Noise power spectrum in PROPELLER MR imaging

Yuki Ichinoseki, Tatsuo Nagasaka, Kota Miyamoto, Hajime Tamura, Issei Mori, Yoshio Machida

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The noise power spectrum (NPS), an index for noise evaluation, represents the frequency characteristics of image noise. We measured the NPS in PROPELLER (Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction) magnetic resonance (MR) imaging, a nonuniform data sampling technique, as an initial study for practical MR image evaluation using the NPS. The 2-dimensional (2D) NPS reflected the k-space sampling density and showed agreement with the shape of the k-space trajectory as expected theoretically. Additionally, the 2D NPS allowed visualization of a part of the image reconstruction process, such as filtering and motion correction.

Original languageEnglish
Pages (from-to)235-242
Number of pages8
JournalMagnetic Resonance in Medical Sciences
Issue number3
Publication statusPublished - 2015 Aug 11


  • Image quality
  • MRI
  • Noise power spectrum

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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