With the help of newly arrived pressure MRI injector in the department of Radiodiagnosis.We have performed MR perfusion study in a lady with a heterogenous large lesion in the corpus callosum with heterogenous enhacement.But on perfusion the values were low suggesting low grade lesion.we gave the first differential of demyelinating lesion. And the patient then turned out to be positive for Neuromyelitis optica.With the injector we will be doing brain perfusion in tumour and stroke imaging. Now we can also do dynamic and multiphase studies of liver ,prostate and breast.