CT alignment probe for the dose profile insert.
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.
D006801:Humans; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D013679:Technology, Radiologic; D014057:Tomography, X-Ray Computed