Method and a system for obtaining operating parameters for x ray data acquisition

A method for obtaining operating parameters for x-ray imaging a patient's maxillofacial region, the method comprising the steps of:

• identifying a patient's maxillofacial first region of interest (ROI1);
• determining a height of a horizontal plane of said patient's maxillofacial first region of interest (ROI1) when the patient is in an occlusion position or bites a patient positioning accessory, said horizontal plane passing through the teeth and the bones of the jaw;
• acquiring through a slit-shaped collimator window a first set of data relative to said patient's maxillofacial first region of interest (ROI1) including the horizontal plane using x-ray CBCT imaging and a first x-ray dose, said first set of data comprising a first set of x-ray images including the horizontal plane obtained at different angular positions relative to the patient's maxillofacial first region of interest (ROI1) and suitable for generating a CBCT slice;
• reconstructing the CBCT slice comprising the horizontal plane based on the first set of data relative to the patient's maxillofacial first region of interest (ROI1);
• and
• obtaining operating parameters for an x-ray imaging apparatus based on the reconstructed CBCT slice in view of acquiring a second set of data of a patient's maxillofacial second region of interest (ROI2) using a second x-ray dose, the first x-ray dose being lower than the second x-ray dose.