Comparison of Coregistration Accuracy of Pelvic Structures Between Sequential and Simultaneous Imaging During Hybrid PET/MRI in Patients with Bladder Cancer

Clinical Nuclear Medicine
Andrew B RosenkrantzKent P Friedman

Abstract

The aim of this study was to compare coregistration of the bladder wall, bladder masses, and pelvic lymph nodes between sequential and simultaneous PET and MRI acquisitions obtained during hybrid (18)F-FDG PET/MRI performed using a diuresis protocol in bladder cancer patients. Six bladder cancer patients underwent (18)F-FDG hybrid PET/MRI, including IV Lasix administration and oral hydration, before imaging to achieve bladder clearance. Axial T2-weighted imaging (T2WI) was obtained approximately 40 minutes before PET ("sequential") and concurrently with PET ("simultaneous"). Three-dimensional spatial coordinates of the bladder wall, bladder masses, and pelvic lymph nodes were recorded for PET and T2WI. Distances between these locations on PET and T2WI sequences were computed and used to compare in-plane (x-y plane) and through-plane (z-axis) misregistration relative to PET between T2WI acquisitions. The bladder increased in volume between T2WI acquisitions (sequential, 176 [139] mL; simultaneous, 255 [146] mL). Four patients exhibited a bladder mass, all with increased activity (SUV, 9.5-38.4). Seven pelvic lymph nodes in 4 patients showed increased activity (SUV, 2.2-9.9). The bladder wall exhibited substantially less misregis...Continue Reading

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Citations

Jan 29, 2016·Gastroenterology Research and Practice·Matthew P MoyMichael S Gee
Oct 23, 2015·AJR. American Journal of Roentgenology·Andrew B RosenkrantzRajan Jain
Aug 26, 2015·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·R A TownerR E Hurst
May 26, 2016·Japanese Journal of Radiology·Kazuhiro KitajimaHossein Jadvar
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Jul 19, 2017·Current Urology Reports·Abhishek SrivastavaKara L Watts
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Mar 3, 2017·Nuclear Medicine and Molecular Imaging·Hyun Woo KwonGi Jeong Cheon
Nov 21, 2018·Clinical and Translational Imaging : Reviews in Nuclear Medicine and Molecular Imaging·Ebru SalmanogluMathew L Thakur
Aug 14, 2021·The British Journal of Radiology·Lisa A MinDoenja M J Lambregts

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