This book describes the latest modalities such as tau PET imaging for diagnosis of Alzheimer's disease and other dementias, and also provides information on handling and analyzing imaging data that is not found in other books. In addition, it introduces routine imaging studies in the management of dementia in Japan. The prevalence of dementia has increased over the past few decades, either because of greater awareness and more accurate diagnosis, or because increased longevity has created a larger population of the elderly, the age group most commonly affected. Although only clinical assessment can lead to a diagnosis of dementia, neuroimaging in dementia is recommended by most clinical guidelines, and its adjunct role has traditionally been to exclude a mass lesion rather than to support a specific diagnosis. Neuroimaging may be also helpful for developing new strategies to achieve diagnoses as early as possible for therapies aimed at slowing the progression of neurodegenerative diseases manifesting dementia. Under these conditions, all clinicians and researchers who are involved in neuroimaging for dementia should decide which patients to scan, when imaging patients is most useful, which modality to use, how to handle imaging data from many institutions, and which analytical tool to use. This edition comprises contributions from leading Japanese experts in their fields.