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Objective: The aim of the study was to determine the ef iciency and ef ectiveness of picture archiving and com-munication system (PACS) workstation in detecting enhancement pattern of peripheral bronchogenic carcinoma. Methods:The 62 patients with peripheral bronchogenic carcinoma underwent two-phase contrast material-enhanced multislices com-puted tomography (MSCT) of the chest in a single-breath-hold technique. Two spiral CT scans were obtained at 25 s and 90 s respectively after nonionic contrast material was administrated via the antecubital vein at a rate of 4 mL/s by using an autoinjector. Precontrast and postcontrast attenuation on every scan were measured on PACS and CT workstations respec-tively and peak height was calculated. Enhancement pattern was evaluated on the image obtained at 90 s after injection of contrast medium on PACS and CT workstations respectively. Results: No statistical y significant dif erence in precontrast attenuation, postcontrast attenuation at 25 s and 90 s was found between these measured on a PACS workstation [(40.21 ± 7.03) HU; (55.53 ± 11.09) HU; (75.95 ± 13.45) HU] and those [(39.01 ± 8.95) HU; (56.01 ± 10.91) HU; (76.03 ± 11.95) HU] on a CT workstation (t = 1.140, P = 0.256 > 0.05; t = 1.580, P = 0.149 > 0.05; t = 1.505, P = 0.150﹥0.05). The peak height that calculated on a PACS workstation was 35.74 HU (20 HU). There was not statistical y significant dif erence in peak height between that calculated on a PACS workstation and that on a CT workstation [(37.02 ± 12.05) HU; t = 2.001, P = 0.099 >0.05]. The tumors showed same enhancement pattern on PACS workstation and CT workstation. Of the 62 cases, 38 showed homogeneous enhancement, 17 showed heterogeneous enhancement, five showed peripheral enhancement, two showed central enhancement, at 90 s. The enhancement pattern revealed on PACS workstation was consistent with feature of periph-eral bronchogenic carcinoma. Conclusion: The ef iciency and ef ectiveness of PACS workstation is as same as those of CT workstation in detecting enhancement pattern of peripheral bronchogenic carcinoma.