Koninklijke Philips Corporation N.v.

Elekta Ab (publ)

Philips Intellectual Property & Standards Gmbh

Johan Overweg

Volkmar Schulz

Torsten Solf

Andreas Thon

Gordon D DeMeester

Michael Andrew Morich

Duncan Neil Bourne

Christopher Charles Knox

Jan Rietema

In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.

PET/MR scanners for simultaneous PET and MR imaging

We provide a radiotherapeutic apparatus comprising a patient support, magnetic coils disposed around the patient support for creating a magnetic field therewithin, a radiation source producing a beam of radiation directed toward the patient support and mounted on a rotatable support thereby to rotate the radiation source around the patient support, a slip ring for conveying electrical power to the radiation source and located around the patient support, including at least one electrical interruption therein. This creates a slip ring in which there is no continuous circumferential path, and one in which the current is therefore forced to take a route via one side or the other.

Radiotherapeutic apparatus

A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180&#xb0; angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings.

Split gradient coil and hybrid systems using same

Split gradient coil and PET/MTI hybrid system using the same

A generally cylindrical set of coil windings () includes primary coil windings () and shield coil windings () at a larger radial position than the primary coil windings, and an arcuate or annular central gap () that is free of coil windings, has an axial extent (W) of at least ten centimeters, and spans at least a 180&#xb0; angular interval. Connecting conductors () disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet () is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors () is disposed in the central gap of the generally cylindrical set of coil windings.

Split gradient coil and PET/MRI hybrid system using the same

In a combined system, a magnetic resonance (MR) scanner includes a magnet () configured to generate a static magnetic field (B) at least in a MR examination region () from which MR data are acquired. Radiation detectors () are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region (). The radiationdetectors include electron multiplier elements () having a direction of electron acceleration (ae) arranged substantially parallel or anti-parallel with the static magnetic field (B). In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces () disposed on opposite sides of a magneticresonance examination region, and the radiation detectors include first and second arrays () of radiation detectors disposed with the first and second spaced apart magnet pole pieces.

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Uelzen, Germany

Johan Overweg