Percutaneous cryoablation of renal masses under CT fluoroscopy: radiation doses to the patient and interventionalist

Abstract

The radiation risk to the patient during CT fluoroscopy-guided percutaneous renal mass cryoablation is, as expected, related to procedure complexity. Quantification of patient organ radiation dose was estimated using an anthropomorphic model. This information, along with the associated relative risk of malignancy, may assist in evaluating risks of the procedure, particularly in younger patients. The radiation dose to the interventionist is low regardless of procedure complexity, but highlights the importance of lead shielding.

Percutaneous cryoablation for renal cell carcinoma using ultrasound-guided targeting and computed tomography-guided ice-ball monitoring: radiation dose and short-term outcomes

“…However, it cannot be used with MR-incompatible equipment for cryoablation. When RCC is not accessible under US guidance and only MR-incompatible cryoablation equipment is available, CT fluoroscopy can be alternatively applied for the lesion targeting with low radiation exposure to patients and operators (28).…”

Radiation Exposure of Interventional Radiologists During Computed Tomography Fluoroscopy-Guided Renal Cryoablation and Lung Radiofrequency Ablation: Direct Measurement in a Clinical Setting

“…Several authors recently reported a considerably high patient effective dose during CT-guided renal cryoablation [9][10][11]. However, only an estimated dose from a phantom measurement reported by Stewart et al is available as a reference for the operator exposure; the estimated operator radiation dose was 0.0503 mGy/min during CT fluoroscopy-guided renal cryoablation [12]. The authors indicated that the estimated dose needs to be interpreted with the understanding that the operators move in a scatter field that is nonuniform in space and time during the procedures [12].…”

“…However, only an estimated dose from a phantom measurement reported by Stewart et al is available as a reference for the operator exposure; the estimated operator radiation dose was 0.0503 mGy/min during CT fluoroscopy-guided renal cryoablation [12]. The authors indicated that the estimated dose needs to be interpreted with the understanding that the operators move in a scatter field that is nonuniform in space and time during the procedures [12]. In this regard, a direct measurement of the dose during the procedure should be more reliable in determining actual operator radiation exposure.…”

Radiation Exposure of Interventional Radiologists during Computed Tomography Fluoroscopy-Guided Percutaneous Cryoablation

“…Although there are reports of high radiation exposure of interventional radiologists (interventionalists), when CT fluoroscopy guidance is used [7][8][9][10] , they specifically refer to CT-guided biopsy or drainage procedures. To our knowledge, there are only two articles investigating radiation exposure of interventionalists due to CT fluoroscopy-guided PCA [11][12] . Stewart et al reported that the estimated interventionalists' radiation exposure was 0.0503 mGy/min during CT fluoroscopy-guided renal PCA [11].…”

“…To our knowledge, there are only two articles investigating radiation exposure of interventionalists due to CT fluoroscopy-guided PCA [11][12] . Stewart et al reported that the estimated interventionalists' radiation exposure was 0.0503 mGy/min during CT fluoroscopy-guided renal PCA [11]. Matsui et al compared the direct interventionalists' radiation dose between CT fluoroscopy-guided renal PCA and lung RFA measured by electric dosimeters (for the effective dose) and thermoluminescent dosimeter rings (for the equivalent dose on the finger skin) [12].…”