Ultrasound…Beyond the Essentials™ – Black Liquor Vacuum ExperiencesUltrasound...Beyond the Essentials / By SDT Ultrasound / Dr. Karl Hoffower feat. Allan Rienstra You must be registered for any one of our courses or Ultrasound...Beyond the Essentials™ Webinar Series. Click here to register or login below if you are already registered. Username or E-mail Password Remember Me Forgot Password