A.Transducer touches the point where the needle penetrates the skin.

B.Target is as close as possible to the side of the transducer where the needle will be inserted.

C.Needle angle relative to the transducer is minimized.

D.Needle crosses the plane of the transducer.

A.Dead elements

B.Cracks in the piezoelectric crystals

C.Electrical leakage

D.Gouges on the lens material

A.Misaligned time-gain compensation

B.Increased number of air bubbles in the transducer gel that may impede sound waves

C.Damage to the transducer cable

D.Cracks in the transducer that may indicate breakage of piezoelectric crystal elements

A.Osteophytes and meniscal cyst

B.Osteophytes and distension and calcification of the medial collateral ligament

C.Osteophytes and rupture of the medial collateral ligament

D.Osteophytes, distension of the medial collateral ligament, and meniscal degeneration

A.Tenosynovitis

B.Presence of enthesopathy with hyperemia

C.Reverberation artifact

D.Normal medial genicular artery signal