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?

1. The question asks which statement about the CyberKnife tool used for treating cancerous tumours is *not* correct. 2. Statement (A): The CyberKnife is known to be a robotic image guided system. It uses real-time imaging to track tumor and patient movement during treatment. This statement is correct. 3. Statement (B): It is a form of stereotactic radiosurgery/radiotherapy that delivers an extremely precise dose of radiation to the tumor from multiple angles. This statement is correct. 4. Statement (C): Due to its robotic precision and image guidance, it has the capability of achieving sub-millimetre accuracy in targeting the radiation dose. This statement is correct. 5. Statement (D): The CyberKnife is a treatment delivery system. While it uses imaging to target the known tumor accurately, it does not map the spread of tumour in the body. Mapping the extent and spread of cancer typically involves diagnostic imaging techniques like PET scans, CT scans, or MRI scans, which are done prior to treatment planning. This statement is *not* correct. 6. Therefore, statement D is the one that is not correct.