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- Title
Value of bone suppression software in chest radiographs for improving image quality and reducing radiation dose.
- Authors
Hong, Gil-Sun; Do, Kyung-Hyun; Son, A-Yeon; Jo, Kyung-Wook; Kim, Kwang Pyo; Yun, Jihye; Lee, Choong Wook
- Abstract
Objectives: To compare image quality and radiation dose between dual-energy subtraction (DES)–based bone suppression images (D-BSIs) and software-based bone suppression images (S-BSIs). Methods: Chest radiographs (CXRs) of forty adult patients were obtained with the two X-ray devices, one with DES and one with bone suppression software. Three image quality metrics (relative mean absolute error (RMAE), peak signal-to-noise ratio (PSNR), and structural similarity index (SSIM)) between original CXR and BSI for each of D-BSI and S-SBI groups were calculated for each bone and soft tissue areas. Two readers rated the visual image quality for original CXR and BSI for each of D-BSI and S-SBI groups. The dose area product (DAP) values were recorded. Paired t test was used to compare the image quality and DAP values between D-BSI and S-BSI groups. Results: In bone areas, S-BSIs had better SSIM values than D-BSI (94.57 vs. 87.77) but worse RMAE and PSNR values (0.50 vs. 0.20; 20.93 vs. 34.37) (all p < 0.001). In soft tissue areas, S-BSIs had better SSIM values than D-BSI (97.56 vs. 91.42) but similar RMAE and PSNR values (0.29 vs. 0.27; 31.35 vs. 29.87) (all p < 0.001). Both readers gave S-BSIs significantly higher image quality scores than D-BSI (p < 0.001). The mean DAP in software-related images (0.98 dGy·cm2) was significantly lower than that in the DES-related images (1.48 dGy·cm2) (p < 0.001). Conclusion: Bone suppression software significantly improved the image quality of bone suppression images with a relatively lower radiation dose, compared with dual-energy subtraction technique. Key Points: • Bone suppression software preserves structure similarity of soft tissues better than dual-energy subtraction technique in bone suppression images. • Bone suppression software achieves superior image quality for lung lesions than dual-energy subtraction technique in bone suppression images. • Bone suppression software can decrease the radiation dose over the hardware-based image processing technique.
- Subjects
CHEST X rays; RADIATION doses; LUNG diseases; IMAGE processing; SIGNAL-to-noise ratio
- Publication
European Radiology, 2021, Vol 31, Issue 7, p5160
- ISSN
0938-7994
- Publication type
Article
- DOI
10.1007/s00330-020-07596-w