Reduced divergence electromagnetic field configuration

Details Reduced divergence electromagnetic field configuration Reduced divergence electromagnetic field configuration

A - Human Necessities

61

N

A61N 5/10 (2006.01) G21K 5/00 (2006.01)

Patent

CA 2525600

A photon beam dose enhancement is controlled by configuring at least two magnets in a staggered opposing coil configuration, such that the first central field vector of the first magnet is more anti-parallel than parallel to the second central field vector of the second magnet. In one form, the first central field vector of the first magnet is rotated between .plusmn. 90o to 180o to the second central field vector of the second magnet. Typically, the first central field vector is non~coaxial with the second central field vector. The resulting magnetic field configuration has a larger portion of higher magnitude magnetic field that can reach deeper into a target body and provides additional space within the region of higher magnitude that can accommodate larger portions of a body.

Selon l'invention, l'augmentation d'une dose de faisceau photonique est régulée par disposition d'au moins deux aimants selon une configuration en bobines opposées décalées de sorte que le premier vecteur de champ central du premier aimant soit plus antiparallèle que parallèle par rapport au second vecteur de champ central du second aimant. Selon une variante, le premier vecteur de champ central du premier aimant peut tourner de ? 90· à 180· par rapport au second vecteur de champ central du second aimant. Habituellement, le premier vecteur de champ central est non coaxial par rapport au second vecteur de champ central. La configuration de champ magnétique résultante comprend une partie plus grande de champ magnétique d'amplitude supérieure pouvant atteindre une zone plus profonde dans un corps cible, et fournit un espace additionnel à l'intérieur de la région d'amplitude supérieure pouvant recevoir des parties plus grandes d'un corps.

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