Complex sentence: A doppler ultrasound scan of the scrotum is nearly 90% accurate in diagnosis identifying the absence of blood flow in the twisted testicle, which distinguishes torsion from epididymitis.
Split into simpler sentences: A doppler ultrasound scan of the scrotum is nearly 90% accurate at detecting torsion. It is identified by the absence of blood flow in the twisted testicle, which distinguishes the condition from epididymitis.