Qualitative and Quantitative Comparison of Respiratory Triggered Reduced Field-of-View (FOV) Versus Full FOV Diffusion Weighted Imaging (DWI) in Pancreatic Pathologies

Felix N. Harder, Omar Kamal, Georgios A. Kaissis, Irina Heid, Fabian K. Lohöfer, Sean McTavish, Anh T. Van, Christoph Katemann, Johannes M. Peeters, Dimitrios C. Karampinos, Marcus R. Makowski, Rickmer F. Braren

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Rationale and Objectives: To investigate the effects of a reduced field-of-view (rFOV) acquisition in diffusion-weighted magnetic resonance imaging of the pancreas. Materials and Methods: We enrolled 153 patients who underwent routine clinical MRI work-up including respiratory-triggered diffusion-weighted single-shot echo-planar imaging (DWI) with full field-of-view (fFOV, 3 × 3 × 4 mm3 voxel size) and reduced field-of-view (rFOV, 2.5 × 2.5 × 3 mm3 voxel size) for suspected pancreatic pathology. Two experienced radiologists were asked to subjectively rate (Likert Scale 1–4) image quality (overall image quality, lesion conspicuity, anatomical detail, artifacts). In addition, quantitative image parameters were assessed (apparent diffusion coefficient, apparent signal to noise ratio, apparent contrast to noise ratio [CNR]). Results: All subjective metrics of image quality were rated in favor of rFOV DWI images compared to fFOV DWI images with substantial-to-high inter-rater reliability. Calculated ADC values of normal pancreas, pancreatic pathologies and reference tissues revealed no differences between both sequences. Whereas the apparent signal to noise ratio was higher in fFOV images, apparent CNR was higher in rFOV images. Conclusion: rFOV DWI provides higher image quality and apparent CNR values, favorable in the analysis of pancreatic pathologies.

Original languageEnglish
Pages (from-to)S234-S243
JournalAcademic Radiology
Volume28
DOIs
StatePublished - Nov 2021

Keywords

  • Diffusion weighted imaging
  • Magnetic resonance imaging
  • Pancreas
  • Reduced field-of-view

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