An image forming apparatus to reduce time required for printing consecutive pages of printing data and an image forming method thereof. The diffusion media is a permeable sheet that is rigid along a transverse axis, flexible along a lateral axis and has a substantially incompressible thickness. In some such embodiments, the one or more logging tool transmit information about the cased wellbore to the surface wirelessly. The optical speckle pattern is representative of the heartbeat and by correlation of frames extracted from the speckle pattern, the pulse or beat extent of the body part may be ascertained. An alternate embodiment carrier includes a board to which multiple interconnects are molded or laminated.