How Tomosynthesis Changes the Evaluation of PLIF Bone Union

3 1. Purpose Tomosynthesis is a new radiography technique that takes tomographic images with only one-tenth the exposure dose of CT. It is said to permit rapid radiographic imaging of patients in various postures and dramatically cut metal artifacts. We performed bone union evaluation after posterior lumbar interbody fusion (PLIF) using tomosynthesis and investigated the utility of this technique by comparing it to existing evaluation techniques using radiography and CT.