Organ-based tube current modulation in chest CT. A comparison of three vendors

Introduction Organ-based tube current modulation (OBTCM) is designed for anterior dose reduction in Computed Tomography (CT). The purpose was to assess capability chest CT using three organ systems at different kVp settings. Furthermore, noise, diagnostic image quality and tumour detection assessed. Methods A Lungman phantom scanned with without OBTCM 80–135/140 scanners; Canon Aquillion Prime, GE Revolution Siemens Somatom Flash. Thermo-luminescent dosimeters were attached the surface all scans repeated five times. Image noise measured ROIs level of carina. Three observers visually scored images a fivestep scale. Wilcoxon Signed-Rank test used statistical analysis differences. Results Using revolution scanner, reductions between 1.10 mSv (12%) 1.56 (24%) (p < 0.01) found segment no differences posteriorly laterally. Total 0.64 (8%) 0.91 (13%) across levels 0.00001). Maximum increase 0.8 HU. With system, 6–10% total 0.74–0.76 0.001) maximum 1.1 For increased by 22–51% anteriorly; except 100 where difference found. Noise decreased 1 1.5 Conclusion Organ based capable minimal loss vendors that do not posterior dose. Implications practice This research highlights importance being familiar technologies.