Diffusion-weighted MRI versus 18F-FDG PET/CT: Performance as predictors of tumor treatment response and patient survival in patients with non-small cell lung cancer receiving chemoradiotherapy

Yoshiharu Ohno, Hisanobu Koyama, Takeshi Yoshikawa, Keiko Matsumoto, Nobukazu Aoyama, Yumiko Onishi, Kazuro Sugimura

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)

Abstract

OBJECTIVE. The purpose of this study was to compare the predictive capabilities of diffusion-weighted MRI (DWI) and 18F-FDG PET/CT for tumor response to therapy and survival in patients with non-small cell lung cancer (NSCLC) receiving chemoradiotherapy. SUBJECTS AND METHODS. The study included 64 patients with NSCLC diagnosed as stage III who underwent pretherapeutic DWI and FDG PET/CT and were treated with chemoradiotherapy. For quantitative prediction, apparent diffusion coefficient (ADC) for DWI and maximum standardized uptake value (SUV max) for PET/CT were measured at all targeted lesions and averaged to obtain final values for each patient. To evaluate the predictive capability of either index for distinguishing partial response and nonresponse (stable or progressive disease) groups, receiver operating characteristic analysis was performed, and sensitivity, specificity, and accuracy of the two modalities were compared using the McNemar test. Finally, overall and progression-free survival curves divided by the corresponding threshold value were compared by means of the log-rank test. RESULTS. The area under the curve (A z) for ADC (A z = 0.84) was significantly larger than that for SUV max (A z = 0.64, p < 0.05). The application of feasible threshold values resulted in specificity (44.4%) and accuracy (76.6%) of DWI becoming significantly higher than those of PET/CT (specificity, 11.1%; p < 0.05 and accuracy, 67.2%, p < 0.05). In addition, only overall survival and progression-free survival of the two groups divided by ADC at 2.1 × 10 -3 mm 2/s and SUV max at 10 showed a significant difference (p < 0.05). CONCLUSION. DWI may have better potential than FDG PET/CT for prediction of tumor response to therapy in NSCLC patients before chemoradiotherapy.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalAmerican Journal of Roentgenology
Volume198
Issue number1
DOIs
Publication statusPublished - 01-2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Diffusion-weighted MRI versus <sup>18</sup>F-FDG PET/CT: Performance as predictors of tumor treatment response and patient survival in patients with non-small cell lung cancer receiving chemoradiotherapy'. Together they form a unique fingerprint.

Cite this