. Author manuscript; available in PMC: 2019 Mar 1.

Published in final edited form as: Radiat Res. 2018 Mar;189(3):312–325. doi: 10.1667/RR14923.1

TABLE 1.

Summary of Parameters Used in the Track Structure Model of Changes to Dendritic Morphology

Parameter	Symbol	Units
Mean particle fluence	F	Number per μm²
Linear energy transfer	LET	keV/μm
Absorbed dose	D_F	Gy
Impact parameter (radial distance from particle to dendritic segment or soma)	b	Microns (μm)
Radial dose	D(b)	Gy
Dendritic segment diameter	d_Cyl	Microns (μm)
Dendritic segment volume	V_cyl	Cubic microns (μm³)
Frequency mean specific energy in dendrite cylindrical segment	z_F(b, d_Cyl)	Gy
Absorbed dose corresponding to reduction in dendritic length by one-half	D_HV	Gy
Damage response-sensitivity parameters
Sensitivity parameter for soma apoptosis	D_TH,S	Gy
Sensitivity parameter for dendrite snip	D_TH,D	Gy
Sensitivity for neuron death due to dendritic length reduction	DL	Unitless

Note. Other model parameters specifically related to random damage models are described in the discussion of Eqs. (7–9).