Potential of MR histogram analyses for prediction of response to chemotherapy in patients with colorectal hepatic metastases

• Published in: European radiology 2016-07, Vol.26 (7), p.2009-2018
• Main Authors: Liang, He-Yue, Huang, Ya-Qin, Yang, Zhao-Xia, Ying-Ding, Zeng, Meng-Su, Rao, Sheng-Xiang
• Format: Article
• Language: English
• Subjects: Adult; Aged; Antineoplastic Agents - therapeutic use; Area Under Curve; Chemotherapy; Colorectal Neoplasms - pathology; Diagnostic Radiology; Diffusion Magnetic Resonance Imaging - methods; Female; Humans; Imaging; Internal Medicine; Interventional Radiology; Liver; Liver Neoplasms - diagnostic imaging; Liver Neoplasms - drug therapy; Liver Neoplasms - secondary; Magnetic Resonance; Magnetic Resonance Imaging; Male; Medical prognosis; Medicine; Medicine & Public Health; Metastasis; Middle Aged; Neuroradiology; Predictive Value of Tests; Radiology; Reference Values; Retrospective Studies; Sensitivity and Specificity; Tomography; Tumors; Ultrasound
• ISSN: 0938-7994; 1432-1084
• DOI: 10.1007/s00330-015-4043-2

Purpose To determine if magnetic resonance imaging (MRI) histogram analyses can help predict response to chemotherapy in patients with colorectal hepatic metastases by using response evaluation criteria in solid tumours (RECIST1.1) as the reference standard. Materials and methods Standard MRI including diffusion-weighted imaging (b=0, 500 s/mm 2 ) was performed before chemotherapy in 53 patients with colorectal hepatic metastases. Histograms were performed for apparent diffusion coefficient (ADC) maps, arterial, and portal venous phase images; thereafter, mean, percentiles (1st, 10th, 50th, 90th, 99th), skewness, kurtosis, and variance were generated. Quantitative histogram parameters were compared between responders (partial and complete response, n=15) and non-responders (progressive and stable disease, n=38). Receiver operator characteristics (ROC) analyses were further analyzed for the significant parameters. Results The mean, 1st percentile, 10th percentile, 50th percentile, 90th percentile, 99th percentile of the ADC maps were significantly lower in responding group than that in non-responding group ( p =0.000–0.002) with area under the ROC curve (AUCs) of 0.76–0.82. The histogram parameters of arterial and portal venous phase showed no significant difference ( p >0.05) between the two groups. Conclusion Histogram-derived parameters for ADC maps seem to be a promising tool for predicting response to chemotherapy in patients with colorectal hepatic metastases. Key Points • ADC histogram analyses can potentially predict chemotherapy response in colorectal liver metastases. • Lower histogram-derived parameters (mean, percentiles) for ADC tend to have good response. • MR enhancement histogram analyses are not reliable to predict response.