What is the density of the Teflon spine in certain body phantoms?
Our solid spine insert is made of “high density” “virgin” Teflon. Narrow beam measurements of virgin Teflon at 140 keV yielded a mu (cm-1) value of 0.2853. Just FYI, if you should have a special order solid spine insert made of “mechanical” Teflon, this material has a measured mu (cm-1) at 140 keV of 0.2892. At 140 keV, both materials have essentially the same mu value. Other methods of determining density: A. If you have access to a calibrated TCT scanner, you can of course perform a scan of the material in question and get the “CT number” of the material from the images via regions of interest. You may have to include in this or other scans materials of known density, such as water, iodinated contrast material, etc., and then extrapolate CT numbers back to mu values for your particular object/material. B. You can perform your own determination of mu value. Using a narrow, highly collimated radiation beam from your specific radionuclide or X-ray source, measure the beam intensity with
