What technique error occurred in this image?

Your patient is concerned about the amount of x-ray exposure she has had because she had x-rays taken quite often at her previous dental office. You explain to her that the images are necessary and you will be taking digital images which require _________ exposure than the films she previously had taken

Dental images should be viewed as if you are facing the patient, meaning the patient’s left side is on your right and the patient’s right side is on your left.

Each of the following conditions must exist for x-rays to be produced EXCEPT one. Which one is the EXCEPTION? 

Where does the generation of x-rays in the tube actually occur?

Which government passed a law called “The new Personal Information International Disclosure Protection Act” to protect their citizens from having any information provided through PATRIOT Act investigations?

________, a form of racist propaganda, was found in the automobile of Timothy McVeigh when he was arrested after the bombing of the Murrah Federal Building in Oklahoma City, Oklahoma.

All of the following are advantages of using bite tabs EXCEPT one.  Which one is the EXCEPTION?

________, a form of racist propaganda, was found in the automobile of Timothy McVeigh when he was arrested after the bombing of the Murrah Federal Building in Oklahoma City, Oklahoma.

Use the diagram to answer the question below   What is #21 indicating?