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Cousins of the Gamma Knife that spin a smaller number of cobalt-60 sources around the head or body, some built into the same gantry as a linear accelerator. Several were developed in China and are cleared in the United States.
The Gamma Knife focuses about two hundred fixed cobalt sources; rotating gamma systems spin fewer sources so their beams cross at the target. Our Scientific's OUR Rotating Gamma System was cleared in 1997 (K970647) and MASEP's Infini in 2011 (K102533). Our United Corporation of Xi'an holds three clearances: TaiChiA, a kV image-guided linac (K193207, 2020); TaiChiC, a cobalt-60 rotating gamma unit (K203250, 2021); and TaiChiB (K210921, 2021), which its 510(k) says "integrates medical linear accelerator technology and rotating gamma technology" in one gantry and which also carries an NMPA registration. Akesis's Galaxy (K190844, 2019) and Xcision's GammaPod for breast (K172706, 2017) are other cobalt designs in the FDA database.
These units trade the Gamma Knife's fixed geometry for body treatment or a combined linac, and the cobalt sources still decay and must be replaced and secured. Peer-reviewed comparisons with linac or Gamma Knife radiosurgery are few; their current market status outside China was not confirmed.
A set of cobalt-60 sources rotates on a ring so that their beams overlap at the isocentre, giving a steep dose gradient; hybrid designs mount a linac on the same gantry.
Query for this technology: (TITLE:"Rotating gamma and hybrid cobalt systems" OR ABSTRACT:"Rotating gamma and hybrid cobalt systems" OR TITLE:"Our United TaiChi, MASEP Infini, Akesis Galaxy, GammaPod" OR ABSTRACT:"Our United TaiChi, MASEP Infini, Akesis Galaxy, GammaPod" OR TITLE:"Rotating gamma system" OR ABSTRACT:"Rotating gamma system" OR TITLE:"TaiChiB" OR ABSTRACT:"TaiChiB") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about Rotating gamma and hybrid cobalt systems (Our United TaiChi, MASEP Infini, Akesis Galaxy, GammaPod), not a curated reading list.
Shares Cobalt-60 teletherapy, Linear accelerator machines: from Clinac to AI-imaging linacs, rings and radiosurgery units and the tag machines-wave3.
Shares Cobalt-60 teletherapy, Linear accelerator machines: from Clinac to AI-imaging linacs, rings and radiosurgery units and the tag machines-wave3.
Shares Linear accelerator machines: from Clinac to AI-imaging linacs, rings and radiosurgery units and the tag machines-wave3.
Shares Brain metastases (secondary brain tumours), Non-small-cell lung cancer and the tag machines-wave3.
Shares Breast cancer (all types), Non-small-cell lung cancer and the tag machines-wave3.
Shares Breast cancer (all types) and the tag machines-wave3.
Shares Breast cancer (all types) and the tag machines-wave3.
Shares Breast cancer (all types) and the tag machines-wave3.
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