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승인돈 대한영상의학회 1986 대한영상의학회지 Vol.22 No.5
Sonographic measurements often give considerable diagnostic significance. However, large discrepancy between the real anatomic sizes and sonographic measurements could cause an incorrect diagnosis. Authors carried out a series of experiment using a phantom and two scanners and the results are as follows : 1. There is a little difference in errors between two scanners, and the measurement does not almost always correspond to the real distance. 2. The rates of errors of the measurements are almost fixed regardless of the positions of the reflectors. 3. There is no relationship between the transducer MHz and error rate. 4. As the error is derived from the scanner electronics it isnecessary to calibrate the scanner periodically, and if not calibrated one should consider the error rate of the scanner inthe anatomical measurement .
승인돈 대한영상의학회 1986 대한영상의학회지 Vol.22 No.4
An incidentally detected transposition of the inferior vena cava in patient with gall bladder carcinoma is reported with discussion of findings of CT scan and review of anomalies of the inferior vena cava. Since anomalous vena cava may simulate any other abnormality such as metastatic disease, it is very important to know anomaly of the vena cava with understanding of its embryological background.