Quantitative intravoxel incoherent motion parameters derived from whole‐tumor volume for assessing pathological complete response to neoadjuvant chemotherapy in locally advanced rectal cancer
Tóm tắt
Many locally advanced rectal cancer (LARC) patients can benefit from neoadjuvant chemotherapy (NACT), with some achieving a pathological complete response (pCR). However, there is limited research reporting on the value of intravoxel incoherent motion (IVIM) in monitoring pCR in patients with LARC.
To identify whether IVIM parameters derived from whole‐tumor volume (WTV) before and after NACT could accurately assess pCR in patients with LARC.
Prospective patient control study.
Fifty‐one patients with LARC before and after NACT, prior to surgery.
IVIM‐diffusion imaging at 3T.
Apparent diffusion coefficient (ADC), slow diffusion coefficient (D), fast diffusion coefficient (D*), and perfusion‐related diffusion fraction (
DWI‐derived ADC and IVIM‐derived parameters and their percentage changes (ΔADC%, ΔD%, ΔD*%, and Δ
Compared with the non‐pCR group, the pCR group exhibited significantly lower pre‐ADCmean (
The IVIM‐derived D value is a promising tool in predicting the pCR status before therapy. The percentage changes in D values after therapy may help assess the pCR status prior to surgery.
J. Magn. Reson. Imaging 2017.
Từ khóa
Tài liệu tham khảo
Hu F, 2017, The value of diffusion kurtosis imaging in assessing pathological complete response to neoadjuvant chemoradiation therapy in rectal cancer: a comparison with conventional diffusion‐weighted imaging, Oncotarget
Engin G, 2012, Can diffusion‐weighted MRI determine complete responders after neoadjuvant chemoradiation for locally advanced rectal cancer?, Diagn Interv Radiol, 574
Lu W, 2017, Intravoxel incoherent motion diffusion‐weighted imaging for discriminating the pathological response to neoadjuvant chemoradiotherapy in locally advanced rectal cancer, Sci Rep‐UK, 7
2010, World Health Organization Classification of Tumours of the Digestive System, 134