Look at other limb for "normal" anatomy
Have patient range limb and view in real time
Know your limitations if case is not clear cut
Do not mistake anisotropy for<unk> rupture
Ultrasound: Tendons
Ultrasound: Signs
Ultrasound: Bone
Ultrasound: Pharyngeal
Ultrasound: Pelvic
Ultrasound: Lungs
Ultrasound: Soft tissue
Ultrasound: physics and knobology