| Literature DB >> 31727378 |
Hexuan Wang1, Bradley Mills2, Reem Mislati1, Rifat Ahmed1, Scott A Gerber2, David Linehan2, Marvin M Doyley3.
Abstract
Neither contrast-enhanced computed tomography nor magnetic resonance imaging can monitor changes in the pancreatic ductal adenocarcinoma microenvironment during therapy. We hypothesized that shear wave elastography could overcome this limitation. To test this hypothesis, we measured the shear modulus of two groups of murine pancreatic tumors (KCKO, n = 30; PAN02, n = 30) treated with stereotactic body radiation therapy (SBRT). The mean shear modulus of KCKO tumors was 7.651 kPa higher than that of PAN02 tumors (p < 0.001). SBRT reduced the shear modulus in KCKO tumors by 8.914 kPa (p < 0.001). No significant difference in the shear modulus of SBRT-treated PAN02 tumors was observed. Additionally, necrotic and collagen densities were reduced only in the SBRT-treated KCKO tumors. Shear modulus was dependent on collagen distribution and histological texture parameters (i.e., entropy and fractional dimension). Shear wave elastography imaging differentiates between SBRT-responsive (KCKO) and non-responsive (PAN02) tumors.Entities:
Keywords: Pancreatic ductal adenocarcinoma; Shear modulus; Stereotactic body radiation therapy; Tumor microenvironment
Year: 2019 PMID： 31727378 PMCID： PMC7060930 DOI： 10.1016/j.ultrasmedbio.2019.10.005
Source DB: PubMed Journal: Ultrasound Med Biol ISSN： 0301-5629 Impact factor: 2.998