A layer of additional soft tissue may be placed around the torso. The extra dimensions that are added to the semi axes of the elliptical cross section of the torso specify the amount of additional tissue.
The Extra Torso Fat
window is used to specify
the extra dimensions. The window shows the outline of the original
(before extra tissue is added) and the outer surface with the
additional layer. The window is invoked by selecting Extra Torso
Fat … under Organs
on the main menu or by clicking with the
right mouse button on Extra Torso Fat
in the organ panel.
In the Figure, the original semimajor axis is 19.36 cm (the width of the torso is twice that, or 38.72 cm) and the semiminor axis, from front to back, is 9.95 cm. The fattened torso will have a semimajor axis of 20.46 and a semiminor axis of 12.95 cm.
All internal organs, the male genitalia, and the pregnant uterus remain in their original positions, unaffected by the fat layer. The breasts are moved outwards and apart, retaining their original shape. The breast volume written to the MCNP file is the nonfat value; the actual volume changes slightly due to the different curvature of the extended torso. The skin adjusts to remain on the outside of the model.
The Extra Torso Fat
checkbox on the organ panel must be checked
for the extra thicknesses to be used and to enable changing the
values in the Extra Torso Fat Window.
Values for the extra thickness may be typed into the Extra fields; a carriage return (<CR>) is required for the values to take effect. The arrow keys adjust the extra thickness in 0.1 cm increments. The up and down arrow keys change the front to back thickness; the left and right arrow keys change the left to right width. The additional profile may be changed interactively by holding down the left mouse button and dragging the desired shape.
Negative values for the extra thicknesses are not permitted. The total weight is updated as the values are being changed.
Last modified: September, 2004
Kenneth A. Van Riper / email