Volume 41, Issue 6 pp. 1528-1540
Original Research

Early response to chemoradiotherapy for nasopharyngeal carcinoma treatment: Value of dynamic contrast-enhanced 3.0 T MRI

Dechun Zheng MS

Dechun Zheng MS

Department of Radiology, Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute, Fuzhou, Fujian, People's Republic of China

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Yunbin Chen MD

Corresponding Author

Yunbin Chen MD

Department of Radiology, Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute, Fuzhou, Fujian, People's Republic of China

Address reprint requests to: Y.C., No.420, Fuma Road, Fuzhou, Fujian, People's Republic of China 350014. E-mail: [email protected]Search for more papers by this author
Xiangyi Liu MS

Xiangyi Liu MS

Department of Radiology, Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute, Fuzhou, Fujian, People's Republic of China

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Ying Chen BS

Ying Chen BS

Department of Radiology, Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute, Fuzhou, Fujian, People's Republic of China

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Luying Xu BS

Luying Xu BS

Department of Radiation Oncology, Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute, Fuzhou, Fujian, People's Republic of China

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Wang Ren MS

Wang Ren MS

Department of Radiology, Fujian Medical University Teaching Hospital, Fujian Provincial Cancer Hospital & Institute, Fuzhou, Fujian, People's Republic of China

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Weibo Chen MSc

Weibo Chen MSc

Philips Healthcare, Shanghai, People's Republic of China

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Queenie Chan PhD

Queenie Chan PhD

Philips Healthcare, Hong Kong

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First published: 18 August 2014
Citations: 37

The first two authors are co-first authors and contributed equally to this work.

Abstract

Purpose

To prospectively evaluate the dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) value for predicting early nasopharyngeal carcinoma (NPC) chemoradiotherapy (CRT) response.

Materials and Methods

Forty-two patients with advanced NPC were recruited and received three DCE-MRI exams before treatment (Pre-Tx), as well as 3 days (Day 3-Tx) and 40 days (Day 40-Tx) after chemotherapy initiation (two neoadjuvant chemotherapy cycles, NAC). We used DCE-Tool to measure primary tumor kinetic parameters (Ktrans, Kep, ve, and vp) using the extended Tofts model. Kinetic parameters and corresponding changes were compared between responders and nonresponders after NAC or CRT treatment using Student's t or Mann–Whitney U tests.

Results

Response to two NAC cycles correlated with short-term local control (P = 0.01). Compared to the nonresponder group, the responder group presented with significantly larger ΔKtrans(0–3), ΔKep(0–3), and Δvp(0–3) values after NAC (P < 0.05). The complete response group after CRT exhibited significantly lower Ktrans(Day 40-Tx) and larger ΔKtrans(0–3) values than the residual group (P = 0.05). High sensitivity (range: 74.1%–90%) and moderate-to-high specificity (range: 50%–84.3%) distinguished nonresponders from responders grouping after NAC or CRT, with diagnostic efficiency ranging from 69.3%–88%.

Conclusion

Our study showed kinetic parameter changes earlier after chemotherapy were potential markers for NPC patients receiving CRT therapy following NAC. J. Magn. Reson. Imaging 2015;41:1528–1540. © 2014 Wiley Periodicals, Inc.

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