The ionization chamber type AEC is:
located above the table top but below the patient
located beneath the table but above the image receptor
located in the tube port
located beneath the table and behind the image receptor
located beneath the table but above the image receptor
Rationale: The ionization chamber is just one type of AEC. The ionization chamber is located beneath the table, but above the image receptor. When the predetermined quantity has occurred and measured by the electrometer, the exposure is terminated.
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