Abstract: A motor assisted movement assembly 2 is provided comprising a motor arrangement 3, which motor arrangement 3 may assist a manually controlled movement of a first structural element 5 relative to a second structural element 6. A motor element 3a of the motor arrangement 3 is adapted to detect a manual indication of a desired movement of the second structural element 6 relative to the first structural element 5 with the motor arrangement 3 being adapted to assist, e.g. support the movement by providing an additional force.

Abstract: A motor assisted movement assembly 2 is provided comprising a motor arrangement 3, which motor arrangement 3 may assist a manually controlled movement of a first structural element 5 relative to a second structural element 6. A motor element 3a of the motor arrangement 3 is adapted to detect a manual indication of a desired movement of the second structural element 6 relative to the first structural element 5 with the motor arrangement 3 being adapted to assist, e.g. support the movement by providing an additional force.

Abstract: 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.

Abstract: 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.