Bottle Manikin Absorption (BOMAB) Phantoms
The bottle manikin absorption (BOMAB) phantom consists of 10 high-density polyethylene containers that assemble to represent the ICRP 23 Reference Man human body. It has been used as a standard calibration geometry for over 25 years. The 0.2 to 0.5-mm-thick containers contain a semi-solid polyurethane tissue-substitute with radiation attenuation characteristics matching ICRU 44 average soft tissue. The solid tissue substitute has proven tissue-equivalence and none of the limitations found with water-filled BOMAB phantoms, such as radionuclide plate-out, the potential for leakage, biological growths, and shipment difficulties. The BOMAB polyethylene shells do not have the large variation in wall thickness that is found with Roto-molded bottle phantoms.
The BOMAB phantom is used primarily as a calibration standard for Reference Man measurements of homogeneously distributed radioactive materials that emit mid- and high-energy photons. Smaller sizes representing the Reference Female (ICRP 23) and a 4-yr old child are also available.
The tissue substitute used in the BOMAB phantom is a polyurethane-based filler. It has excellent handling characteristics and durability. The plastic matrix contains National Institute of Standards and Technology (NIST) Standard Reference Materials (SRM) or NIST-traceable radioactive materials uniformly distributed throughout the polyurethane. Chemical additives are incorporated to provide the a 40K background in most of the phantoms and to duplicate the transmission characteristics of soft tissues. Specific material constituents and chemical compositions are provided for each phantom.
|Container||Quantity||Cross section Shape||Cross section
|2. Neck||1||circular||13 dia||10||1030|
|5. Arms||2||circular||10 dia||60||3800 (2)|
|6. Thighs||2||circular||15 dia||40||6050 (2)|
|7. Calves||2||circular||12 dia||40||3745 (2)|
|Phantom ID#||Radionuclide||Calibration Date||Activity (nCi)