A microfocus x-ray tube is useful to perform magniﬁcation digital radiography, including phase-contrast effects. The 100-m-focus x-ray generator consists of a main controller for regulating the tube voltage and current, and a tube unit with a high-voltage circuit and a ﬁxed anode x-ray tube. The maximum tube voltage, current, and electric power are 105 kV, 0.5 mA, and 50 W, respectively. Using a 3-mm-thick aluminum ﬁlter, the x-ray intensity is 26.0 Gy/s at 1.0 m from the source, with a tube voltage of 60 kV and a current of 0.50 mA. Because the peak photon energy is approximately 35 keV using the ﬁlter with a tube voltage of 60 kV, the bremsstrahlung x-rays are absorbed effectively by iodine-based contrast media with an iodine K-edge of 33.2 keV. Magniﬁcation angiography is performed by three-fold magniﬁcation imaging with a computed radiography sys-tem using iodine-based microspheres 15 m in diameter. In angiography of nonliving animals, we observe ﬁne blood vessels approximately 100 m with high contrasts.