Abstract
The purpose of the study was to perform a node-by-node comparison of an ADC-based diagnosis and various size-based criteria on T2-weighted imaging (T2WI) with regard to their correlation with PET/CT findings in patients with uterine cervical cancer. In 163 patients with 339 pelvic lymph nodes (LNs) with short-axis diameter >5 mm, the minimum apparent diffusion coefficient (ADC), mean ADC, short- and long-axis diameters, and ratio of long- to short-axis diameters (L/S ratio) were compared in PET/CT-positive and -negative LNs. On PET/CT, 118 (35%) LNs in 58 patients were positive. The mean value of minimum and mean ADCs, short- and long-axis diameters, and L/S ratio were different in PET/CT-positive (0.6436 × 10−3 mm2/s, 0.756 × 10−3 mm2/s, 10.3 mm, 13.2 mm, 1.32, respectively) and PET/CT-negative LNs (0.8893 × 10−3 mm2/s, 1.019 × 10−3 mm2/s, 7.4 mm, 11.0 mm, 1.49, respectively) (P < 0.05). The Az value of the minimum ADC (0.864) was greater than those of mean ADC (0.836), short-axis diameter (0.764), long-axis diameter (0.640) and L/S ratio (0.652) (P < 0.05). The sensitivity and accuracy of the minimum ADC (86%, 82%) were greater than those of the short-axis diameter (55%, 74%), long-axis diameter (73%, 58%) and L/S ratio (52%, 66%) (P < 0.05). ADC showed superior correlation with PET/CT compared with conventional size-based criteria on T2WI.
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Acknowledgements
This work was supported by the Korea Research Foundation Grant funded by a grant of the Korea Healthcare Technology R&D Project, Ministry of Health Welfare, Republic of Korea (A070001) and by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korean government (MOST) (no. R01-2006-000-10998-0)
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Choi, E.K., Kim, J.K., Choi, H.J. et al. Node-by-node correlation between MR and PET/CT in patients with uterine cervical cancer: diffusion-weighted imaging versus size-based criteria on T2WI. Eur Radiol 19, 2024–2032 (2009). https://doi.org/10.1007/s00330-009-1350-5
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DOI: https://doi.org/10.1007/s00330-009-1350-5