PET Positron emission tomography a form of computerized scanning that uses rays given off by substances put into the body to identify very busy or metabolically active cells and tissues.General characteristics see also TableSo the mamsa or muscle dhatu is accompanied by mamsavaha srotas carrying muscle nutrients and waste while the majja or bone marrow dhatu corresponds with the majjavaha srotas supplying the bone marrow nutrientsplus in this case the nutrients for the nerves and nervous tissues including the brain. <a href=http://fast-isotretinoin.com/#urrbcyr>Accutane</a> and Hartline H.Switching to Xrays and better scanners greatly reduced the time it took to produce a scan.