Patent ID: 11904186
Assignee: THE UNIVERSITY OF HONG KONG—SHENZHEN HOSPITAL
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A radiotherapeutical or radiosurgical system comprising:
at least two radiation sources configured to rotate around a common rotation axis and to target at or aim at a common point on the common rotation axis;
wherein the common point on the common rotation axis is defined as an isocenter, and a predetermined treatment target is located at the isocenter;
wherein a first radiation source of said at least two radiation sources emits a first radiation beam, which irradiates upon the predetermined treatment target from a first direction along a central axis of the first radiation beam, and a first angle α1 is defined as an angle between the first direction and the common rotation axis;
wherein a second radiation source of said at least two radiation sources emits a second radiation beam, which irradiates upon the predetermined treatment target from a second direction along a central axis of the second radiation beam, and a second angle α2 is defined as an angle between the second direction and the common rotation axis;
wherein, when said at least two radiation sources are rotating around the common rotation axis, the first angle α1 and the second angle α2 are independently of each other constant or being varied or being changed; wherein, when the first angle α1 and the second angle α2 are independently of each other being varied or being changed, the first angle α1 and/or the second angle α2 is/are being varied or being changed within a magnitude of less than ±15° of initial values of the first angle α1 and/or the second angle α2 before said at least two radiation sources start to rotate around the common rotation axis;
wherein, when said at least two radiation sources are rotating around the common rotation axis, it always remains that at least α1≠α2, regardless whether the first angle α1 and the second angle α2 are independently of each other constant or being varied or being changed; and
wherein the at least two radiation sources comprise linear accelerators (LINACs) or other compact radiation sources that have a dose rate at least higher than 3 Gy/minute in a 100-cm source-to-predetermined treatment target distance for each source of said at least two radiation sources.