Patent ID: 11883127
Assignee: SIEMENS HEALTHCARE LIMITED
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 13:
14. A combined system therapy and imaging system, comprising:
a radiation therapy apparatus;
a magnetic resonance (MR) imaging apparatus;
a control computer configured to:
operate the MR imaging apparatus to acquire a three-dimensional MR volume data set prior to irradiation of the subject, the three-dimensional MR volume data set containing a target volume for irradiation of the subject with a radiation beam;
determine movement information of the subject;
continuously determine a location of a central beam of the radiation beam relative to the subject;
determine that the location of the central beam has changed during the irradiation of the subject;

calculate during the irradiation of the subject an MR image data set comprising two-dimensional MR slices that are positioned substantially perpendicular to the central beam
in response to the determination that the location of the central beam has changed, calculating, via the combined system during the irradiation of the subject, a changed MR image data set comprising two-dimensional MR slices that are substantially perpendicular to the central beam,
wherein the MR image data set and the changed MR data set are each respectively calculated during the irradiation of the subject without using a recorded MR data set in addition to the three-dimensional MR volume data set that was acquired prior to the irradiation of the subject by (i) using the movement information, and (ii) calculating, from the three-dimensional MR volume data set of the subject recorded prior to the irradiation of the subject, the two-dimensional MR slices of the changed MR image data set;
determine a radiation dose for the irradiation in predetermined regions of the subject using the MR image data set and the changed MR image data set; and
control the irradiation using the determined radiation dose.