Gamma Girl Posted December 4, 2016 Share Posted December 4, 2016 Why does a sample in an NMR spectrometer spin, but in an MRI, the magnet spins? Link to comment Share on other sites More sharing options...
John Cuthber Posted December 4, 2016 Share Posted December 4, 2016 Do you know why they spin in ether case? 1 Link to comment Share on other sites More sharing options...
Gamma Girl Posted December 4, 2016 Author Share Posted December 4, 2016 The different spin states creates different energy differences for NMR due to different frequencies. Link to comment Share on other sites More sharing options...
studiot Posted December 4, 2016 Share Posted December 4, 2016 What is 'the sample' in each case? What does each technique measure? Link to comment Share on other sites More sharing options...
Gamma Girl Posted December 4, 2016 Author Share Posted December 4, 2016 The sample is a molecule. MRI deals with magnets like in CAT scans. Link to comment Share on other sites More sharing options...
studiot Posted December 4, 2016 Share Posted December 4, 2016 in CAT scans. Isn't that the answer you require, or do hospital patients spin where you come from? Link to comment Share on other sites More sharing options...
Gamma Girl Posted December 4, 2016 Author Share Posted December 4, 2016 No Elaborate, please. Actually, I understand now. Thank-you again. Link to comment Share on other sites More sharing options...
BenSCBSc Posted February 13, 2017 Share Posted February 13, 2017 Hi, I am actually running measurements at the moment using 400 MHz 1H NMR spectroscopy. The purpose of spinning the sample is to average the effect of inhomogeneities (unevenness, deviation from a uniform field) in the main magnetic field. Link to comment Share on other sites More sharing options...
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