The change of the low density area on postoperative CT in the resecting margin of the liver after hepatectomy using Microwave Tissue Coagulator.-a preliminary report

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We evaluated the change of the resecting margin in the liver after hepatectomy using Microwave Tissue Coagulator by. Computed Tomography (CT). CT scan revealed sharply demarcated low density area along with the resecting margin in the liver. The "volume" of the low densiy area was calculated by multiplying the low density area by the width of the slice of CT scan and adding them in all slice. In this study the following results were found; 1) The "low density volume" decreased postoperatively and the "volume" at D1 postoperative day was estimated to reduce by half at 4.5×D1 postoperative day. 2) As for the relationship between the "low density volume (V)" at 1 month after operation and the size of resected specimen, there was a correlation V=7.54R+29.2 (cm3)(coefficient of correlation 0.92, P<0.05), when R was the mean of the long and short diameter of the oval shaped resecting line which we mapped out on the surface of the liver. The result of this study may be useful to estimate the damaged volume near the resecting margin in the liver using Microwave Tissue Coagulator.
特定非営利活動法人 Microwave Surgery研究会の論文