3/15/2023 0 Comments Ecografia con contraste![]() Anatomic validation of the aortic origin of these echoes was obtained by means of ultrasonic contrast injections made during radiologic studies of the aortic root. Further support was gained by recording abnormally intense and distorted signals in patients with calcific aortic stenosis. Lesser echoes originating between the undulating margins of the aortic root were identified as arising from the valve cusps by correlating their motion with the production of the cardiac sounds. The movement pattern is identical to the mitral annulus, which also represents a portion of the fibrous skeleton of the heart. Their position is central in relation to echoes arising from the mitral and tricuspid valves, corresponding to the anatomic position of the aortic root. These signals move anteriorly during systole and posteriorly during diastole. The characteristic echo pattern of the aortic root consists of paired undulating signals three to five cm apart. The echo pattern of the aortic root is elicited by locating the typical echo of the mitral valve and then angulating the transducer medially and sometimes cephalically. The online version of this article (doi:10.1007/s1324-1) contains supplementary material, which is available to authorized users. Current CEUS applications in CD are: CD activity assessment, evaluation of inflammatory masses, distinguishing phlegmons from abscesses, characterization of stenosis by differentiating fibrosis from inflammation, monitoring the efficacy of drug treatments and improving the detection of disease recurrence.ĬEUS is an emerging technique that is part of the entire sonographic evaluation, with a role in the diagnosis and follow-up of CD, thus improving therapy planning and monitoring of the efficacy of treatment. The article reviews the technique, sonographic findings, advantages and limitations, and clinical applications of contrast-enhanced US in the evaluation of Cohn’s disease. The introduction of imaging quantification techniques enables an objective quantitative measurement of the enhancement. Contrast-enhanced ultrasound (CEUS) is a new technique that involves IV administration of an ultrasound contrast agent with real-time examination, providing an accurate depiction of the bowel wall microvascularization and the perienteric tissues. Doppler techniques are tools that visualize and quantify bowel vascularization. B-Mode US can evaluate the localization and length of the affected intestinal segments and allow identification of transmural complications, stenosis and intestinal obstruction. High-resolution bowel ultrasound has emerged as an alternative imaging technique for the diagnosis and follow-up of patients with CD, being as accurate as CT and MR for detecting intramural and extramural extension of the disease. Recent meta-analysis has demonstrated no significant differences in diagnostic accuracy among different imaging techniques (US, MRI and CT) in the evaluation of Crohn’s disease (CD).
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