• Object ID: 00000018WIA30395970GYZ
  • Topic ID: id_40021539 Version: 1.2
  • Date: Mar 16, 2022 12:33:02 PM

Adjust the Signal/Noise

About this task

Use these steps to adjust the signal/noise range so that you can avoid signal artifacts. For example, if you have a large lipid peak, you can adjust the noise range so the lipid signal is not part of the noise, thus improving the SNR. The ratio of signal amplitude to noise - i.e., the amplitude of signal emitted by the patient’s protons, divided by the amount of patient noise and electronic noise inherent in any electronic instrument.

Step-by-step instructions

  1. From the spectroscopy Review Steps, click Spectroscopy.
    • Note: that Brain or Prostate precedes Spectroscopy, based on the selected data set.
  2. From the Spectroscopy screen, click Adv Settings tab.
  3. From the Figure 2, click Sig/Noise tab.
  4. Click and drag the Composite, Signal and Noise sliders.
    • Click and drag the Composite slider to change the range of values that are displayed in the composite metabolite map.
    • Click and drag the Signal and Noise (Deviation) sliders to set the range for what you consider to be the noise and the signal of a specific metabolite or sum of metabolites.
  5. Click Compute to recalculate all spectrum.

    Click Reset or Reset All to return to the original settings or factory settings. Click Save All to save changed selections as the new default values.