Research

QA Status

Daily fMRI QAFunctional Magnetic Resonance Imaging (fMRI) is a functional imaging sequence based on MRI principles used to detect brain activity. This sequence relies heavily on image quality and stability of the magnet's performance. To verify the stability of the signal produced during fMRI sequence, a detailed quality assurance (QA) test is done with the fMRI sequence performed with a phantom that mimics the human head in an RF head coil. The images obtained from this QA are sent for advanced image processing that generates various image quality measures (e.g. signal-to-noise ratio, percent fluctuation, ghosting levels). This data is monitored by an MR physicist who is responsible in setting up acceptable upper and lower threshold limits for each of these values collected over a specified time frame (i.e. 6 month or 1 year). The data obtained from the daily QA is plotted graphically with the threshold limits marked. The graphical representation of the data helps researchers determine the status of the magnet and its performance on a daily basis. This routine QA scan helps identify any performance or stability issues to the MR system early on and can help expedite services leading to better equipment and image quality stability over a time. Daily QA results and data over time are available here to assist with fMRI research efforts. Please contact us if you have any questions.