ArticleJapanese journal of radiology2026
Correlation between intrahepatic iodine quantity after portal vein embolization and future liver remnant hypertrophy.
Article in Japanese journal of radiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis study investigated the correlation between future liver remnant (FLR) hypertrophy and iodine content in the FLR following portal vein embolization, as measured by dual-energy computed tomography (DECT) with direct injection of the contrast agent into the portal vein. MATERIALS AND
methodsIn this prospective study conducted at a single center, 39 patients with biliary tract carcinoma underwent right portal vein embolization prior to extended hepatectomy. After portal vein embolization, DECT was performed after injecting iodinated contrast medium into the portal vein, allowing the quantification of iodine concentration and iodine content in the FLR. Liver volumes were assessed before and after portal vein embolization to calculate the degree of hypertrophy and kinetic growth rate of the FLR. Correlations between iodine content and hypertrophy indices, such as degree of hypertrophy and kinetic growth rate, were analyzed.
resultsPost-portal vein embolization volumetric CT for FLR hypertrophy evaluation was performed at a median of 25 days (21-30 days). Early-phase iodine content of the left hepatic lobe on DECT was significantly correlated with both the degree of hypertrophy (DH; r = 0.380, p = 0.038) and the kinetic growth rate (KGR; r = 0.401, p = 0.028), as determined using Pearson's correlation analysis. Likewise, late-phase iodine content of the left hepatic lobe was significantly correlated with DH (r = 0.403, p = 0.011) and KGR (r = 0.337, p = 0.036).
conclusionsHigher iodine content in the FLR was associated with greater FLR hypertrophy after portal vein embolization. However, because the correlation observed in this study was modest, the predictive ability of this parameter could not be established. Nevertheless, DECT-based iodine quantification may provide complementary information on FLR function and warrants further investigation as a potential biomarker in future studies.
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