Imaging Principles in Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is based on spatially encoding a nuclear magnetic resonance (NMR) signal. Therefore an understanding of the basics of NMR is critical for understanding MRI, and this…
Cerebral Aneurysms and Cerebrovascular Malformations
Cerebral Aneurysms Incidence and Natural History The incidence of a cerebral aneurysm in the general population is 0.5% to 5%. Women more commonly harbor a cerebral aneurysm than men, and…
Imaging Principles in Magnetic Resonance Angiography
Introduction Magnetic resonance angiography (MRA) enables noninvasive assessment of vascular disease in both the arterial and venous circulation. Owing to the availability of volumetric data sets without the need for…
Magnetic Resonance Imaging in the Pediatric Patient
Introduction The demand for pediatric magnetic resonance imaging (MRI) is steadily increasing because MRI is radiation free, has exquisite soft tissue contrast, and provides quantitative structural, functional, and vascular information…
Spinal Tumors
Introduction Spinal neoplasms are divided into three groups based on their anatomic locations: extradural, extramedullary-intradural, and intramedullary tumors ( Fig. 30-1 ). Extradural tumors include masses in the bones, disks,…
Cervical Adenopathy and Neck Masses
Classification Cancer of the head and neck, which includes cancers of the larynx, nasal passages and nose, oral cavity, pharynx, salivary glands, buccal regions, and thyroid, is the sixth most…
Intracranial Neoplasms
Introduction Based on data collected from several central cancer registries during the years 2007-2011, the Central Brain Tumor Registry of the United States (CBTRUS) estimates that 67,900 new cases of…
Computed Tomography Imaging Operation
Protocol Management and Optimization Protocols are the turn-by-turn instructions that allow the computed tomography (CT) operator to get from point A—registering the patient on the scanner from the order in…
Imaging of the Head and Neck in the Pediatric Patient
Introduction The old adage that “children are not young adults” is certainly true when evaluating pediatric head and neck lesions. The differential diagnosis of neck masses differs compared to masses…
