Three-dimensional MR Cholangiopancreatography in a Breath Hold with Sparsity-based Reconstruction of Highly Undersampled Data

摘要: Purpose To develop a three-dimensional breath-hold (BH) magnetic resonance (MR) cholangiopancreatographic protocol with sampling perfection application-optimized contrast using different flip-angle evolutions (SPACE) acquisition and sparsity-based iterative reconstruction (SPARSE) of prospectively sampled 5% k-space data to compare the results conventional respiratory-triggered (RT) acquisition. Materials Methods This HIPAA-compliant prospective study was institutional review board approved. Twenty-nine patients underwent RT SPACE BH-accelerated at 3 T. Spatial resolution other parameters were matched when possible. BH images reconstructed by enforcing joint multicoil sparsity in wavelet domain (SPARSE-SPACE). Two board-certified radiologists independently evaluated SPARSE-SPACE for image quality pancreatic duct common bile five-point scale. The Wilcoxon signed-rank test used images. Results Acquisition time 20 seconds, which significantly (P .05). For reader 1, distal scores higher = .036). More had acceptable or better overall (scores ≥ 3) than acquisition, respectively, proximal (23 29 [79%] vs 22 [76%]), middle (22 [76%] 18 [62%]), (20 [69%] 13 [45%]) (25 28 [89%] [79%]) 24 [86%]) duct. Conclusion showed similar superior compared that despite 17-fold shorter time. (©) RSNA, 2016.