Collimators that offer positive beam limitation (PBL) are very popular with technologists for a variety of reasons.Even though the federal requirement for PBL has been repealed, their popularity has continued and most department managers consider PBL as a "standard equipment" feature.PBL is electronically and mechanically highly engineered technology and subject to abuse by the inattentive and unprofessional radiographer.In the event of a PBL failure during an examination, what circumstances will be evident to the radiographer and what can he/she do to overcome the PBL error and continue with the procedure.
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A)employs
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