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The Value of Low-dose Prospective Dual-energy Computed Tomography with Iodine Mapping in the Diagnosis of Gastric Cancer

Author(s):

Lifeng Wang, Xingxing Jin, Zhenguo Qiao*, Bin Xu and Jiaqing Shen   Pages 1 - 4 ( 4 )

Abstract:


Objective: This study investigated the radiation dose and value of prospective dual-energy computed tomography (DECT) in the diagnosis of gastric cancer.

Materials and Methods: Sixty patients scheduled for computed tomography (CT) for preoperative staging were divided into two groups. Thirty patients (Group A) underwent a single contrast-enhanced abdominal CT acquisition using a dual-source mode (100 kV/140 kV). Weighted average images of the two kilovolt acquisitions and iodine maps were created. The remaining 30 patients underwent a standard CT scan (Group B). Two observers performed a blinded read of the images for gastric lesions, evaluating the image quality and recording effective dose.

Results: D During the blinded read, observers found 90% (27/30) of the cancers in both groups. The mean imaging quality scores were 2.1±0.9 for Group A, and 2.3±1.1 for Group B. The effective mean doses were 6.59±0.59 mSv and 25.86±0.44 mSv for Groups A and B respectively. Compared with the control group (B), the imaging quality in the low-dose group decreased a little, but the radiation dose substantially decreased, by 74.6%.

Conclusions: The new DECT technique is valuable for examining gastric cancer patients. The dual-kV scan mode can substantially reduce radiation dose while preserving good diagnostic image quality.

Keywords:

Computed tomography (CT), radiation dose, diagnosis, gastric cancer

Affiliation:

Department of Intervention, the First People`s Hospital of Wujiang District, Suzhou, Department of Gastroenterology, the First People`s Hospital of Yancheng, Yancheng, Department of Gastroenterology, the First Affiliated Hospital of Soochow University, Suzhou, Department of Intervention, the First People`s Hospital of Wujiang District, Suzhou, Department of Gastroenterology, the First People`s Hospital of Wujiang District, Suzhou



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