Iplan cmf 3

The preoperative virtual plans were designed with the Brainlab iPlan CMF 3.0 software. We regarded the centre point of the left and right condyle as points A and B, respectively. Point D was the midpoint between point A and B. The sagittal plane was defined as a reference plane through point D and was perpendicular to the line AB. For those patients with condylar fractures, the reference plane is a sagittal plane through the comb. According to the established symmetric plane, the affected side model was obtained by mirroring the healthy side. Then, the mirrored images were manually adjusted to fit the adjacent anatomical structures. The final preoperative virtual plan was collected and saved in digital imaging and communications in Standard Triangle Language (STL) format to help with intraoperative and postoperative analysis.

All patients were subjected to standard preoperative head and neck computed tomography (CT) scan (field of view, 20 cm; pitch, 1.0; slice thickness, 1.25 mm; 140-160 mA, pixel density, 512 × 512); and magnetic resonance imaging (MRI; T2-weighted sequence, 1.5T (1T = 800 kA/m); slice thickness, 2 mm; pixel density, 512 × 512). Patients were required to maintain full intercuspal position during imaging. Digital Imaging and Communication in Medicine (DICOM) data of CT and MRI were uploaded to iPlan CMF 3.0 software (BrainLAB, Feldkirchen, Germany). Image fusion was performed using automatic fusion technique, with the tumor set as the region of interest (ROI) in both datasets. After accurate alignment of CT and MRI images at each slice, tumor mapping was performed on the MRI dataset (Figure 1A). The iPlan CMF 3.0 software enabled automatic registration of the two datasets, with bony structures as the references (Figure 1B). Finally, the mapped tumor margins on MRI were projected on to the CT datasets (Figure 1C). Using the multimodal image fusion technique, tumor margins were mapped and the surgical margins were planned virtually to ensure safe surgical margins during the actual surgery.