Dual-Energy CT in Patients Treated with Anti-Angiogenic Agents for Non-Small Cell Lung Cancer: New Method of Monitoring Tumor Response?.
10.3348/kjr.2012.13.6.702
- Author:
Yoo Na KIM
1
;
Ho Yun LEE
;
Kyung Soo LEE
;
Joon Beom SEO
;
Myung Jin CHUNG
;
Myung Ju AHN
;
Keunchil PARK
;
Tae Sung KIM
;
Chin A YI
Author Information
1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea. hoyunlee96@gmail.com
- Publication Type:Original Article
- Keywords:
Targeted therapy;
Tumor response assessment;
Response criteria;
Guideline;
Non-small cell lung cancer;
Dual energy CT
- MeSH:
Adult;
Aged;
Angiogenesis Inhibitors/*therapeutic use;
Antibodies, Monoclonal, Humanized/*therapeutic use;
Carcinoma, Non-Small-Cell Lung/drug therapy/*radiography;
Female;
Humans;
Image Processing, Computer-Assisted;
Lung Neoplasms/drug therapy/*radiography;
Male;
Middle Aged;
*Tomography, X-Ray Computed
- From:Korean Journal of Radiology
2012;13(6):702-710
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To evaluate tumor responses in patients treated with anti-angiogenic agents for non-small cell lung cancer (NSCLC) by assessing intratumoral changes using a dual-energy CT (DECT) (based on Choi's criteria) and to compare it to traditional Response Evaluation Criteria in Solid Tumors (RECIST) criteria. MATERIALS AND METHODS: Ten NSCLC patients treated with bevacizumab underwent DECT. Tumor responses to anti-angiogenic therapy were assessed and compared with the baseline CT results using both RECIST (size changes only) and Choi's criteria (reflecting net tumor enhancement). Kappa statistics was used to evaluate agreements between tumor responses assessed by RECIST and Choi's criteria. RESULTS: The weighted kappa value for the comparison of tumor responses between the RECIST and Choi's criteria was 0.72. Of 31 target lesions (21 solid nodules, 8 lymph nodes, and two ground-glass opacity nodules [GGNs]), five lesions (16%) showed discordant responses between RECIST and Choi's criteria. Iodine-enhanced images allowed for a distinction between tumor enhancement and hemorrhagic response (detected in 14% [4 of 29, excluding GGNs] of target lesions on virtual nonenhanced images). CONCLUSION: DECT may serve as a useful tool for response evaluation after anti-angiogenic treatment in NSCLC patients by providing information on the net enhancement of target lesions without obtaining non-enhanced images.
