What is the first imaging study typically performed for suspected testicular torsion?

Color Doppler ultrasound is the first imaging study typically performed for suspected testicular torsion because it is non-invasive, readily available, and can quickly assess blood flow to the testis. In testicular torsion, there is a decrease or absence of blood flow to the affected testis, which can be visualized using Doppler ultrasound. This imaging modality allows clinicians to evaluate both the size and the blood flow of the testes, helping to confirm or rule out torsion efficiently.

Other imaging options, such as CT scans and MRIs, are more complex, less accessible in an emergency setting, and may expose the patient to unnecessary radiation or require longer imaging times. X-rays are not helpful in diagnosing testicular torsion as they do not provide information regarding the vascular status of the testes. Therefore, Color Doppler ultrasound is the preferred initial imaging technique for this condition.