With reference to the treatment of cancerous tumours, a tool called cyberknife has been making the news. In this context, which one of the following statements is not correct ?

CyberKnife is a non‑invasive, image‑guided robotic radiation delivery system — a linear accelerator mounted on a robotic arm that delivers stereotactic radiosurgery and SBRT with real‑time image guidance and beam tracking. The system is specifically promoted for its extremely precise dose delivery and end‑to‑end sub‑millimetre accuracy, minimizing dose to surrounding healthy tissue. These descriptions establish CyberKnife as a treatment‑delivery platform rather than a diagnostic staging tool. Mapping tumour spread (staging, detecting metastases) is the role of diagnostic imaging modalities (e.g., PET/CT, MRI) and clinical workup; such diagnostic mapping is separate from CyberKnife’s therapeutic delivery function.