Role of Various DW MRI and DCE MRI Parameters as Predictors of Malignancy in Solid Pulmonary Lesions
Open Access
- 8 April 2020
- journal article
- research article
- Published by SAGE Publications in Canadian Association of Radiologists Journal
- Vol. 72 (3), 525-532
- https://doi.org/10.1177/0846537120914894
Abstract
We aimed to evaluate various diffusion and dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) parameters in differentiating malignant from benign pulmonary lesions. We enrolled 31 (22 males) patients who had solid pulmonary lesion(s) >2 cm in our cross sectional study. Of these, 23 (74.2%) were found to be malignant on histopathology. Dynamic contrast-enhanced MRI was performed using 36 dynamic measurements (volumetric interpolated breath-hold examination). Diffusion-weighted MRI (DW MRI) performed at b value of 800 s/mm2. We measured different diffusion and perfusion parameters, for example, diffusion-weighted imaging (DWI) SI, mean apparent diffusion coefficient (ADC), minimum ADC, lesion-to-spinal cord ratio, DWI score, T2 score, Ktrans, Kep, and Ve. We stratified values of each parameter as high if it was >median of values observed in our data set and low if it was ≤median. Normally distributed data were compared by unpaired t test, whereas non-normal continuous data were compared by Kruskal Wallis-H test. We applied Wilson score method to calculate sensitivity, specificity, and predictive values of parameters that were statistically significant by type of lesion with reference to histopathological examination as gold standard. Diffusion-weighted imaging SI, mean ADC, minimum ADC, DWI score and Ktrans values were found to be significantly different (P value < .05) by type of lesion. Ktrans was found to have the highest diagnostic accuracy (74.2%) among these parameters. Ktrans and mean ADC had similar sensitivity of 65.2%. However, Ktrans had highest diagnostic accuracy among various DWI and DCE MRI parameters in predicting malignancy in solid pulmonary lesions. In our study, we found a cutoff value 0.251 min−1 for Ktrans as 100% specific.Keywords
This publication has 26 references indexed in Scilit:
- Differentiation of malignant and benign lung lesions with diffusion-weighted MR imagingRadiology and Oncology, 2012
- Diffusion magnetic resonance imaging of chest tumorsCancer Imaging, 2012
- MRI in lung cancer: a pictorial essayThe British Journal of Radiology, 2011
- Dynamic contrast-enhanced MR imaging for differentiation of rounded atelectasis from neoplasmJournal of Magnetic Resonance Imaging, 2010
- The value of diffusion-weighted imaging for monitoring the chemotherapeutic response of osteosarcoma: a comparison between average apparent diffusion coefficient and minimum apparent diffusion coefficientSkeletal Radiology, 2009
- Respiratory motion‐compensated radial dynamic contrast‐enhanced (DCE)‐MRI of chest and abdominal lesionsMagnetic Resonance in Medicine, 2008
- Can Malignant and Benign Pulmonary Nodules Be Differentiated with Diffusion-Weighted MRI?American Journal of Roentgenology, 2008
- Diffusion-Weighted Magnetic Resonance Imaging for Diagnosing Malignant Pulmonary Nodules/Masses: Comparison with Positron Emission TomographyJournal of Thoracic Oncology, 2008
- Diffusion-Weighted MRI in the Body: Applications and Challenges in OncologyAmerican Journal of Roentgenology, 2007
- Extracranial applications of diffusion-weighted magnetic resonance imagingEuropean Radiology, 2007