Abstract:
The invention relates to a method of selecting a set of beam geometries for use in radiation therapy. The method (10) comprises providing (12) a plurality of candidate beam geometries; optimizing (1) a radiation treatment plan with all candidate beam geometries; and computing (14) a cost function value based on all candidate beam geometries. A first beam geometry from the plurality of candidate beam geometries is removed (15) and a first modified cost function value based on the candidate beam geometries without the removed first beam geometry computed (16). The first beam geometry is restored (17). The steps of removing a beam geometry, computing of a modified cost function value and restoring of the removed beam geometry are repeated (R) for all other candidate beam geometries. One or more beam geometries from the plurality of candidate beam geometries based on the modified cost function values are chosen (19).
Abstract:
본 발명은 생체적합성 고분자가 코팅되거나, 생체적합성 접착제가 코팅되거나, 체내 삽입 의료용 금속물질을 체내에 삽입한 후에 생체적합성 접착제를 주입하거나, 접이식 앵커가 구비되는 체내 이동방지 수단이 구비된 체내 삽입 의료용 금속물질에 관한 것으로, 본 발명에 따른 체내 조직에 삽입시 그 이동을 방지할 수 있는 수단이 상기 금속물질 표면에 부착되어 있는 것을 특징으로 하는 체내 삽입 의료용 금속물질은 체내 삽입 후 이동이 방지되므로, 방사선근접치료에 사용하는 방사성동위원소 선원, 영상유도방사선치료의 정밀성을 위해 사용되는 기점마커, 수술실에서 사용되는 외과수술용 클립, RF(radio frequency) 발생용 트랜스폰더(transponder) 등과 같은 체내에 삽입되는 의료용 금속물질에 유용할 수 있다.
Abstract:
Toroidal superconducting magnets can be used as lightweight rotating bending magnets in hadron therapy gantries. The toroidal bending magnets are self-shielded and do not require ferromagnetic material for field modification or shielding, decreasing both the magnet system weight, as well as overall gantry weight. Achromatic magnet can be made by combining two of these bending magnets. The simple geometry may allow the use of higher fields, making it attractive for carbon, as well as proton.
Abstract:
Systems, methods, and related computer program products for image- guided radiation treatment (IGRT) are described. Provided according to one preferred embodiment is an IGRT apparatus including a barrel-style rotatable gantry structure that provides high mechanical stability, versatility in radiation delivery, and versatility in target tracking. Methods for treatment radiation delivery using the IGRT apparatus include conical non-coplanar rotational arc therapy and cono-helical non-coplanar rotational arc therapy. A radiation treatment head (MV source) and a treatment guidance imaging system including a kV imaging source are mounted to and rotatable with a common barrel-style rotatable gantry structure, or alternatively the MV and kV sources are mounted to separate barrel-style rotatable gantry structures independently rotatable around a common axis of rotation. Methods for intra-fraction target tracking in a gantry-style IGRT system based on comparisons between a pre- acquired planning image and intrafraction x-ray tomosynthesis images and/or intrafraction cone beam CT (CBCT) images are also described.