In March 2009, Dr. Halweg joined the Amen Clinic to study functional brain imaging and the clinical application of Single Photon Emission Computed Tomography (SPECT scans). This can be an important tool for assessing damage to the cortex from traumatic brain injuries or exposure to drugs and toxins, or imaging the development of dementia and other neuro-degenerative disorders. He brings the knowledge and experience of nearly a decade of research using this diagnostic modality for patient recovery of brain disorders.