An agricultural row unit includes an attachment frame adapted to be rigidly connected to a towing frame, and a linkage assembly pivotably coupled to the attachment frame to permit vertical pivoting movement of the linkage assembly relative to the attachment frame. The soft polymer particles contain, as copolymerized units, 70 to 99. A plurality of external contact pads are placed over the second main surface of the encapsulation body, the metal layer electrically coupling at least one external contact pad of the plurality of external contact pads to the ring-shaped metal structure. The armrests at each side of the wheelchair pivot upwardly and rearwardly of the chair. An electrical signal representative of the scatter level is subtracted from the electrical signal representative of the radiation transmitted through the subject, to obtain a scatter-compensated image signal.