In the second patient group, a total of 27 vertebrae were analysed in 10 patients showing weak Pearson correlation and Bland-Altman analysis indicated no equivalence. Bland-Altman analysis indicated consistency and equivalence with a bias of 3.9 and 95% limits of agreement from -27.17 to 34.97 when comparing all pre- and intraoperative HU values of L1-5. In the first patient group, a total of 250 vertebrae were analysed in 74 patients showing a strong Pearson correlation of >.94 between pre- and intraoperative HU values. In a subgroup analysis of patient group one, radiation by means of CT Dose Index (CTDI) was compared between Canon and AIRO CT scanners. In patient group two, Canon CT scanners were used preoperatively and the O-arm Cone Beam CT (CBCT) scanner was used intraoperatively. In patient group one, Canon CT scanners were used preoperatively and the AIRO CT scanner was used intraoperatively. HU values of lumbar vertebrae were measured and compared between preoperative and intraoperative CT scans in patients undergoing lumbar interbody fusion.
In the future, it remains to be evaluated if the accuracy rates and intraoperative workflow will permit its application in deep brain stimulation and other functional procedures as well.ĪIRO® Biopsy Intraoperative CT Intraoperative imaging Stereotactic surgery.To evaluate the accuracy of intraoperatively measured computed tomography (CT) Hounsfield unit (HU) values by comparison with preoperative CT HU values and to compare the radiation exposure between preoperative and intraoperative CT scans. We conclude that the AIRO® system is a safe, easy-to-use, and sufficiently accurate iCT for CT frame-based stereotactic biopsy planning that results in a considerable reduction of surgery time. Net surgery time was reduced by 38 min, on average. A conclusive histological result was obtained in 46 of the 50 cases included. The MRI/iCT image fusion was feasible in all of the studies. The frame-based stereotactic iCT was easy to implement and successfully accomplished in all patients. manufacturer: Mobius Medical Systems model: Airo 32 Slicereference number: 23C14year: 2021availability: Available. After fusion of the preoperative MRI and AIRO® iCT, the stereotactic system was built based on the iCT, and trajectories were calculated accordingly. Categories: Medical Equipment for Sale, Used or Refurbished CT Scanners. Based on MTF analysis, both Soft and Standard filters of the AIRO system lost resolution quickly compared to the Sensation 64 slice CT.
The imaging data were transferred to a conventional stereotaxy working unit. Under identical technique factors radiation dose (mGy/mAs) from the AIRO mobile CT system (AIRO) is higher than that from a 64 slice CT scanner. Here, we report the first 50 patients who underwent stereotactic biopsies using the mobile AIRO® intraoperative CT (iCT) scanner.Ī conventional stereotactic frame was mounted to the AIRO® carbon table via carbon adapter. The intraoperative transport of the anesthetized and intubated patient to and from the CT unit can be time-consuming and cumbersome. It generally follows a workflow including preoperative MRI and intraoperative frame-based CT. In frame-based stereotactic surgery, intraoperative imaging is crucial.
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