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Postoperative MRI in patients undergoing interstitial laser coagulation thermotherapy of benign prostatic hyperplasia
U G Mueller-Lisse1, A F Heuck, P Schneede
1Institute of Diagnostic Radiology, Klinikum Grosshadern, University of Munich, Germany.
Objective:
We conducted MRI of the effects of laser-induced thermal therapy (LITT) in benign prostatic hyperplasia (BPH).
Materials And Methods:
Eighteen patients (average age 64 years) were examined with MRI 24-48 h before and after LITT of BPH. Sagittal and axial T2-weighted FSE MR images were evaluated for signs of coagulation necrosis in the prostate gland and the presence of intra- and extraprostatic edema.
Results:
Coagulation areas showed as a hypointense central core with a hyperintense rim. Intraprostatic edema led to a volume increase of 18-108% both in the central and in the total gland. Periprostatic edema was severe in preprostatic and prevesical tissue as well as lateral to the prostate, moderate in the presacral space, and mild perirectally and dorsal to the prostate. Follow-up examinations 2 weeks to 6 months after LITT in five patients showed decrease of coagulation necrosis volume, prostate size, and edema.
Conclusion:
MRI appears to be a reliable method to monitor LITT effects in patients with BPH.
Insights
Magnetic Resonance Imaging (MRI) effectively monitors laser-induced thermal therapy (LITT) for benign prostatic hyperplasia (BPH). Post-treatment MRI reveals coagulation necrosis and edema, assessing treatment efficacy and patient recovery.
Area of Science:
- Urology
- Radiology
- Medical Imaging
Background:
- Benign prostatic hyperplasia (BPH) is a common condition in aging men.
- Laser-induced thermal therapy (LITT) is a minimally invasive treatment for BPH.
- Monitoring treatment effects is crucial for patient management.
Purpose of the Study:
- To evaluate the utility of Magnetic Resonance Imaging (MRI) in assessing the effects of LITT for BPH.
- To characterize MRI findings related to coagulation necrosis and edema following LITT.
Main Methods:
- MRI scans were performed on 18 BPH patients 24-48 hours before and after LITT.
- T2-weighted sagittal and axial images were analyzed for coagulation necrosis and intra/extraprostatic edema.
- Follow-up MRI was conducted in five patients 2 weeks to 6 months post-LITT.
Main Results:
- Coagulation areas appeared as hypointense cores with hyperintense rims on MRI.
- Intraprostatic edema caused significant prostate volume increases (18-108%).
- Periprostatic edema varied in severity, with resolution observed in follow-up scans.
Conclusions:
- MRI is a reliable tool for monitoring LITT outcomes in BPH patients.
- MRI findings correlate with treatment-induced changes and recovery.
- This imaging modality aids in evaluating the effectiveness of LITT for BPH.