Do regular ct scans show unruptured aneurysms?

CT scan: It depends what do you call a regular ct scan but usually IV contrast dye is needed to visualize the aneurysm. There are non contrast exams and others where IV contrast is employed. Where is the aneurysm located ?. If it's large and calcified and perhaps located in the abdomen or chest it can be suggested by the non contrast ct. An ultrasound can detect readily in the abdominal aorta.