caa a22 4500 605492506 CHVBK 20210128100515.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00261-014-0331-6 doi (NATIONALLICENCE)springer-10.1007/s00261-014-0331-6 Optimal section thickness for detection of polyps at MR: resolution phantom study [Elektronische Daten] [Courtney Moreno, Pardeep Mittal, Nicholas Henson, Deborah Baumgarten, Lauren Alexander, Timothy Hanes, William Small, Hiroumi Kitajima, Jian Kang, John Votaw, John Oshinski, W. Dixon] Purpose: To determine (1) the sensitivity for detection of small polyps with varying MR slice thicknesses using a resolution phantom; (2) reader confidence in polyp detection; and (3) image acquisition time. Methods: A resolution phantom was created using a 3D printer. Polyp morphologies were sessile (height=diameter), flat (height=1/2 diameter of the base), and pedunculated (stalk length=polyp diameter). Polyp diameters were 5, 7, 10, and 12mm. Images were acquired with section thicknesses of 5, 3, and 1mm. Images were independently reviewed by 4 board-certified radiologists who were blinded to phantom design and sequences parameters. Readers recorded maximal polyp diameter and confidence level that a polyp was present on a 1-100 point scale. Image acquisition time was also recorded. Results: All polyps were detected by all 4 readers in the 5-mm-section thickness series. All polyps were detected by 3 readers in the 3- and 1-mm-section thickness series. The fourth reader identified 11/12 polyps in the 3- and 1-mm-section thickness series. Confidence levels were not statistically significantly different for the different section thicknesses (p=0.28). Increasing the section thickness from 1 to 5mm decreased image acquisition time from 3 min 54s to 41s. Conclusions: Five-millimeter-section thickness was adequate for identification of 5-12mm polyps regardless of shape. Pending further reduction in acquisition time, this prototype sequence holds promise for segmental imaging of the colon with MR colonography. Springer Science+Business Media New York, 2014 Magnetic resonance imaging nationallicence Magnetic resonance colonography nationallicence Colorectal cancer nationallicence Colonic polyps nationallicence Moreno Courtney Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Mittal Pardeep Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Henson Nicholas Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Baumgarten Deborah Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Alexander Lauren Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Hanes Timothy Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Small William Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Kitajima Hiroumi Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Kang Jian Department of Biostatistics and Bioinformatics, Department of Radiology & Imaging Sciences, Emory University School of Medicine, Atlanta, GA, USA aut Votaw John Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Oshinski John Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Dixon W. Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut Abdominal Imaging Springer US; http://www.springer-ny.com 40/6(2015-08-01), 1451-1456 0942-8925 40:6<1451 2015 40 261 https://doi.org/10.1007/s00261-014-0331-6 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/s00261-014-0331-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moreno Courtney Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Mittal Pardeep Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Henson Nicholas Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Baumgarten Deborah Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Alexander Lauren Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Hanes Timothy Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Small William Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Kitajima Hiroumi Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Kang Jian Department of Biostatistics and Bioinformatics, Department of Radiology & Imaging Sciences, Emory University School of Medicine, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Votaw John Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Oshinski John Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Dixon W. Department of Radiology & Imaging Sciences, Emory University School of Medicine, 1364 Clifton Road, NE, 30322, Atlanta, GA, USA aut NATIONALLICENCE 773 0- Abdominal Imaging Springer US; http://www.springer-ny.com 40/6(2015-08-01), 1451-1456 0942-8925 40:6<1451 2015 40 261