Sagemark Companies Ltd. (The). The Group's principal activity is to acquire, organize and operate positron emission tomography centers. The centers use diagnostic procedures that detect cancer in the human body. The Group has a positron emission tomography center in Wichita, Kansas. The Group currently owns and operates PET centers in Wichita, Kansas and Parsipanny, New Jersey. The PET procedures requires the use of flouro-deoxy-glucose and positron emission tomography scanning equipment.