There is provided a rescue requesting method using Bluetooth wireless communication technology. The noise detected is used to create an actual noise signature for the actual noise present in that particular examination under existing environmental conditions and in the imaging system itself, and the noise signature is used to maximize available dynamic range to create the highest resolution scan images possible while rejecting noise. The passage surface provides an opening which is in fluid connection with the sections of the intake manifold and which is sealed to such sections using an O-ring or flat style gasket, based upon the application. Oxygen and fuel are fed into the furnace in controlled proportion to each other and combustion is controlled to produce a flame temperature in excess of 3000 degrees F.