Medical instrument for magnetic resonance imaging guided radiotherapy

A medical instrument for magnetic resonance imaging guided radiotherapy, the medical instrument comprising:

• a magnetic resonance imaging system configured to acquire magnetic resonance data from an imaging zone, wherein the magnetic resonance imaging system includes:
• a radiation window,
• a coil element disposed within the radiation window,
• an amplifier, wherein the amplifier is connected to the coil element and is configured to amplify an RF signal received by the coil element, wherein the amplifier is disposed outside the radiation window, and
• at least one radiation transparent electrical transmission line, wherein the radiation transparent electrical transmission line is connected to the amplifier and is configured for transmitting an analog electrical signal from the amplifier disposed outside the radiation window, through the radiation window from a first side of the radiation window to a second side of the radiation window which is opposite the first side;
• and
• a radiation source configured to emit X-ray or gamma ray radiation directed at a target zone within the imaging zone, wherein the radiation from the radiation source directed to the target zone passes through the radiation window of the magnetic resonance imaging system.