Low dose Gemstone Spectrum CT in guiding percutaneous lung biopsy / 中国介入影像与治疗学

ABSTRACT

Objective To explore the feasibility of low dose Gemstone Spectrum CT in guiding percutaneous lung puncture biopsy. Methods Totally 80 patients underwent Gemstone Spectrum CT-guided lung puncture biopsy were enrolled. Conventional dose and low-dose CT (noise index [NI]=20, 24, 28) scanning in turn were performed on the progress of biopsy location. The quality of CT image, CT volume dose index (CTDIvol), dose length product (DLP) and effective dose (ED) were compared between conventional dose and low dose CT images. Results Both conventional dose and low dose CT images clearly showed the location relationship between puncture needle and lesion and met the need of puncture. There was no statistical significance of CT image quality among low dose CT images of NI=20, 24, 28 and conventional dose CT images (P=0.08). Meanwhile, significant differences of CTDIvol, DLP and ED were found among low doses CT images of NI=20, 24, 28 and conventional dose CT images (all P<0.01). With the increasing of NI, CTDIvol, DLP and ED decreased gradually (all P<0.05). Conclusion Low-dose scanning scheme of Gemstone Spectrum CT could meet the need of percutaneous lung puncture biopsy and reduce the radiation dose.