A COMPARATIVE-STUDY OF THE MODULATION TRANSFER-FUNCTION OF AN IMAGING PLATE

An important factor to Specify properties of an imaging plate (IP) is the modulation transfer function (MTF) which defines the resolving power of this recording material. The MTF of an IP was measured by comparing the shadow profile of a gold wire directly fixed on an IP with an ideal well-shaped profile, while, additionally, its dependence on the accelerating voltage and also on the irradiated electron dose was studied. The MTF was found not to depend on the accelerating voltage, but to be in close correlation with the irradiated dose. The practical resolution becomes worse with decreasing dosage. The resolving power determined from the MTF value of about 0.15 corresponded to the line resolution determined by the observation of lattice fringes.