Gradient echo (GE, GRE, FLASH, SPGR, T1-FFE, FE) is one of the hardest elements of MRI to understand. Image signal and contrast in spoiled gradient echo depends upon three user-selected parameters: Flip angle <90º TR – repetition time, typically > 10 ms TE – echo time, typically > 2 ms Signal and contrast also depend … More Gradient echo signal and contrast
First choose tissue T1 and T2 values. Then select your scanning TR, TE and flip angle. You can also set a field inhomogeneity factor. The calculator uses an estimated value of T2* based upon this and the tissue T2. The graph shows the signal intensity (max = 1) for both tissues, the contrast and the … More Gradient echo signal and contrast calculator
Engineering and Physical Sciences in Medicine, Adelaide, 28 October 2018 I was delighted to convene this pre- conference workshop at the Royal Adelaide Hospital on behalf of the Australasian College of Physical Scientists and Engineers in Medicine. A full capacity audience heard presentations from leading local MR professionals- all with the focus of encouraging collaboration … More MR Physics Workshop
A controversy currently rages in the USA regarding radiation safety for low doses of ionising radiation. In a review of how science is used for regulatory purposes by the Environmental Protection Agency, a Senate committee has been hearing evidence from an hormesis (‘low doses of poison are good for you’) enthusiast, Edward Calabrese. I heard … More Is a little radiation good for you?
This 7 hour course builds upon the Siemens Essential MR Safety Courses and includes the latest updates, exercises and workshops on B1+rms, pacemaker function and scanning, MR safety policy writing, suite layout for safety plus a review of the Essential MR Safety material. The course is designed for delegates who have previously attended Essential MR Safety … More Essential MR Safety: Next Steps