A fascinating ebook/website has been compiled by Graeme Bydder and Martyn Paley outlining the history of the development of MR imaging and spectroscopy in the UK. There are personal accounts from some of the pioneers including the late Ian Young and Bill Edelstein and many others. There are also obituaries for international researchers including Nobel … More History of MR in the UK
Listed below are some international and national (esp. UK and Australasia) MR safety standards and professional guidance documents. Reproduced from Essentials of MRI Safety. They are listed alphabetically. ACR Guidance Document on MR Safe Practices: 2013, American College of Radiology Expert panel on MR Safety Kanal et al. Magn. Reson. Imag. 37:501-530. Link: https://www.acr.org/Clinical-Resources/Radiology-Safety/MR-Safety Status: US-based … More MRI Safety Standards and Guidance
MR signal and contrast calculator (SE) The MR signal and contrast calculator or app lets you choose two tissue T1 and T2 whilst manipulating the scanner parameters: TR and TE to show the signal, contrast and relative contrast to noise ratio (CNR). Use the calculator to explore the weightings below. MR gradient echo signal and … More MR signal and contrast calculators
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: For any given tissue T1 and scanner TR there is a flip angle, the Ernst angle, that gives the maximum signal for that tissue. … 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 relative contrast … More Gradient echo signal and contrast calculator