大基医疗 Top Grade Healthcare
大基医疗始创于1997年，是一家集大型医疗设备研发、生产、医院管理于一体的国际性医疗集团。 大基医疗研发和生产的高速派特（PET）是国内生产的、第一台取得SFDA证书的设备，与其他大型医疗设备相匹配，可提供高精度的分子影像和辅助放射性治疗手段。公司总部、研发部门和PET生产基地设立在北京。
大基医疗在瑞典的附属公司Top Grade AB，专注于研发放射治疗设备，其中，电子直线加速器LA45是放射物理、放射化学和生物效应的完美结合，是第一个获取美国FDA认证的高能量直线加速器最高可达45MeV。

 Top Grade Healthcare
Top Grade Healthcare, found in 1997, is an international healthcare group which focuses in the development and manufacturing of large medical equipments as well as hospital management. The high-speed PET scanner, which is China's first system approved by SFDA, provides high-resolution molecular imaging and guided radiological procedures, and can integrate with existing medical imaging modalities. The company's headquarter, the R&D center, and PET scanner production facilities are located in Beijing, China.
The subsidiary, Top Grade AB, is based in Sweden and focuses on developing radiotherapy equipments. The Medical Linear Accelerator (LA45) is a perfect combination system of radio-physics, radiochemistry and radiobiology. It offers unique Bio-Assessments Radiotherapy (Bio-ART™). It is the first high energy Linac up to 45MeV to obtain FDA approval .