To compare the diagnostic performance of a high-resolution picture archiving and communications system(PACS) workstation directly interfaced with computed tomography(CT) with hard-copy printouts and to compare the detection rate according to slice thickness in hepatocellular carcinomas(HCCs).

Forty-six patients with 118HCCs underwent two-phase multi-detector row helical CT imaging of the entire liver after contrast administration. Late arterial phase images were obtained serially during a single breast-hold, and portal venous-phase images were then obtained. In soft-copy, images taken in each phase were reconstructed by 3mm and 7mm in thickness. Soft-copy readouts on a workstation in PACS and hard-copy printouts were independently compared for the presence of HCC by two radiologists unaware of the possible presence of tumors, and for each phase the detection rate was determined in 7mm thickness. The detection rate of HCC displayed on a workstation was analyzed in 3mm and 7mm thickness for each phase.

No significant differences in observer performance were observed between laserprinted hard copies and CT images displayed on a workstation(p>0.05). But the detection rate of HCC displayed on workstation was higher in 3mm thickness(p<0.05).

The diagnostic performance of CT hard copies is acceptable and comparable to a high-resolution PACS workstation in hepatocellular carcinomas and the detection rate of HCC on PACS workstation is significantly higher in thin slice thickness.

This study was to evaluate the effectiveness of the government-funded subsidized occupational health program for small-scale enterprises(GSOHP_SSE) by occupational health communication in workplace.

We sampled the 1,835 enterprises of study by proportional stratified random sampling among industries of supported and not supported by GSOHP_SSE in Seoul, Ansan, Daejeon, Kwangjoo and Pohang. Information on the general characteristics of enterprises and respondants and occupational health communication in the workplace was collected on self-reported questionnaires by post-survey between December 6 and 15 in 2001. We received answers from 463 enterprises and analyzed 228 enterprises through data-cleaning by logistic regression to evaluate effectiveness of GSOHP-SSE about occupational health communication in the workplace.

By multiple logistic regression analysis, GSOHP_SSE turned out not to be statistically significant factor in all dependent variables about occupational health communication in the workplace. The concern of owner(odds ratio (below OR) ; 1.63, 95% confidence interval(below 95% CI) ; 0.38-7.01), formation(OR ; 3.67, 95% CI ; 1.00-13.44) and empowerment(OR ; 1.48, 95% CI ; 0.25-8.91) of health manager, request about occupational health problem of health manager(OR ;4.48, 95% CI ; 0.97-20.57) and occupational health communication of owner (OR ; 3.07, 95% CI ; 0.81-11.71) had the trend increasing OR in the industries supported GSOHP_SSE relative to the industries not supported. But in recognition of possibility on occupational health communication of laborers, OR of GSOHP_SSE was decreased in 0.53(95% CI ; 0.11-2.44).

This study found that the GSOHP_SSE was some effective to the side of employer and health manager, but had a limitation about change of communication culture useful to the laborers. We suggested the laborer-centered health training programs or the empowerment-based health training programs for effective occupational health management in the workplace.