To demonstrate the ramus of the mandible with the axiolateral oblique projection, position the head as follows:

To demonstrate the ramus of the mandible using the axiolateral oblique projection, you would position the patient’s head in a specific way to get the best view of that particular section of the mandible. Here is a step-by-step guide to positioning:

1. The patient should be seated or standing, depending on the equipment you use and the patient's condition.

2. Have the patient turn their head to position the side of interest closest to the image receptor. If you are imaging the left ramus, for instance, the left side of the face would be nearest to the film or detector.

3. Tilt the head about 25 degrees toward the image receptor. This tilt helps to spread the ramus away from the skull to reduce overlapping structures.

4. Rotate the head so that the ramus of interest is parallel to the image receptor. Typically, this involves a rotation of about 45 degrees toward the image receptor for the side being imaged.

5. Position the central ray of the X-ray beam to enter at about a right angle to the image receptor, directed at the mandibular ramus. It often enters just below the external auditory meatus, or ear canal, but this can vary based on the specific protocol of your radiology department.

6. Instruct the patient to stay very still during the exposure to prevent blurring.

7. Adjust the exposure settings according to the patient's size and the area of interest.

8. Take the X-ray.

It is crucial to follow proper safety procedures and use protective equipment to minimize radiation exposure to the patient and radiology personnel.