How is ovarian torsion typically diagnosed?

Ovarian torsion is commonly diagnosed using a pelvic ultrasound, which is the most effective imaging modality for evaluating this condition. The ultrasound can provide real-time assessment and detect characteristic signs of torsion, such as an enlarged, edematous ovary and the absence of venous or arterial flow. Doppler studies can be particularly useful in this scenario as they allow for the visualization of blood flow to the ovary.

Other imaging modalities like CT scans and MRIs may not be as practical for diagnosing ovarian torsion due to their higher cost, longer acquisition times, and potential exposure to radiation or contrast agents. X-rays are not useful in diagnosing ovarian torsion and typically do not provide any relevant information regarding soft tissue structures such as the ovaries. Therefore, the pelvic ultrasound is the preferred method, making it the correct choice in the context of diagnosing ovarian torsion.