Radiation Exposure During Percutaneous Ablation of Small Renal Masses: A Multi-Institutional Multimodality Analysis

To understand the effective radiation dose during percutaneous cryoablation (CA) and radiofrequency ablation (RFA) and characterize variables that may affect the individual dose. The effective radiation dose was determined by conversion of the dose-length product from CT scans performed during percu...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of endourology Vol. 29; no. 11; p. 1314
Main Authors:	Tracy, Chad Robert, Kogan, Paul, Gupta, Amit, Gahan, Jeffrey C, Theckumparampil, Nithin P J, Elsamra, Sammy E, Okunov, Zhamshid, Sun, Shiliang, Lall, Chandana, Lobko, Igor, Landman, Jaime, Cadeddu, Jeffrey A, Kavoussi, Louis R
Format:	Journal Article
Language:	English
Published:	United States 01-11-2015
Subjects:	Aged Aged, 80 and over Body Mass Index Carcinoma, Renal Cell - pathology Carcinoma, Renal Cell - surgery Catheter Ablation - methods Cryosurgery - methods Female Humans Kidney Neoplasms - pathology Kidney Neoplasms - surgery Male Middle Aged Radiation Exposure Retrospective Studies Surgery, Computer-Assisted - adverse effects Surgery, Computer-Assisted - methods Tomography, X-Ray Computed - adverse effects Tomography, X-Ray Computed - methods Tumor Burden
Online Access:	Get more information
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	To understand the effective radiation dose during percutaneous cryoablation (CA) and radiofrequency ablation (RFA) and characterize variables that may affect the individual dose. The effective radiation dose was determined by conversion of the dose-length product from CT scans performed during percutaneous CA or RFA for patients with solitary renal masses (<4 cm) at four academic centers. Radiation dose per case was compared between patients and institutions using multivariate and univariate analysis. Lifetime attributable risk of cancer was calculated for each institution and utilized to determine the number needed to harm for a range of ages at the time of exposure. One hundred twenty-three patients met the inclusion criteria with a mean age of 71 years. Sixty-nine percent of patients were male, mean body-mass index (BMI) was 29.4, and mean tumor size was 2.2 cm. The mean effective radiation dose per ablation was 40 mSv (range 3.7-147). On multivariate analysis, only BMI and institution were associated with the radiation dose. No significant difference in radiation exposure was seen for RFA or CA procedures. Radiation exposure during percutaneous ablation is similar to a multiphase CT scan. However, there is wide variability in individual treatment exposure, varying from 3.7 to 147 mSv, depending primarily on institution and BMI. Standardization of protocols is required to achieve as low as reasonably achievable levels of radiation.
ISSN:	1557-900X
DOI:	10.1089/end.2015.0314