Radiology
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Comparative Study
Diagnosis of arterial injuries caused by penetrating trauma to the neck: comparison of helical CT angiography and conventional angiography.
To determine the sensitivity and specificity of helical computed tomographic (CT) angiography in the diagnosis of carotid and vertebral arterial injuries caused by penetrating neck trauma. ⋯ The sensitivity and specificity of helical CT angiography are high for detection of major carotid and vertebral arterial injuries resulting from penetrating trauma.
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A gradient-echo three-dimensional magnetic resonance imaging technique (principles of echo shifting with a train of observations, or PRESTO) is presented for use in tracking a bolus of paramagnetic contrast agent through the brain. The approach combines a segmented echo-planar type of acquisition with echo shifting, which leads to echo times that are longer than the repetition time. Unlike echo-planar imaging, the method maintains image resolution despite drastic T2* changes and frequency shifts.
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To investigate in vivo the feasibility of using magnetic resonance (MR) imaging-derived temperature and thermal dose measurements to find the threshold of thermal tissue damage. ⋯ MR imaging thermometry and dosimetry provide an index to predict the threshold for tissue damage in vivo. This index offers improved online control over minimally invasive thermal treatments and should allow for more accurate target volume coagulation.
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Musculoskeletal radiologists, owing to recent advances in imaging technologies and techniques, are playing an increasingly important role in documenting, diagnosing, and treating an increasing variety of bone and soft-tissue lesions. However, improved visualization of anatomic aberrations-"seeing better"-must be paired with "knowing more," on the basis of complete familiarity with all aspects of the biology, physiology, pathophysiology, and static anatomy of the musculoskeletal system. Only with foreknowledge of the latter can the musculoskeletal radiologist fully maximize the benefits of the former.