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Utilizing gemstone spectral CT imaging to evaluate the therapeutic efficacy of radiofrequency ablation in lung cancer

  • CHEST RADIOLOGY
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Abstract

Purpose

To evaluate the therapeutic efficacy of radiofrequency ablation (RFA), quantitative water-based, and iodine-based images of gemstone spectral computed tomography (CT) were analyzed.

Patients and methods

30 patients underwent lung RFAs from March 2012 to March 2013. Through enhanced chest scans, we obtained the tumor size values by conventional CT images, and quantitatively analyzed the densities of iodine and water in lung tumors from water-based and iodine-based material decomposition images.

Results

Tumors in 22 cases increased in size after RFA while there was no detectable change in the remaining 8 cases. Through water-based material decomposition images, the water content in the tumors increased from (1014.76 ± 6.83 mg/mL) to (1022.71 ± 10.16 mg/mL) after RFA, and this difference was significant (t = −2.329, p < 0.05). Through iodine-based material decomposition images, the iodine content in the tumors was 2.49 ± 0.74 mg/mL before RFA. The tumors were mostly or completely necrotized after RFA and the iodine content in the area of necrosis reduced to 0.45 ± 0.29 mg/m (t = 11.072, p = 0.000).

Conclusion

By comparing the tumor size, water content and iodine content before and after RFA, we can visualize the morphology and metabolic states of the tumors and evaluate the therapeutic efficiency.

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Authors and Affiliations

  1. Department of Thoracic Surgery, Xuanwu Hospital of Capital Medical University, Beijing, China

    Lei Liu, Xiuyi Zhi, Baodong Liu & Yi Zhang

Authors
  1. Lei Liu
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  2. Xiuyi Zhi
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  3. Baodong Liu
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  4. Yi Zhang
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Correspondence to Yi Zhang.

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No conflict of interest exists.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional.

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Informed consent was obtained from all individual participants included in the study.

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Liu, L., Zhi, X., Liu, B. et al. Utilizing gemstone spectral CT imaging to evaluate the therapeutic efficacy of radiofrequency ablation in lung cancer. Radiol med 121, 261–267 (2016). https://doi.org/10.1007/s11547-015-0602-5

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  • DOI: https://doi.org/10.1007/s11547-015-0602-5

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