This paper describes an improvement on Stanton's original design. It combines an useful feature of the Ardran and Crdoks method with the Stanton method. The device employs a polyethylene reference block alongside adjacent copper wedges. To determine the kVp, the kVp test tool is placed over a conventional X-ray cassette containing a fresh sheet of film and an appropriate exposure,is made at the kVp which one wishes to measure. We used two thicknesses of brass to test the sensitivity of the wedge to spectral changes. The results indicate that the device is useful for measuring kVp over the diagnostic X-ray range (45-110 kVp).

This paper describes an improvement on Stanton's original design. It combines an useful feature of the Ardran and Crdoks method with the Stanton method. The device employs a polyethylene reference block alongside adjacent copper wedges. To determine the kVp, the kVp test tool is placed over a conventional X-ray cassette containing a fresh sheet of film and an appropriate exposure,is made at the kVp which one wishes to measure. We used two thicknesses of brass to test the sensitivity of the wedge to spectral changes. The results indicate that the device is useful for measuring kVp over the diagnostic X-ray range (45-110 kVp).