MR signal and contrast calculator (SE) The MR signal and contrast calculator 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 contrast calculator … More MR signal and contrast calculators
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
First choose tissue T1 and T2 values. Then select your scanning TR and TE (for spin echo) The graph shows the signal intensity (max = 1) for both tissues, the contrast and the relative contrast to noise ratio (CNR). The calculator currently works on computers and Android devices only.
Use the SNR and resolution calculator to investigate the effect of various parameter changes in MRI. The calculator reports the relative (to default parameters) SNR, pixel size and scan time. Note: this works best on a computer and does not work yet on IOS devices. It will work on Android devices. Explanation of the … More SNR and resolution calculator
The SAR and B1+rms calculator has been updated to version 2.2. This uses a more realistic model (assumes the body within the RF coil is a uniform cylinder, rather than a sphere). It also calculates the average (whole body) SAR whereas before it calculated the peak SAR- so it doesn’t so easily jump out of the Normal … More SAR and B1+rms calculator update