An ultrasound medical treatment system includes an end effector insertable into a patient. The end effector includes a tissue-retaining device. The tissue-retaining device includes a first tissue-retaining member having an ultrasound medical-treatment transducer and includes a second tissue-retaining...http://www.google.de/patents/US7806892?utm_source=gb-gplus-sharePatent US7806892 - Tissue-retaining system for ultrasound medical treatment
