Magnetic resonance imaging clinics of North America
-
Magn Reson Imaging Clin N Am · Nov 2011
MR imaging of the term and preterm neonate with diffuse brain injury.
Both term and preterm neonates suffer from diffuse brain injury. Global hypoxic-ischemic injury (HII) describes the diffuse brain injury most common in term neonates. HII is thought to result from decreases in blood flow and oxygen supply. ⋯ The cause is likely multifactorial. Magnetic resonance (MR) imaging is the most sensitive imaging technique for early diagnosis of brain injury in neonates. This article discusses neonatal diffuse brain injury, the role of MR imaging in predicting neurodevelopmental outcome, and research results using MR imaging techniques.
-
Experience in magnetic resonance (MR) imaging of the neonatal musculoskeletal system is rapidly increasing. The exquisite ability of MR to image the soft tissues, especially cartilage, without radiation is its key strength. Although it is not practical or sensible to undertake MR imaging in conditions in which radiography and ultrasound provide adequate information, MR is proving to be a useful adjunct and problem-solving tool in many neonatal musculoskeletal conditions.
-
Magn Reson Imaging Clin N Am · Aug 2011
ReviewSkull base, orbits, temporal bone, and cranial nerves: anatomy on MR imaging.
Accurate delineation, diagnosis, and treatment planning of skull base lesions require knowledge of the complex anatomy of the skull base. Because the skull base cannot be directly evaluated, imaging is critical for the diagnosis and management of skull base diseases. ⋯ Thus, CT and MR imaging are often used together for evaluating skull base lesions. This article focuses on the radiologic anatomy of the skull base pertinent to MR imaging evaluation.
-
Over the past few decades, spinal magnetic resonance imaging (MR imaging) has largely replaced computed tomography (CT) and CT myelography in the assessment of intraspinal pathology at institutions where MR imaging is available. Given its high contrast resolution, MR imaging allows the differentiation of the several adjacent structures comprising the spine. This article illustrates normal spinal anatomy as defined by MR imaging, describes commonly used spinal MR imaging protocols, and discusses associated common artifacts.
-
Magn Reson Imaging Clin N Am · Feb 2011
ReviewBasic concepts of MR imaging, diffusion MR imaging, and diffusion tensor imaging.
MR image contrast is based on intrinsic tissue properties and specific pulse sequences and parameter adjustments. A growing number of MRI imaging applications are based on diffusion properties of water. To better understand MRI diffusion-weighted imaging, a brief overview of MR physics is presented in this article followed by physics of the evolving techniques of diffusion MR imaging and diffusion tensor imaging.