What's wrong with lumbar anteroposterior photography is that

incorrect positioning and incomplete exposure.

1. Wrong positioning: Accurate positioning is very important in lumbar anteroposterior photography. Doctors or technicians have not positioned the patient's lumbar spine correctly, so they can't get a clear image or aim the photographic target at the required lumbar region. This leads to missing some abnormalities or variations, or misdiagnosis when evaluating patients' lumbar diseases.

2. Incomplete exposure: The anteroposterior photography of lumbar spine needs to ensure the sufficient exposure of lumbar bones and surrounding structures for accurate evaluation. In the process of photography, there is incomplete exposure, which will cause blurred images or lack of details, making diagnosis or evaluation difficult.