Final answer:
Magnetic resonance imaging (MRI) is the preferred imaging technique to identify muscle morphology changes associated with Whiplash Associated Disorder (WAD) due to its detailed imaging capabilities for soft tissues.
Step-by-step explanation:
The imaging modality that would most likely pick up on the muscle morphology changes associated with Whiplash Associated Disorder (WAD) is magnetic resonance imaging (MRI). MRI is an important tool in medicine, capable of producing highly detailed two- and three-dimensional images of soft tissues. The process involves subjecting hydrogen nuclei, abundantly found in the water of soft tissues, to fluctuating magnetic fields, which in turn cause them to emit their own magnetic fields. This reaction is captured by sensors within the MRI machine and then interpreted by a computer to create a detailed image of the muscles and their morphology. MRI's sophisticated capabilities make it ideal for detecting the subtle changes in muscle tissue that can occur with WAD.