Dan Wang1, Ming-Liang Wang1, Yue-Hua Li2. 1. Institute of Diagnostic and Interventional Radiology, The Sixth Affiliated People's Hospital, Shanghai Jiao Tong University, 600 Yi Shan Road, Shanghai 200233, China. 2. Institute of Diagnostic and Interventional Radiology, The Sixth Affiliated People's Hospital, Shanghai Jiao Tong University, 600 Yi Shan Road, Shanghai 200233, China. Electronic address: liyuehua312@163.com.
Abstract
PURPOSE: To use Ktrans to evaluate the aggressiveness and vascular permeability of peritumoral edema in cases of lung cancer brain metastases. MATERIALS AND METHODS: A total of 68 lung cancer patients with 92 metastatic brain lesions were enrolled (20 metastatic lesions only in the gray matter - group 1; and 72 metastatic lesions located in the gray and white matter junction - group 2). All patients underwent MRI examination, which involved a dual angle (2° and 15°) enhanced T1W-VIBE (volume interpolated breath-hold examination) sequence to calculate the T1 parameter map. We used the enhanced T1-3D sequence to measure the tumor volume. The vascular permeability coefficient (Ktrans) was calculated using the single-compartment Tofts model, motion registration, and quick input mode. We examined the correlations of Ktrans with the edema index (EI), Ktrans with the tumor volume, and Ktrans with the histological expression of MMP-9 or VEGF in the original lung tumor using Pearson's' correlation analysis. RESULTS: Ktrans and EI were highly correlated in group 2 (r=0.66687; P<0.001) and not correlated in group 1 (r=0.33096; P=0.15405). Ktrans was also moderately related to the positive expression of MMP-9 (r=0.50912; P<0.001) and VEGF (r=0.36995; P=0.00138) There is statistical correlation between Ktrans and EI for group 2, and no statistical correlation between Ktrans and EI for group 1. CONCLUSION: The Ktrans of the peritumoral brain edema may be used to indicate the aggressiveness and vascular permeability of brain metastases in patients with lung cancer.
PURPOSE: To use Ktrans to evaluate the aggressiveness and vascular permeability of peritumoral edema in cases of lung cancer brain metastases. MATERIALS AND METHODS: A total of 68 lung cancerpatients with 92 metastatic brain lesions were enrolled (20 metastatic lesions only in the gray matter - group 1; and 72 metastatic lesions located in the gray and white matter junction - group 2). All patients underwent MRI examination, which involved a dual angle (2° and 15°) enhanced T1W-VIBE (volume interpolated breath-hold examination) sequence to calculate the T1 parameter map. We used the enhanced T1-3D sequence to measure the tumor volume. The vascular permeability coefficient (Ktrans) was calculated using the single-compartment Tofts model, motion registration, and quick input mode. We examined the correlations of Ktrans with the edema index (EI), Ktrans with the tumor volume, and Ktrans with the histological expression of MMP-9 or VEGF in the original lung tumor using Pearson's' correlation analysis. RESULTS: Ktrans and EI were highly correlated in group 2 (r=0.66687; P<0.001) and not correlated in group 1 (r=0.33096; P=0.15405). Ktrans was also moderately related to the positive expression of MMP-9 (r=0.50912; P<0.001) and VEGF (r=0.36995; P=0.00138) There is statistical correlation between Ktrans and EI for group 2, and no statistical correlation between Ktrans and EI for group 1. CONCLUSION: The Ktrans of the peritumoral brain edema may be used to indicate the aggressiveness and vascular permeability of brain metastases in patients with lung cancer.