magnetic resonance imaging of lumbar spine: mass of mid L4 vertebra with hypointense signal intensity (S/I) ratio
magnetic resonance imaging of lumbar spine: mass of mid l4 vertebra with hypointense signal intensity (s/i) ratio
spine magnetic resonance imaging lumbar osseous mass SI ratio hypointense L4 mid
spine magnetic resonance imaging lumbar osseous mass si ratio hypointense l4 mid