MTF_1: Transverse plane over lumbar vertebrae demonstrating the acoustic shadow formed by the spinous process and laminae
MTF_2: Sagittal orientation demonstrating the outline of the lumbar facets, very high contrast setting used, good outline of bony structures
MTF_3: Sagittal orientation of lumbar facets, moderate contrast image showing striations of superficial lumbar musculature
MTF_3b: Previous image with multifidus labeled
MTF_4: Lean patient but difficult to visualize due to hyperechoic tissues, note reflection from edge of bone, increased depth to 9cm.
MTF_5: Patient with moderate adipose but very fit, note muscle striations and bone reflection, depth 11cm
