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Man 43 yo, one week ago, pain at his left hip while moving his thigh, no trauma history.
Ultrasound first saw the left hip joint having a small amout of fluid collection and more Power Doppler in muscles around the hip ( see 4 US images).
MSCT was done but radiologist said nothing abnormal detected.
MRI detected abnormal head of left femur bone looked like aseptic necrotic femoral head.
Please compare diagnostic values of 3 diagnostic modalities for this case:ultrasound, MSCT and MRI.