To evaluate the patient-level early diagnostic performance of high-penetration super-resolution transcranial ultrasound for identifying intracranial metallic targets, and to further assess clip-level detection, localization, agreement, and its complementary value to routine postoperative imaging.This study does not alter routine clinical treatment. All participants will undergo standardized high-penetration super-resolution transcranial ultrasound within 3 hours after surgery. Postoperative CT is mandatory for all participants; CTA or other routine postoperative imaging will be obtained only when clinically indicated.
Age 18-85 years;
Positive group: patients undergoing intracranial aneurysm clipping with implanted metallic clips; negative control group: postoperative craniotomy patients without implanted clips;
Ability to complete transcranial ultrasound within 3 hours after surgery;
Availability of postoperative CT;
Inability to complete standardized transcranial ultrasound;
Missing postoperative CT;
Inability to establish the composite reference standard;
Presence of non-study-related metallic materials that may substantially interfere with target identification;