An electromagnetic wave absorber includes: a first layer having a first enclosing layer that encloses an electromagnetic wave radiator, and a first metal film formed on the first enclosing layer.

A shielded enclosure receives REID-tagged packaging from consumed medical items. The enclosure includes a housing and a lid. An opening in the lid receives the packaging into an internal space. A chute surrounds the opening and extends downward into the internal space. The chute has front, left, right, and rear walls. A hood attached to the lid surrounds the opening. An aperture in the hood allows passage of the packaging into the lid opening. The hood includes rear, right, left, and top walls. RF absorbing material covers inside surfaces of the chute and hood, including a front panel on the chute front wall, a rear panel on the hood rear wall and the chute rear wall, a left side panel on the hood left side wall and the chute left side wall, a right side panel on the hood right side wall and the chute right side wall, and a top panel on the hood top.

Systems are provided for a medical imaging system. In one example, an electronic assembly configured to control a cathode of an X-ray tube of the medical imaging system comprises a plurality of boards comprising a first analog board, a first digital board, a second power board, and a third power board, and at least two Faraday cages nested within one another, the at least two Faraday cages comprising an inner Faraday cage surrounding the first digital board and an outer Faraday cage surrounding each of the plurality of boards and the inner Faraday cage.

Systems are provided for a medical imaging system. In one example, an electronic assembly configured to control a cathode of an X-ray tube of the medical imaging system comprises a plurality of boards comprising a first analog board, a first digital board, a second power board, and a third power board, and at least two Faraday cages nested within one another, the at least two Faraday cages comprising an inner Faraday cage surrounding the first digital board and an outer Faraday cage surrounding each of the plurality of boards and the inner Faraday cage.