Vojko Flis (Author), Erih Tetičkovič (Author)

Abstract

Izhodišča. Razčlenitev ultrazvočne zgradbe aterosklerotične lehe pri stenozi notranje karotide ima lahko pomembne posledice za odločitev o kirurškem posegu na tej arteriji. Pričujoča raziskava primerja zmožnost razločevanja trirazsežnega ultrazvočnega pregleda (3D UZ) med ultrazvočno zgradbo asimptomatske in simptomatske lehe pri stenozi, ki je večja od 70%. Bolniki in metode. Pregledanih je bilo 86 bolnikov s stenozo notranje karotidne arterije, večjo od 70% (70-99%, 45 simptomatskih, 41 asimptomatskih). 3D UZ slika je bila digitalizirana in uravnotežena (GSM) v sivih svetlobnih tonih med črnino in belino (0 = kri, 200 = adventicija žile). Mediana vrednost sivine (GSM) za leho je bila izračunana iz volumskega razmerja ehogenimi in eholucentnimi področji. Heterogenost lehe je bila izračunana iz gostote ehogenih področij na volumensko enoto lehe. Rezultati. GSM volumsko razmerje eholucentnosti je bilo višje pri asimptomatskih lehah (0,6 - IZ 0,48-0,91 proti 0,3 - IZ 0,21-0,75:p=0,002). GSM heterogenost je bila višja pri simptomatskih lehah (6,8 - IZ 2,5-18,3 proti 0,41 - IZ 0,2-3,4:p=0,0001). Zaključki. Prostorski pregled celotne aterosklerotične lehe, ki ga omogoča preiskava s 3D UZ, omogoča objektivno analizo ultrazvočne strukture aterosklerotične lehe in je pri razlikovanju med simptomatsko in asimptomatsko leho bolj natančna metoda kot analiza posameznih UZ presekov, dobljenih z dvorazsežno UZ preiskavo.

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Data

Language: Slovenian
Year of publishing:
Typology: 1.08 - Published Scientific Conference Contribution
Organization: UM - University of Maribor
UDC: 616.1
COBISS: 1329727 Link will open in a new window
ISSN: 1318-0347
Views: 1351
Downloads: 23
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Secondary language: Unknown
Secondary title: Three-dimensional ultrasound and stenosis of internal carotid artery
Secondary abstract: Background. Eludication of the ultrasound structure of the atherosclerotic plaque in stenosis of internal carotid artery may have important implications for carotid surgery. This study compares the ability of computer derived 3D ultrasound gray scale volumetric measurements to diferentiate between ultrasonic structure of symptomatic and asymptomatic carotid plaque causing more than 70% stenosis. Methods. Eightysix internal carotid artery stenoses (70-99%, 45 symptomatic, 41 asymptomatic) were imaged with 3D ultrasound to obtain the whole volume of the atherosclerotic plaque. Digitalized sonograms were computerized and normalized to the gray scale median (GSM) of blood (0) and vessel adventitia (200). Plaque GSM was obtained for the whole volume by computing the volume ratio between acholucent and echogenic areas. The plaque heterogeneity was obtained by computing the density of echogenic areas per volume unit. Parametric t test was used for statistic analysis. Results. Minimum volume GSM ratio (determining echolucency) was higher for asymptomatic plaque (0.6 - CI 0.48-0.91 versus 0.3 - CI 0.21-0.75:p=0.002). Greater GSM heterogeneity was present in symptomatic plaque (6.8 - CI 2.5-18.3 versus 0.41 - CI 0.2-3.4: p=0.0001). Conclusions. Volume ultrasound imaging that enables objective assessment of whole ultrasonic plaque structure is more sensitive that single longitudinal view sonography for differentiating between ultrasonic structure of symptomatic and asymptomatic plaque.
Secondary keywords: Imaging, three-dimensional;Slikanje, tridimenzionalno;Ultrasound;Ultrazvok;Carotid stenosis;Stenoza karotide;
URN: URN:NBN:SI
Type (COBISS): Not categorized
Pages: Str. III-39 - III-42
ID: 9105426