What is the fine-grained topic of the following text: TUESDAY, Nov. 27, 2018 (HealthDay News) — Computed tomography (CT)-guided pulsed radiofrequency (pRF) is effective for patients with acute or subacute neuroradicular low back pain that is refractory to usual care, according to a study presented at the annual meeting of the Radiological Society of North America, held from Nov. 25 to 30 in Chicago. Only return the topic.
Effectiveness of CT-guided pulsed radiofrequency for treating neuroradicular low back pain.