It will be used for x-ray absorption studies in the human body as well as the dose fall off with depth.
I am using a PMMA container volume 35x38x40
How very interesting, dear Darrion.
I'll look for morphometric analysis of the pelvic cavity, (if there are any...)
Either use a standard anthromorphic phantom to evaluate volume or take a set of cohot minimum 100 people and measure the parameter and think it is a cuboid and calculate the volume...
Make a Plaster of Paris (POP) cast of the pelvis of an average person, or few persons, close one end and measure its volume. Or ask your Radiologist to get from ct images.
Narayanan
I agree with Jasna. For dosimetric purposes, the volume of water you need to use is not necessarily equal to the volume of the pelvic cavity. The pelvic cavity is not entirely filled with organs with water equivalent density, but has a rather non homogeneous filling with organs and tissues of different densities. If you need to estimate the organ doses, than an homogeneous phantom will not do, you need to build an anthropomorfic phantom close enough to the real situation. If you only need to estimate the PDDs in the pelic cavity, than the easiest way would be to use an average density and then convert it into water density and thus calculate the volume of water you need. But the best approach is still to use an appropriate anthropomorfic phantom for the pelvis (I trust you can find something at CIRS, for instance) because even for the PDDs the X ray scattering is important.
Darrion, you can find here an example of pelvic cavity phantom: http://www.cirsinc.com/file/Products/002PRA/002PRA_DS_070113.pdf
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