title: CT alignment probe for the dose profile insert.
abstract: One of the most accepted methods of characterizing the dose in computed tomography (CT) is by measuring the dose profile. Thermoluminescent dosimeters (TLD's) arranged in a stack are scanned in a plexiglass phantom. Unfortunately with this system there is no assurance that the scan properly intercepts the stack. Mispositioning will not be apparent until the TLD's are read, entailing at least a 24 h delay before rescanning. We have designed a simple alignment probe that insures that the scan will be centered on the stack to within 1 mm.
mesh_terms: D006801:Humans; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D013679:Technology, Radiologic; D014057:Tomography, X-Ray Computed