title: A precise CT phantom alignment procedure.
abstract: Two of the AAPM CT performance phantom inserts require precise alignment. We present a method for aligning an insert which makes use of the partial volume effect. We demonstrate that the procedure is sensitive to tilts of less than one degree and, using the slice thickness insert, allows reproducible positioning.
mesh_terms: D006801:Humans; D011856:Radiographic Image Enhancement; D014057:Tomography, X-Ray Computed / Q000379:methods*