Learn More
OBJECTIVE A variety of medical robots have been developed in recent years. MRI, including MR angiography and morphological imaging, with its excellent soft-tissue contrast is attractive for the development of interventional MRI-guided therapies and operations. This paper presents a telerobotic device for use in CT- and/or MR-guided radiological(More)
In virtually all safety-critical industries the operators of systems have to demonstrate a systematic and thorough consideration of safety. This is increasingly being done by demonstrating that certain goals have been achieved, rather than by simply following prescriptive standards. Such goalbased safety cases could be a valuable tool for reasoning about(More)
In endoscopic surgery, the ability to guide the instrument is significantly decreased compared with open surgery. Rigid laparoscopic instruments offer only four of the six degrees of freedom required for the free handling of objects in space. Robotics technology can be used to restore full mobility of the endoscopic instrument. Therefore, we designed a(More)
In endoscopic surgery, the ability to guide the instrument is significantly decreased compared with open surgery. Rigid laparoscopic instruments offer only four of the six degrees of freedom required for the free handling of objects in space. Robotics technology can be used to restore full mobility of the endoscopic instrument. Therefore, we designed a(More)
Today's rigid endoscopic instruments limit the intracorporeal mobility of the surgical tool and are a severe impediment for the further spread of endoscopic techniques in operative medicine. Since 1992 flexible, steerable instruments with additional links for pivoting and rotating the tip have been developed and experimentally evaluated. The latest versions(More)
The recent progress in endoscopic surgery, which is highlighted by the complexity of fundoplication, stomach surgery and colorectal surgery, has revealed major restrictions with difficult surgical manipulations. Mobilisation, dissection and suturing techniques are hampered mainly by the limited degrees of freedom of the conventional rigid instruments(More)
In safety-oriented applications, the software has to fulfil certain stringent reliability requirements. In order to determine the reliability of the software, a variety of different methods can be used. The methods used for the reliability proof of a computerized reactor protection system are discussed in this paper. In addition to the constructive approach(More)