Elekta Ab (publ)

Transmode Systems Ab

Håkan Nivestedt

Alain Minoz

Magnus Svevar

Jens Rasmussen

Methods, system, nodes and computer program for transmission of a synchronous data stream having a bitrate, over an asynchronous packet data network between a transmitter node and a receiver node comprising: packaging, by the transmitter node, the synchronous data stream into data packets, transmitting, by the transmitter node, the data packets onto the asynchronous packet data network with a fixed packet rate defined by a first clock frequency which corresponds to the average distance in time between two consecutive data packets transmitted onto the asynchronous packet data network, which is independent of the bitrate of the synchronous data stream, receiving, by the receiver node, the data packets from the asynchronous packet data network detecting, by the receiver node, the fixed packet rate, and based on the fixed packet rate, regenerating, by the receiver node, the first clock frequency by detection of the distance in time between two consecutive data packets received from the asynchronous packet data network.

Methods and nodes for transmission of a synchronous data over packet data network

The present invention relates to a collision detecting device for a radiation treatment apparatus, comprising a radiation unit having an internal space, for directing radiation beams towards a radiological focus in the internal space for treatment of a target in a patient's body therein. The collision detecting device comprises a collision detecting unit being electrically conductive at least on its outer surface and having a size slightly smaller than the internal space of the radiation unit, so as to be insertable into the internal space and held in an electrically insulating manner in respect of the radiation unit by spacer elements. The outer electrically conductive surface is connectible to an electrical voltage supply in order to detect if the outer surface of the collision detecting unit abuts against the inside surface of the radiation unit. The invention also relates to a method for performing such collision detection.

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Sollentuna, Sweden

Håkan Nivestedt