Development of whole-body voxel human models

Child voxel models

The development of radio wave technologies in recent years has led to their increasing use in a growing range of applications. Dosimetry of children's exposure to radio frequency radiation emitted from these devices has become an important research challenge in this field. However, for a variety of reasons, it has proved difficult to develop a child model with a similar level of quality as the adult whole-body voxel human models with internal structures.

To overcome this problem, NICT has developed a method of creating a whole-body child voxel model that precisely reconstructs a child's average body, by three-dimensionally modifying the adult model. This modification method makes it possible to effectively develop not only the child models but also other human models, such as pregnant women.

Modification of the adult models

The proportion of various parts of the body vis-à-vis height differs significantly between adults and children.

NICT therefore took measurements of various parts (66 parts) of the bodies of children aged around 3, 5, and 7, and, based on these measurement values, modified the adult male voxel model, Taro, to match the measurement values corresponding to those of 3-, 5-, and 7-year-olds.

The adult male voxel model Taro was modified to create a child's physique by using a Free-form Deformation algorithm.

Whole-body voxel human models with a child's physique