Table 1.

Material compositions and densities of simulated phantom and structure volumes.

Material (structure)	Density (g/cm3)	Stochiometric formula	Atomic composition
G4_AIR	1.2 × 10-3	−	C(0.01%), N(75.5%), O(23.2%), A(1.3%) [16]
G4_WATER	1.00	H2O	H(11.2%), O(88.8%) [16]
G4_STAINLESS-STEEL (table)	8.00	−	Fe(74.0%), Cr(18.0%), Ni(8.0%) [16]
PMMA (phantom)	1.19	C5H8O2	C(60.0%), H(8.0%), O(32.0%) [17]
HDPE (RPLD capsule)	0.96	C2H4	C(14.4%), H(85.6%)
FD-7 (RPLD glass)	2.61	−	Ag(0.17%), Al(6.12%), Na(11.0%), P(31.55%), O(51.16%) [10]
PA12 Polyamide (catheter)	1.01	C12H23NO	C(73.0%), H(11.8%), N(7.1%), O(8.1%)