Diseases once believed to be confined to the tropics, such as parasitic, mycobacterial, fungal, bacterial, and viral infections are still a major cause of mortality and moribidity in the tropics, yet can affect the developed world in an era of increased global travel and migration. Neuroimaging technique developments over the last several decades have helped clinicians better understand and diagnose these conditions. Experts from tropical countries share their experiences regarding tropical disorders, some of which are rare in the western world, but possible to appear in patients and not readily recognized by specialists not familiar with these diseases. Topics in this issue include: Relevance of neuroimaging in the diagnosis and management of tropical neurologic disorders; Pathology of Tropical Diseases; Viral Infections of the Central Nervous System; Central Nervous System Tuberculosis; Parasitic diseases of nervous system; Neuroimaging in Post-infectious Demyelination and Nutritional Disorders of the Central Nervous System; CNS Fungal Infections in the Tropics; Neuroimaging Epilepsy in the Tropics; Neuroimaging in Cranio-Vertebral Anomalies as seen in Tropics; Vascular Brain Pathologies; Neurobrucellosis; Hirayama Disease; Transverse Myelitis; and Pyomyositis.

CT, contrast CT, MRI, functional MRI, SPECT, CTA, and x-ray as tools to identify pathogens and diagnose intracranial infections are presented. Topics include: Epidemiology of Central Nervous System Infections; Imaging of Cranial Meningitis and Ventriculitis; Encephalitis, Cerebritis and Brain Abscess; Imaging of Central Nervous System Tuberculosis; Imaging of Rickettsial, Spirochetal, and Parasitic Infections; Imaging of Neurocysticercosis; Fungal Infections of the Central Nervous System; Central Nervous System Infections in the Pediatric Population; Imaging of Infectious Diseases of Spine; Neuropathological Findings in Intracranial Infections; Neurosurgical Approach to Infectious Disease of the Brain; Head and Neck Infections.

With each passing year neuroimaging becomes more and more central in the diagnosis of neurologic disease, as its capacity to detect subtle changes in nervous system tissue increases. This issue of Neurologic Clinics features twelve articles that address the key clinical applications of the several radiologic modalities. Topics include: Neuro-Imaging of Infectious Disease; Neuro-Imaging of Dementia; Imaging of Traumatic Brain Injury; 3. MR Guided Focused Ultrasound: A New Technology for Clinical Neurosciences; Novel Multi- Modality Imaging Techniques for the Diagnosis and Evaluation of Arteriovenous Malformations; Neuroimaging in the Critical Care Environment; Imaging of Cerebral Ischemia: From Acute Stroke to Chronic Disorders; Imaging of Cancer-Related Neurotoxicity; Neurocutaneous Syndromes; Imaging of Chiari Malformation and Hydrocephalus; and others.

In this issue of Neuroimaging Clinics, guest editors Drs. Mahmud Mossa-Basha, Carlos Zamora, and Mauricio Castillo bring their considerable expertise to the topic of Vasculitis. Both conventional and advanced imaging play a central role in the diagnosis of vasculitides, and in this issue, top experts in the field discuss classification, guidelines, diagnosis, pathology, and imaging of every major type of vasculitis. Contains 14 relevant, practice-oriented topics including classification and guidelines for diagnosis of vasculitis; clinical diagnosis, manifestations and treatment of infectious and post-infectious vasculopathies; usefulness of different imaging methods in the diagnosis of cerebral vasculopathy; imaging of vasculitis associated with systemic disease (RA, lupus, sarcoid); and more. Provides in-depth clinical reviews on vasculitis, offering actionable insights for clinical practice. Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.

Most central nervous system diseases that lead to severe neurologic dysfunction or death are caused by viruses and abnormally configured proteins called prions. This new issue of Neuroimaging Clinics, Guest Edited by Turgut Tali, explores the imaging used to detect these diseases. Articles cover topics on Neuropathology of Virus Infections of the CNS, Imaging of "slow viruses" Infections of the CNS, Imaging of Post-infectious Encephalomyelitis, and Imaging of HSV Infections of the CNS.

An especially important issue during these uncertain times, this collection of articles examines Neuroimaging from an economic perspective, with articles that discuss leadership, “turf battles , strategic planning in the face of declining reimbursement, and the impact of teleradiology and telemedicine in cutting costs and improving access. Medicolegal issues are addressed, as is evidence-based medicine and effective utilization. Performance measures and conflict of interest are reviewed, among many other topics.

In this issue of Neuroimaging Clinics, guest editors Drs. Mahmud Mossa-Basha, Carlos Zamora, and Mauricio Castillo bring their considerable expertise to the topic of Vasculitis. Both conventional and advanced imaging play a central role in the diagnosis of vasculitides, and in this issue, top experts in the field discuss classification, guidelines, diagnosis, pathology, and imaging of every major type of vasculitis. Contains 14 relevant, practice-oriented topics including classification and guidelines for diagnosis of vasculitis; clinical diagnosis, manifestations and treatment of infectious and post-infectious vasculopathies; usefulness of different imaging methods in the diagnosis of cerebral vasculopathy; imaging of vasculitis associated with systemic disease (RA, lupus, sarcoid); and more. Provides in-depth clinical reviews on vasculitis, offering actionable insights for clinical practice. Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.