Use of power Doppler in pediatric neurosonography: a pictorial essay
Autor: | K Cox, T Vanderzalm, T N Hronas, R Mocharla, B Lidzy, K L Knight, D Kinder, Joanna J. Seibert, R Avva |
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Rok vydání: | 1998 |
Předmět: |
Male
medicine.medical_specialty Adolescent Ultrasonography Doppler Transcranial Sensitivity and Specificity Diagnosis Differential Power doppler Neonatal brain Humans Medicine Radiology Nuclear Medicine and imaging Ultrasonography Doppler Color Cerebral perfusion pressure Child Brain Diseases business.industry Infant Newborn Brain Infant Color doppler ultrasound Color doppler medicine.disease Intraventricular hemorrhage Child Preschool cardiovascular system Female Radiology business Blood Flow Velocity circulatory and respiratory physiology |
Zdroj: | RadioGraphics. 18:879-890 |
ISSN: | 1527-1323 0271-5333 |
Popis: | In pediatric neurosonography, conventional color Doppler imaging has been the primary adjunct to routine gray-scale imaging. Power Doppler sonography is a relatively recent development that does not have the limitations of conventional color Doppler ultrasound. The power Doppler technique measures the energy of moving red blood cells instead of the velocity and direction of flow. Advantages of this technique include increased sensitivity for identifying flow in slow-flow states, more complete evaluation of a vessel, and more accurate evaluation of the course of the vessel. Power Doppler sonography is helpful in evaluation of the neonatal brain in a variety of clinical situations: identifying the exact locations of extraaxial fluid collections, differentiating intraventricular clot from normal choroid plexus, detecting intraventricular hemorrhage, and demonstrating asymmetries in cerebral perfusion. However, in certain difficult cases, use of both conventional color Doppler sonography and power Doppler sonography produces increased diagnostic accuracy because these techniques furnish complementary information. |
Databáze: | OpenAIRE |
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