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Fig. 2 | Insights into Imaging

Fig. 2

From: A prediction nomogram for suboptimal debulking surgery in patients with serous ovarian carcinoma based on MRI T1 dual-echo imaging and diffusion-weighted imaging

Fig. 2

Image features of the MRI variables. ad Four grades of relationship between the sigmoid colon/rectum and ovarian mass. a Axial MR T1 dual-echo (MR-T1-DE) image shows grade 0 (clear). A hook edge sign existed (white arrowheads) between the sigmoid colon (red triangle) and ovarian mass (white star). b Axial MR-T1-DE image shows grade 1 (close). The hook edge disappeared, but the shape of the sigmoid colon (red triangle) and ovarian mass (white star) can be vaguely distinguished (white arrowheads). c Axial MR-T1-DE image shows grade 2 (bridge sign). The hook edge disappeared, and the rectum (red triangle) and ovarian mass (white star) were limited adhered (white arrowheads). d Axial MR-T1-DE image shows grade 3 (fusion). The hook edge disappeared, and the sigmoid colon (red triangle) and ovarian mass (white star) fused into a block (white arrowheads). e, f Diaphragmatic metastasis. e Diffusion-weighted image shows hyperintense nodules implanted under the diaphragm (white arrowheads). f DW image shows extensive thickening of the diaphragm with hyperintensity (white arrowheads). g Metastases of liver and omentum. DW image shows hyperintense nodules of liver (white arrowhead) and omentum (red arrowheads). h Retroperitoneal lymphadenopathy. DW image shows significant hyperintensity of retroperitoneal enlarged lymph nodes (white arrowheads)

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