Early changes in intravoxel incoherent motion MRI parameters can potentially predict response to chemoradiotherapy in rectal cancer: An animal study
Autor: | Mengsu Zeng, Liheng Liu, Guo-Feng Zhou, Sheng-Xiang Rao |
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Rok vydání: | 2020 |
Předmět: |
Adult
Male medicine.medical_specialty Necrosis Colorectal cancer medicine.medical_treatment Movement Biomedical Engineering Biophysics Urology 030218 nuclear medicine & medical imaging 03 medical and health sciences Mice 0302 clinical medicine medicine Animals Humans Radiology Nuclear Medicine and imaging Animal study Intravoxel incoherent motion Aged Chemotherapy medicine.diagnostic_test business.industry Rectal Neoplasms Magnetic resonance imaging Chemoradiotherapy Middle Aged medicine.disease Magnetic Resonance Imaging Neoadjuvant Therapy Radiation therapy Treatment Outcome Female medicine.symptom business 030217 neurology & neurosurgery |
Zdroj: | Magnetic resonance imaging. 78 |
ISSN: | 1873-5894 |
Popis: | Imaging-based approaches for early predicting response of rectal cancer to neoadjuvant chemoradiotherapy remain an ongoing-challenge. In this study, we aimed to monitor the changes of intravoxel incoherent motion (IVIM) MRI parameters during the early post-treatment period in mouse models of human rectal carcinoma, and to test whether these changes relate to the final response. Thirty-two mice with subcutaneous-tumor were randomly divided into control (n = 11), chemoradiotherapy (n = 10) and chemotherapy (n = 11) group. Tumors were monitored by IVIM at day 0, 3, 7, 9 after treatment. The final tumor response was determined by tumor remission-rate and necrosis scores. The results indicated that within 9 days after treatment, D values increased in both treated groups, but remained stable in control group. D values were significantly higher in chemotherapy group at day 7 and in each treated group at day 9 than in control group (day 7, p = 0.004; day 9: p = 0.011 and 0.009, respectively). D* values decreased in treated groups, and showed significantly lower than in control group at day 7 (p < 0.001). There was a strong positive correlation between delta D*% (D*day0 - day7/D*day0) and tumor remission rate (r = 0.707, p < 0.001), and a mild negative correlation between delta D% and tumor necrosis scores (r = -0.526, p = 0.014). D and D* values in rectal carcinoma xenograft models appeared tendency change during the early post-treatment period. In conclusion, early changes of D and D* values may have potential for predicting the final efficacy of chemoradiotherapy. |
Databáze: | OpenAIRE |
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