Magnetresonanztomographie nach Kryoablation langer Röhrenknochen im Tiermodell
| Autor: | Neumann L, Smekal Uv, F. Popken, H. U. Kasper, Peer Eysel, J. W.-P. Michael, M. Bosse, Winnekendonk G, KJ Lackner, Tietz A |
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| Rok vydání: | 2005 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test business.industry medicine.medical_treatment Femoral Neoplasms Cryotherapy Cryoablation Magnetic resonance imaging Mr imaging Animal model Normal bone medicine.anatomical_structure medicine Radiology Nuclear Medicine and imaging Radiology Bone marrow business |
| Zdroj: | RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 177:564-568 |
| ISSN: | 1438-9010 1438-9029 |
| DOI: | 10.1055/s-2005-857905 |
| Popis: | Purpose To describe the MR findings following cryoablation of long bones. Materials and method Cryoablation was performed in femoral and tibial bones of 24 sheep under general anesthesia. MRI of the treated and untreated contralateral bones was performed immediately thereafter and at 2, 4 and 6 months after the cryosurgical procedure. Results On the MRI performed immediately after cryotherapy, the lesions showed low signal intensities relative to the normal bone marrow on unenhanced T1- and T2-weighted images. At 2, 4 and 6 months after cryoablation, the lesions showed high signal intensities on STIR images, low signal intensities on T1-weighted and heterogeneous enhancement on contrast-enhanced T1-weighted MR images. The femoral lesions decreased in size from 31 +/- 3 mm immediately after the cryotherapy to 13 +/- 4 mm 6 month later and the tibial lesions from 29 +/- 7 mm to 19 +/- 4 mm. Conclusion MRI shows bone marrow lesions immediately after cryotherapy and can easily monitor healing lesions. MR imaging is suitable for following cryotherapy. |
| Databáze: | OpenAIRE |
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