By Michael Hofbeck, Karl-Heinz Deeg, Thomas Rupprecht
This booklet covers the entire diversity of present functions of Doppler sonography in infancy and youth, describing the diversity of power findings as a result of a wealth of pictures. After an introductory bankruptcy at the actual and technical foundation of Doppler sonography, purposes of cerebral Doppler sonography in infancy and of transcranial Doppler sonography in adolescence are addressed, with quite a few examples of imaging appearances. the foremost a part of the publication is dedicated to Doppler sonography of the mind, face and neck and of the stomach, protecting basic belly vessels, liver, spleen, pancreas, and mesenteric and renal move. Imaging of the ovaries and testes can be provided, encompassing the differential prognosis of acute scrotum and different space-occupying lesions of the testis. The booklet closes by way of contemplating Doppler sonography of soppy tissue and vascular malformations, and the effect of congenital center malformations on circulation parameters in peripheral arteries. Doppler Sonography in Infancy and formative years might be a useful reference for pediatricians, neonatologists, pediatric sonographers, and pediatric and basic radiologists.
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Extra info for Doppler Sonography in Infancy and Childhood
3 (a) Illustration of flow measurement of the flow in the internal carotid artery (sagittal section) (Drawing by Blankvisual, Thun, Switzerland). (b, c) Colour Doppler of the internal carotid artery (parasagittal section). The image shows the complex course of the internal carotid artery with the petrosal, cavernosal and cerebral part. (d, e) Expanded image of the base of the skull shows the internal carotid artery with colour Doppler (d) and power Doppler (d). 1 petrosal part, 2 cavernosal part, 3 cerebral part.
One disadvantage at the present time is still the somewhat limited depth of penetration in comparison to the conventional colour Doppler. With technical progress, however, these limitations may be overcome in the foreseeable future so that B-flow in combination with the CW/PW spectral Doppler may completely replace the triplex process usually used today. Baker DW (1969) Pulsed ultrasonic blood flow sensing. IEEE Trans Sonics Ultrason 17:170–185 Bommer WJ, Miller L (1982) Realtime two-dimensional colorflow Doppler: enhanced Doppler flow imaging in the diagnosis of cardiovascular disease.
This would involve moving a single piezoelectric crystal mechanically or having to consult an array ultrasonic probe. 7 Colour-Coded Doppler Sonography 21 Fig. 20 Insertion of the angle cursor to calculate the cos alpha selective information about all the flows occurring in a large area. However, since all the flow information would be present in isolated form, many hundred display or registration channels would be needed. On the one hand, such huge technical elaboration is out of question, but on the other hand, two-dimensional Doppler would expand diagnostic possibilities.