Congress:
ECR25
Poster Number:
C-10247
Type:
Poster: EPOS Radiologist (scientific)
Authorblock:
A. W. Marka1, M. Probst2, T. Greve1, N. Graf2, F. A. Probst2, G. Andreisek3, T. Frauenfelder3, M. Folwaczny2, E. Burian3; 1München/DE, 2Munich/DE, 3Zurich/CH
Disclosures:
Alexander Wolfgang Marka:
Nothing to disclose
Monika Probst:
Nothing to disclose
Tobias Greve:
Nothing to disclose
Niklas Graf:
Nothing to disclose
Florian Andreas Probst:
Nothing to disclose
Gustav Andreisek:
Nothing to disclose
Thomas Frauenfelder:
Nothing to disclose
Matthias Folwaczny:
Nothing to disclose
Egon Burian:
Nothing to disclose
Keywords:
Head and neck, MR, Imaging sequences, Inflammation
Patient Selection
- 21 patients (mean age 57.2 ± 13.8 years, 9 women) with 38 periapical lesions
- Included: Teeth with periapical changes on MRI without clinical signs of pulpitis
- Study conducted in compliance with Declaration of Helsinki
- Approved by institutional review boards (Ref.-No. 185/18 S and 18-657)
Imaging Protocol
The study workflow and imaging protocol are summarized in Figure 1. The following imaging modalities were used:
- MRI: 3-Tesla scanner (Ingenia, Philips Healthcare)
- 3D STIR sequence and 3D isotropic fast field echo (FFE) T1-weighted sequence (parameters shown in Table 1)
- Images obtained in axial plane, reformatted into sagittal and coronal orientations
- OPT: 2D X-ray device (Orthopos S 2D)
- Exposure: 14.1 seconds, 63 kV, 8 mA
Analysis Methods
- Independent evaluation by two readers with 3 years experience
- Bone edema assessed using STIR sequence
- Bone architecture deterioration evaluated using T1 FFE sequence
- Lesions segmented and volumes quantified
- OPT assessed using modified periapical index (PAI) score
- Signal-to-noise ratio (SNR) analyzed using standardized formula
- Statistical analysis performed using SPSS Version 29.0.0.0