Asset Details
Do you wish to reserve the book?
Early evaluation of irradiated parotid glands with intravoxel incoherent motion MR imaging: correlation with dynamic contrast-enhanced MR imaging
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Early evaluation of irradiated parotid glands with intravoxel incoherent motion MR imaging: correlation with dynamic contrast-enhanced MR imaging
Do you wish to request the book?
Early evaluation of irradiated parotid glands with intravoxel incoherent motion MR imaging: correlation with dynamic contrast-enhanced MR imaging
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Early evaluation of irradiated parotid glands with intravoxel incoherent motion MR imaging: correlation with dynamic contrast-enhanced MR imaging
2016
Overview
Background
Radiation-induced parotid damage is one of the most common complications in patients with nasopharyngeal carcinoma (NPC) undergoing radiotherapy (RT). Intravoxel incoherent motion (IVIM) magnetic resonance (MR) imaging has been reported for evaluating irradiated parotid damage. However, the changes of IVIM perfusion-related parameters in irradiated parotid glands have not been confirmed by conventional perfusion measurements obtained from dynamic contrast-enhanced (DCE) MR imaging. The purposes of this study were to monitor radiation-induced parotid damage using IVIM and DCE MR imaging and to investigate the correlations between changes of these MR parameters.
Methods
Eighteen NPC patients underwent bilateral parotid T1-weighted, IVIM and DCE MR imaging pre-RT (2 weeks before RT) and post-RT (4 weeks after RT). Parotid volume; IVIM MR parameters, including apparent diffusion coefficient (ADC), pure diffusion coefficient (D), pseudo-diffusion coefficient (D*), and perfusion fraction (f); and DCE MR parameters, including maximum relative enhancement (MRE), time to peak (TTP), Wash in Rate, and the degree of xerostomia were recorded. Correlations of parotid MR parameters with mean radiation dose, atrophy rate and xerostomia degree, as well as the relationships between IVIM and DCE MR parameters, were investigated.
Results
From pre-RT to post-RT, all of the IVIM and DCE MR parameters increased significantly (
p
< 0.001 for ADC, D, f, MRE, Wash in Rate;
p
= 0.024 for D*;
p
= 0.037 for TTP). Change rates of ADC, f and MRE were negatively correlated with atrophy rate significantly (all
p
< 0.05). Significant correlations were observed between the change rates of D* and MRE (
r
= 0.371,
p
= 0.026) and between the change rates of D* and TTP (
r
= 0.396,
p
= 0.017). The intra- and interobserver reproducibility of IVIM and DCE MR parameters was good to excellent (intraclass correlation coefficient, 0.633–0.983).
Conclusions
Early radiation-induced changes of parotid glands could be evaluated by IVIM and DCE MR imaging. Certain IVIM and DCE MR parameters were correlated significantly.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V
Subject
/ Aged
/ Biomedical and Life Sciences
/ Carcinoma - diagnostic imaging
/ Female
/ Health Promotion and Disease Prevention
/ Humans
/ Image Processing, Computer-Assisted
/ Magnetic Resonance Imaging - methods
/ Male
/ Medical and radiation oncology
/ Motion
/ Nasopharyngeal Neoplasms - diagnostic imaging
/ Nasopharyngeal Neoplasms - radiotherapy
/ Oncology
/ Parotid Gland - diagnostic imaging
/ Parotid Gland - radiation effects
/ Tumors
