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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
Purpose This study aimed to: Compare and correlate bone edema volume detected by 3D-short-tau-inversion-recovery (STIR) sequence to osseous decay detected by T1-based sequence and conventional panoramic radiography (OPT) Determine volume thresholds for structural changes in MRI Delineate the extent of structural changes within periapical and alveolar bone that remain undetected with conventional diagnostic imaging
Read more Methods and materials 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 ProtocolThe 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...
Read more Results Detection and Volume ComparisonAs shown in Table 2, the analysis revealed: 23 lesions: Reactive bone edema on STIR + bone alterations in T1 with corresponding OPT radiolucency 15 lesions: Detected by STIR only Significant volume differences: STIR OPT-positive: 207.3 ± 191.1 mm³ STIR OPT-negative: 29.5 ± 34.2 mm³ (p < 0.001) T1 OPT-positive: 109.3 ± 124.3 mm³ T1 OPT-negative: 1.9 ± 5.1 mm³ (p < 0.001) Figure 2 demonstrates a representative case of periapical bone edema visualized by STIR sequence with corresponding T1 changes and OPT findings.CorrelationsTable 3...
Read more Conclusion The study demonstrates that: Bone edema volume visualized by STIR sequence exceeds bone architecture changes indicated in T1-based imaging, as shown in our volumetric analysis (Table 2) MRI can detect periapical inflammation before manifestation in conventional radiography (Figure 2) Volume measurements show strong diagnostic performance in distinguishing OPT-positive from OPT-negative lesions (Table 4) STIR sequence implementation could improve early detection in preventive and conservative dentistry These findings highlight MRI's potential for early, quantitative detection of alveolar bone inflammation before structural osseous lesions manifest, offering new...
Read more References Marka, A.W., Probst, M., Greve, T. et al. Periapical bone edema volume in 3D MRI is positively correlated with bone architecture changes. Insights Imaging 16, 26 (2025). https://doi.org/10.1186/s13244-025-01903-z
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