Qhov loj thiab tseem ceeb ntawm MRI & NMR yog hlau nplaum.Chav tsev uas txheeb xyuas qhov qib hlau nplaum no hu ua Tesla.Lwm chav ntsuas ntawm kev ntsuas siv rau cov hlau nplaum yog Gauss (1 Tesla = 10000 Gauss).Tam sim no, cov hlau nplaum siv rau kev sib nqus resonance imaging yog nyob rau hauv thaj tsam ntawm 0.5 Tesla rau 2.0 Tesla, uas yog, 5000 txog 20000 Gauss.