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. 2012 Jan 5;13(1):148–163. doi: 10.1120/jacmp.v13i1.3585

Figure 6.

Figure 6

Accuracy of the step‐wedge procedure: field width. Field width in longitudinal direction is measured with an ion chamber in solid water and by analysis of the time profile of the step‐wedge phantom, measured with the MVCT detector.