Comparison of Multidetector-Row Computed Tomography and Duplex Doppler Ultrasonography in Detecting Atherosclerotic Carotid Plaques Complicated with Intraplaque Hemorrhage

This study compared sensitivity and specificity of multidetector-row computed tomography and duplex Doppler ultrasonography in detecting atherosclerotic carotid plaques complicated with intraplaque hemorrhage. Carotid plaques from 50 patients operated for carotid artery stenosis were analyzed. Carotid endarterectomy was performed within one week of diagnostic evaluation. Results of multidetector-row computed tomography and duplex Doppler ultrasonography diagnostic evaluation were compared with results of histological analysis of the same plaque areas. American Heart Association classification of atherosclerotic plaques was applied for histological classification. Median tissue density of carotid plaques complicated with intraplaque hemorrhage was 14.7 Hounsfield units. Median tissue density of noncalcified segments of uncomplicated plaques was 54.3 Hounsfield units (p=0.00003). The highest tissue density observed for complicated plaques was 31.8 Hounsfield units. Multidetector-row computed tomography detected plaques complicated with hemorrhage with sensitivity of 100% and specificity of 70.4%, with tissue density of 33.8 Hounsfield units as a threshold value. Duplex Doppler ultrasonography plaque analysis based on visual in-line classification showed sensitivity of 21.7% and specificity of 89.6% in detecting plaques complicated with intraplaque hemorrhage. Multidetector-row computed tomography showed a very high level of sensitivity and a moderate level of specificity in detecting atherosclerotic carotid plaques complicated with hemorrhage. Duplex Doppler ultrasonography plaque analysis based on visual in-line classification showed a low level of sensitivity and a moderate-high level of specificity in detecting atherosclerotic carotid plaques complicated with hemorrhage

Art, Technique and Ideology: between Italian and Croatian New Tendencies.

The aim of this essay is to show how, from the 1950s to early 1970s, arts and technologies evolved side by side owing to the new practices borrowed from the legacy of abstract art. Both in Italy and Croatia, several left-wing scholars wrote on the relations between art and technology as an important factor of social progress. On this basis, it was implied that the leftist ideology had a decisive effect on the new artistic attitudes. These took place in Zagreb during the Nove tendencije exhibitions, held in 1961 and 1963 respectively, where several kinetic and so-called "programmed" artworks were displayed. However, just after the 1965 edition of Nove tendencije, Italian artistic research was changed by the Arte Povera movement in 1967. As a consequence, the gap between "programmed" art the Left increased. Although in Italy such changeover caused a complete break in the relationship between art and technology, in Zagreb the last Tendencije exhibitions, held in 1969 and 1973 respectively, combined the computer-based and conceptual art trends with left-wing radicalism