Doppler-controlled needle director: a useful adjunct to angiography.
D000792:Angiography / Q000295:instrumentation*; D002404:Catheterization / Q000295:instrumentation*; D006801:Humans; D009339:Needles; D011677:Punctures / Q000295:instrumentation*; D013679:Technology, Radiologic; D014465:Ultrasonics