Function BIRN Stability Phantom QA Procedures

Filed under: Tools

Status: Archived

THESE ARE THE ORIGINAL VERSIONS OF THE TOOLS. For the most updated versions, please see the BXE/XCEDE QA tools available here.

The Quality Assurance scans are performed on a routine basis. They are used to verify and measure the scanner stability during a typical fMRI scanning sequence. The scans are performed on a 17cm spherical phantom filled with an agar gel. The scans consist of 200 separate image volumes captured over roughly a 10 minute interval. Post acquisition analyses consist of mean and standard deviation measurements, drift and percent fluctuation in signal, signal-to-noise (SNR), and signal-to-fluctuation-noise (SFNR) ratios calculated over all volumes.

Figure: Images of QA agar gel phantom time series maps. (A) mean, (B) standard deviation, (C) noise average, (D) SFNR.

Figure: Images of QA agar gel phantom time series maps. (A) mean, (B) standard deviation, (C) noise average, (D) SFNR.

Figure: Results from the QA analysis

Figure: Results from the QA analysis

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BIRN is supported by NIH grants 1U24-RR025736, U24-RR021992, U24-RR021760 and by the Collaborative Tools Support Network Award 1U24-RR026057-01.