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CardioVascular and Interventional Radiology

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01-02-2016 | Clinical Investigation

Percutaneous Renal Tumor Ablation: Radiation Exposure During Cryoablation and Radiofrequency Ablation

Authors: James C. McEachen, Shuai Leng, Thomas D. Atwell, Matthew K. Tollefson, Jeremy L. Friese, Zhen Wang, M. Hassan Murad, Grant D. Schmit

Published in: CardioVascular and Interventional Radiology | Issue 2/2016

Abstract

Introduction

Once reserved solely for non-surgical cases, percutaneous ablation is becoming an increasingly popular treatment option for a wider array of patients with small renal masses and the radiation risk needs to be better defined as this transition continues.

Materials and Methods

Retrospective review of our renal tumor ablation database revealed 425 patients who underwent percutaneous ablation for treatment of 455 renal tumors over a 5-year time period. Imparted radiation dose information was reviewed for each procedure and converted to effective patient dose and skin dose using established techniques. Statistical analysis was performed with each ablative technique.

Results

For the 331 cryoablation procedures, the mean DLP was 6987 mGycm (SD = 2861) resulting in a mean effective dose of 104.7 mSv (SD = 43.5) and the mean CTDI_vol was 558 mGy (SD = 439) resulting in a mean skin dose of 563.2 mGy (SD = 344.1). For the 124 RFA procedures, the mean DLP was 3485 mGycm (SD = 1630) resulting in a mean effective dose of 50.3 mSv (SD = 24.0) and the mean CTDI_vol was 232 mGy (SD = 149) resulting in a mean skin dose of 233.2 mGy (SD = 117.4). The difference in patient radiation exposure between the two renal ablation techniques was statistically significant (p < 0.001).

Conclusion

Both cryoablation and RFA imparted an average skin dose that was well below the 2 Gy deterministic threshold for appreciable sequela. Renal tumor cryoablation resulted in a mean skin and effective radiation dose more than twice that for RFA. The radiation exposure for both renal tumor ablation techniques was at the high end of the medical imaging radiation dose spectrum.

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Title: Percutaneous Renal Tumor Ablation: Radiation Exposure During Cryoablation and Radiofrequency Ablation
Authors: James C. McEachen
Shuai Leng
Thomas D. Atwell
Matthew K. Tollefson
Jeremy L. Friese
Zhen Wang
M. Hassan Murad
Grant D. Schmit
Publication date: 01-02-2016
Publisher: Springer US
Published in: CardioVascular and Interventional Radiology / Issue 2/2016
Print ISSN: 0174-1551
Electronic ISSN: 1432-086X
DOI: https://doi.org/10.1007/s00270-015-1169-1

At a glance: The STEP trials

Springer Medicine

Percutaneous Renal Tumor Ablation: Radiation Exposure During Cryoablation and Radiofrequency Ablation

Abstract

Introduction

Materials and Methods

Results

Conclusion

At a glance: The STEP trials

Springer Medicine

Abstract

Introduction

Materials and Methods

Results

Conclusion

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