What is the standard cassette size for a lateral cervical X-ray?

The standard cassette size for a lateral cervical X-ray is indeed 10"x12". This size is commonly used because it adequately captures the anatomical structures of the cervical spine while maintaining a balance between image quality and radiation exposure. The dimensions help ensure that the entire cervical region is visualized, including the upper cervical vertebrae down through the lower cervical spine.

Using a larger cassette could result in unnecessary exposure to surrounding tissues, while a smaller cassette might not include the necessary anatomical details, potentially leading to missed diagnoses. The 10"x12" size is widely accepted in radiological practices specifically for this purpose, which is why it is considered the standard for lateral cervical X-rays.