Turboprop IDEAL: A motion-resistant fat-water separation technique

Donglai Huo, Zhiqiang Li, Eric Aboussouan, John P. Karis, James G. Pipe

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Suppression of the fat signal in MRI is very important for many clinical applications. Multi-point water-fat separation methods, such as IDEAL (Iterative Decomposition of water and fat with Echo Asymmetry and Least-squares estimation), can robustly separate water and fat signal, but inevitably increase scan time, making separated images more easily affected by patient motions. PROPELLER (Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction) and Turboprop techniques offer an effective approach to correct for motion artifacts. By combining these techniques together, we demonstrate that the new TP-IDEAL method can provide reliable water-fat separation with robust motion correction. The Turboprop sequence was modified to acquire source images, and motion correction algorithms were adjusted to assure the registration between different echo images. Theoretical calculations were performed to predict the optimal shift and spacing of the gradient echoes. Phantom images were acquired, and results were compared with regular FSE-IDEAL. Both T1- and T2-weighted images of the human brain were used to demonstrate the effectiveness of motion correction. TP-IDEAL images were also acquired for pelvis, knee, and foot, showing great potential of this technique for general clinical applications.

Original languageEnglish (US)
Pages (from-to)188-195
Number of pages8
JournalMagnetic Resonance in Medicine
Issue number1
StatePublished - Jan 2009


  • Fat suppression
  • Turboporp

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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