The subject of nondestructive evaluation of wood properties has its origin in the necessity to solve practical problems. This book comprehensively reviews numerous aspects of imaging and nondestructive characterization of wood products ranging from trees to the most complex wood-based composite. The text is of particular interest to those who are concerned with the study of wood as an engineering material for fundamental research or practical application. It presents the imaging of the internal structure of wood with methods based on the propagation of electromagnetic waves, elastic waves and heat, and imaging with nuclear particle radiation based methods.