MEDICAL APPARATUS PROVIDED WITH A COLLISION DETECTOR

摘要

A medical apparatus for (radiation) diagnosis or therapy can be provided with moving parts (6). Such an apparatus must be provided with a collision detection device (26, 28, 30). A known collision sensor measures the supply current for the drive motor and hence induces a high degree of inaccuracy in the collision detection. According to the invention the force applied to the moving part (image intensifier 6) is measured directly on the relevant part so as to be compared with an expected value, an alarm signal being generated when a threshold value for the difference is exceeded. The expected value is calculated while taking into account all movement and acceleration parameters of the apparatus. The expected values can be calculated in advance and stored in a look-up table or can be calculated, preferably while using a model of the apparatus, during operation of the apparatus.