Development of a rotation phantom for phase contrast MRI sequence validation and quality control

Alireza Vali*, Sebastian Schmitter, Liliana Ma, Sebastian Flassbeck, Simon Schmidt, Michael Markl, Susanne Schnell

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Purpose: To develop a reliable, consistent, and reproducible reference phantom for error quantification of phase-contrast MRI so it can be used for validation and quality control. Methods: An air-driven rotation phantom consisting of a steadily rotating cylinder surrounded by a static ring both filled with agarose gel was developed. Rotational speed was measured and controlled in real time using an optical counter and a closed-loop controller. Consistency of the phantom was assessed by recording variations in rotational speed. The phantom was imaged with 2D phase-contrast MRI, and the velocity at each point was compared with analytically predicted velocity. Additionally, to examine reproducibility, the phantom was run with the same rotational speed on 2 different days and imaged using the same phase-contrast MRI protocol. Results: The rotation phantom provided consistent rotational speed with 2 revolutions per minute SD from the set value for 20 min. Comparison between predicted and measured velocities demonstrated excellent agreement (intraclass correlation coefficient of 0.99). The RMS error in velocity components were less than 1% of maximum value. The scan–rescan experiment showed that the phantom can reproduce the same velocity distributions (intraclass correlation coefficient of 0.99) using the same rotational speed and MRI settings. Conclusion: The developed rotation phantom provided well-defined and reproducible linear velocity distributions, which can be used for systematic and quantitative error analysis of phase-contrast MRI for a range of known velocities.

Original languageEnglish (US)
Pages (from-to)3333-3341
Number of pages9
JournalMagnetic resonance in medicine
Volume84
Issue number6
DOIs
StatePublished - Dec 1 2020

Keywords

  • in vitro
  • phase-contrast (PC) MRI
  • quality control
  • rotation phantom
  • validation

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Fingerprint

Dive into the research topics of 'Development of a rotation phantom for phase contrast MRI sequence validation and quality control'. Together they form a unique fingerprint.

Cite this