Magnetic resonance cholangiopancreatography with compressed sensing at 1.5 T: clinical application for the evaluation of
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Magnetic resonance cholangiopancreatography with compressed sensing at 1.5 T: clinical application for the evaluation of branch duct IPMN of the pancreas Benjamin Henninger 1 Christian Kremser 1
&
Michael Steurer 1 & Michaela Plaikner 1 & Elisabeth Weiland 2 & Werner Jaschke 1 &
Received: 31 March 2020 / Revised: 23 April 2020 / Accepted: 29 May 2020 # The Author(s) 2020
Abstract Objectives To evaluate magnetic resonance cholangiopancreatography (MRCP) with compressed sensing (CS) for the assessment of branch duct intraductal papillary mucinous neoplasm (BD-IPMN) of the pancreas. For this purpose, conventional navigator-triggered (NT) sampling perfection with application-optimized contrast using different flip angle evolutions (SPACE) MRCP was compared with various CS-SPACE-MRCP sequences in a clinical setting. Methods A total of 41 patients (14 male, 27 female, mean age 68 years) underwent 1.5-T MRCP for the evaluation of BD-IPMN. The MRCP protocol consisted of the following sequences: conventional NT-SPACE-MRCP, CS-SPACE-MRCP with long (BHL, 17 s) and short single breath-hold (BHS, 8 s), and NT-CS-SPACE-MRCP. Two board-certified radiologists evaluated image quality, duct sharpness, duct visualization, lesion conspicuity, confidence, and communication with the main pancreatic duct in consensus using a 5-point scale (1–5), with higher scores indicating better quality/delineation/confidence. Maximum intensity projection reconstructions and originally acquired data were used for evaluation. Wilcoxon signed-rank test was used to compare the intra-individual difference between sequences. Results BHS-CS-SPACE-MRCP had the highest scores for image quality (3.85 ± 0.79), duct sharpness (3.81 ± 1.05), and duct visualization (3.81 ± 1.01). There was a significant difference compared with NT-CS-SPACE-MRCP (p < 0.05) but no significant difference to the standard NT-SPACE-MRCP (p > 0.05). Concerning diagnostic quality, BHS-CS-SPACE-MRCP had the highest scores in lesion conspicuity (3.95 ± 0.92), confidence (4.12 ± 1.08), and communication (3.8 ± 1.06), significantly higher compared with NT-SPACE-MRCP, BHL-SPACE-MRCP, and NT-CS-SPACE-MRCP (p = 18 years, (3) no history of pancreatic surgery, (4) acquisition of our whole MRCP protocol as mentioned below, (5) suspicion of branch duct IPMN (BD-IPMN) in our current MRI report (positive communication of the cystic lesion with the main pancreatic duct in at least one sequence, no previous MRI available) or in other imaging procedures (e.g., computed tomography (CT), endoscopic ultrasound (EUS), or previous MRI), i.e., positive communication of the cystic lesion with the main pancreatic duct, mentioned in the report (see Fig. 1). After searching our internal database, we retrospectively included 41 patients (27 female; 14 male; median age, 69 years; range, 46–89 years) between March 2018 and December 2018. Thereby, 18/41 were referred with suspicion and 23/41 for follow-up of BD-IPMN (=patients with previous MRI).
MR imaging All studies were performed on a 1.5-T
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