The treatment of patients using superficial and orthovoltage radiotherapy is quite different to that of megavoltage or isocentric treatment techniques. For example, superficial and orthovoltage treatments enhance patient comfort, where possible, while still ensuring their stability; if this means the patient is to be treated sitting rather than lying on the treatment couch, then this can be easily achieved.

Superficial and orthovoltage machines are specifically designed to enable a full range of movement over several different planes, thus making it ideally suited to the variety of techniques used in the treatment of benign and malignant conditions [1].

Compared to an isocentric treatment, there are no predefined gantry or collimator angles; treatment accuracy is purely down to the expertise and skill of the radiographer who must accurately fit the machine to the patient.

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