胡永成(Hu Yongcheng，Dept Orthop，Tianjin Hosp，Tianjin 300211)…∥Chin J Orthop.－2010，31(1).－1～6

Digital measurement of bone tumor volume by CT three-dimensional reconstruction technology

胡永成(Hu Yongcheng，Dept Orthop，Tianjin Hosp，Tianjin 300211)…∥Chin J Orthop.－2010，31(1).－1～6

ObjectiveTo discuss the measurement of bone tumor volume on the basis of three dimensional images segmentation technology.MethodsTwenty patients with lacunar bone tumor from Tianjin Hospital and Tongji Hospital were included in the study from January 2010 to August 2010.There were 11 males and 9 females.Each patient was exposed to spiral CT preoperatively.Then these primitive CT dates were imported into digital orthopedics clinical research platform(SuperImage orthopedics edition 1.1，Cybermed Ltd).The volume and maximum diameter of bone tumor were measured before operation by three-dimensional reconstruction technology.The actual tumor volume was measured during the operation.The tumor volume was also calculated from plain X-rays and CT scans as ellipsoidal or cylindrical depending on the tumor configuration and presence or absence of a soft tissue component.ResultsThe tumor volume was measured to be(14.92 ±7.34)mm3，(16.65 ±6.95)mm3and(34.29 ±15.70)mm3using threedimensional reconstruction technology，intraoperative elevation，and traditional radiograph measurement separately.It was found that there was no difference regarding the outcomes of measurement between three-dimensional reconstruction technology and gross intraoperative measurement.But obvious difference was detected between gross intraoperative measurement and traditional radiograph measurement.Coefficient of correlation between diameter and volume of bone tumor was 0.325(P=0.162).ConclusionDigital measurement is a precise，efficient，convenient and repeatable method for bone tumor measurement.19 refs，2 figs.

(Authors)