A lesion’s type and location, and the number of muscles that a needle has to pierce to reach it, rather than the number of procedures, determine the level and duration of pain after radiofrequency ablation of osteoid osteomas, according to Mayo researchers.

As percutaneous transluminal angioplasty and stent placement replaces bypass surgery in the treatment of peripheral arterial disease, cardiologists and surgeons now are performing far more of the procedures than radiologists, according to research presented Thursday at the RSNA meeting.

Computer-aided detection systems show high potential for detecting inconspicuous colonic polyps but provide little help in locating nonpolypoid colorectal lesions, according to research presented Wednesday at the RSNA meeting.

A new kind of self-mutilation is creeping into the teenage population, one that involves inserting objects into the body, according to radiologist Dr. William E. Shiels, II, who presented the first study of the adolescent phenomenon at the RSNA conference Wednesday.

Results from the largest and longest trial of its kind suggest that patients with intermediate and advanced hepatocellular carcinomas who undergo systematic treatment with three chemotherapeutic agents and arterial embolization plus imaging follow-up have better survival rates than those who undergo nonstandardized chemoembolization regimes.