To reduce the burden of labor relating to setting and changing management items in an environment where a plurality of management tools are used. 8 g per square metre of specific surface developed by the aggregates of at least one cationic polymer in the liquid form having a density of cationic charges greater than or equal to 0. The probe with which impedance is measured may in the form of a patch adhesively secured to the subject. A slide at a bottom of each side wall at least partially fills the gap between the side wall and the endless loop. The packaging device formed by the method has a volume that is only a few times that of the semiconductor die and can be fabricated from materials that can withstand high-temperature die attach processes. The mobile X-ray unit may further include a phantom-based dosimetry system configured to perform a dosimetry check of the X-ray beam.