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Summation of CT Scans During Radiofrequency Ablation for Assessing Target Lesion Coverage

Pamela M. Mazurek1, Anne M. Silas2 and John M. Gemery2

1 Department of Radiology, CT Scan Division, Dartmouth-Hitchcock Medical Center, Lebanon, NH.
2 Department of Radiology, Division of Vascular and Interventional Radiology, Dartmouth-Hitchcock Medical Center, One Medical Center Dr., Lebanon, NH 03756.


Figure 1
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  		Fig. 1A —Summated images from radiofrequency ablation procedures show multiple individual probe placements as single images. Summated CT images show liver lesion ablations in 55-year-old woman with metastatic leiomyosarcoma (A), 70-year-old man with metastatic colon cancer (B), and 60-year-old man with hepatocellular carcinoma (C).

 

Figure 2
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  		Fig. 1B —Summated images from radiofrequency ablation procedures show multiple individual probe placements as single images. Summated CT images show liver lesion ablations in 55-year-old woman with metastatic leiomyosarcoma (A), 70-year-old man with metastatic colon cancer (B), and 60-year-old man with hepatocellular carcinoma (C).

 

Figure 3
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  		Fig. 1C —Summated images from radiofrequency ablation procedures show multiple individual probe placements as single images. Summated CT images show liver lesion ablations in 55-year-old woman with metastatic leiomyosarcoma (A), 70-year-old man with metastatic colon cancer (B), and 60-year-old man with hepatocellular carcinoma (C).

 

Figure 4
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  		Fig. 1D —Summated images from radiofrequency ablation procedures show multiple individual probe placements as single images. Summated CT image shows renal ablation in 83-year-old man with renal cell carinoma.

 

Figure 5
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  		Fig. 1E —Summated images from radiofrequency ablation procedures show multiple individual probe placements as single images. Summated image from three series in 55-year-old man with hepatocellular carcinoma shows early arterial phase showing transient enhancement of target lesion, initial probe placement, and later probe placement.

 

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