Comparison on value of energy spectrum CT and ultrasound in monitoring bone transport / 中国医学影像技术

ABSTRACT

Objective To compare monitoring value of energy spectrum CT and ultrasound in bone transport process. Methods Eighteen patients who underwent bone transport were examined with energy spectrum CT and ultrasonography at the 2nd, 4th, 6th week and 8th week after surgery, and the construction of lateral callus, the formation of callus in the intramedullary cavity, the range of organized hematoma and the nature of the vesicular area were observed, the length of bone extension area and organized hematoma were measured. The radiation dose of energy spectrum CT scan was also calculated. Results Primary callus structures were observed on CT and ultrasound at the 2nd to 8th week after surgery, and the callus and cortical bone could not be distinguished by ultrasound at the 8th weeks. At the 2nd to 8th week after surgery, both CT and ultrasound could observe the range of organized hematoma and the increased quantity of callus in the intramedullary cavity. There was no statistically significant difference of the length of systemic hematoma nor bone extension area measured with CT and ultrasound at the 2nd and 4th week after surgery (all P>0.05), while significant difference was detected in the length of systemic hematoma and bone extension area measured at the 6th weeks after surgery (both P0.05), while CT energy spectrum curve could identify the nature of fluid vesicles. The effective radiation dose of energy spectrum CT was (0.71±0.71)mSv. Conclusion Energy spectrum CT and ultrasound both have advantages in monitoring the formation of regenerated tissue during bone transport. Energy spectrum technology can be used as a new monitoring method.