Michael Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut Shaikh Mohammed Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut Mossa David Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut Geppert Christian Siemens Medical Solutions MR R&D, 660 First Avenue, 10016, New York, NY, USA aut Abdominal Imaging Springer US; http://www.springer-ny.com 40/1(2015-01-01), 120-126 0942-8925 40:1<120 2015 40 261 https://doi.org/10.1007/s00261-014-0181-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00261-014-0181-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rosenkrantz Andrew Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut NATIONALLICENCE 700 1- Chandarana Hersh Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut NATIONALLICENCE 700 1- Pfeuffer Josef Siemens Healthcare, Allee am Röthelheimpark 2, 91052, Erlangen, Germany aut NATIONALLICENCE 700 1- Triolo Michael Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut NATIONALLICENCE 700 1- Shaikh Mohammed Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut NATIONALLICENCE 700 1- Mossa David Department of Radiology, NYU Langone Medical Center, 550 First Avenue, 10016, New York, NY, USA aut NATIONALLICENCE 700 1- Geppert Christian Siemens Medical Solutions MR R&D, 660 First Avenue, 10016, New York, NY, USA aut NATIONALLICENCE 773 0- Abdominal Imaging Springer US; http://www.springer-ny.com 40/1(2015-01-01), 120-126 0942-8925 40:1<120 2015 40 261