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European Radiology Experimental
Fig. 6 | European Radiology Experimental

Fig. 6

From: Breast cancer: comparison of quantitative dual-layer spectral CT and axillary ultrasonography for preoperative diagnosis of metastatic axillary lymph nodes

Fig. 6

Arterial phase dual-layer spectral CT (DLSCT) examination of a woman with left-sided breast cancer and a lymph node in the left axilla. The lymph node does not show increased conventional CT HU (a), Δ contrast enhancement (c) (conventional CT (HU) (a) minus virtual non-contrast (HU) (b)), iodine density (e), or spectral slope ((mono-energy 40 keV (f) minus mono-energy 100 keV (g))/60 keV). However, Z effective (d) is decreased. Based on the cut-off values, both Δ contrast enhancement and conventional CT HU diagnosed the lymph node as non-metastatic. Axillary ultrasonography (h) described the lymph node as suspicious, and fine-needle aspiration contained malignant tumour cells. Sentinel lymph node biopsy contained malignant tumour cells from invasive ductal carcinoma

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