magnetic resonance imaging of lumbar spine: mass of medial aspect of L4 vertebra with hypointense T1 signal
magnetic resonance imaging of lumbar spine: mass of medial aspect of l4 vertebra with hypointense t1 signal
L-spine MRI T1-weighted osseous mass hypointense signal L4 medial
l-spine mri t1-weighted osseous mass hypointense signal l4 medial