Embryology of the Eye Development of the eye originates from neuroectoderm, surface ectoderm, and neural crest cells. The neuroectodermal layer gives rise to the retina, iris, and optic nerve; the surface ectoderm gives rise to the lens; the neural crest…
Allergic-Like Reactions Introduction Contrast media (CM) are an essential aid in diagnostic medical imaging. They are used primarily to enhance the visibility of blood vessels, organs, and pathology in the body. CM are considered pharmacologic agents, and, like any other…
Magnetic resonance imaging (MRI) has proved to be a powerful diagnostic imaging tool in children and adults. MRI uses low-energy nonionizing radio waves, and as such it is particularly well suited for pediatric and longitudinal imaging studies. MRI exploits a…
Diagnostic imaging has evolved from the single technique of radiography discussed in the first edition of Caffey's Pediatric X-Ray Diagnosis in 1945 to a specialty with many modalities and techniques. Many of these modalities use ionizing radiation, and some, such…