The relationship between applied energy and ablation zone volume in patients with hepatocellular carcinoma and colorectal liver metastasis View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2018-08

AUTHORS

Wouter J. Heerink, A. Millad Solouki, Rozemarijn Vliegenthart, Simeon J. S. Ruiter, Egbert Sieders, Matthijs Oudkerk, Koert P. de Jong

ABSTRACT

OBJECTIVES: To study the ratio of ablation zone volume to applied energy in computed tomography (CT)-guided radiofrequency ablation (RFA) and microwave ablation (MWA) in patients with hepatocellular carcinoma (HCC) in a cirrhotic liver and in patients with colorectal liver metastasis (CRLM). METHODS: In total, 90 liver tumors, 45 HCCs in a cirrhotic liver and 45 CRLMs were treated with RFA or with one of two MWA devices (MWA_A and MWA_B), resulting in 15 procedures for each tumor type, per device. Device settings were recorded and the applied energy was calculated. Ablation volumes were segmented on the contrast-enhanced CT scans obtained 1 week after the procedure. The ratio of ablation zone volume in milliliters to applied energy in kilojoules was determined for each procedure and compared between HCC (RHCC) and CRLM (RCRLM), stratified according to ablation device. RESULTS: With RFA, RHCC and RCRLM were 0.22 mL/kJ (0.14-0.45 mL/kJ) and 0.15 mL/kJ (0.14-0.22 mL/kJ; p = 0.110), respectively. With MWA_A, RHCC was 0.81 (0.61-1.07 mL/kJ) and RCRLM was 0.43 (0.35-0.61 mL/kJ; p = 0.001). With MWA_B, RHCC was 0.67 (0.41-0.85 mL/kJ) and RCRLM was 0.43 (0.35-0.61 mL/kJ; p = 0.040). CONCLUSIONS: With RFA, there was no significant difference in energy deposition ratio between tumor types. With both MWA devices, the ratios were higher for HCCs. Tailoring microwave ablation device protocols to tumor type might prevent incomplete ablations. KEY POINTS: • HCCs and CRLMs respond differently to microwave ablation • For MWA, CRLMs required more energy to achieve a similar ablation volume • Tailoring ablation protocols to tumor type might prevent incomplete ablations. More... »

PAGES

3228-3236

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00330-017-5266-1

DOI

http://dx.doi.org/10.1007/s00330-017-5266-1

DIMENSIONS

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PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/29536242


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40 schema:description OBJECTIVES: To study the ratio of ablation zone volume to applied energy in computed tomography (CT)-guided radiofrequency ablation (RFA) and microwave ablation (MWA) in patients with hepatocellular carcinoma (HCC) in a cirrhotic liver and in patients with colorectal liver metastasis (CRLM). METHODS: In total, 90 liver tumors, 45 HCCs in a cirrhotic liver and 45 CRLMs were treated with RFA or with one of two MWA devices (MWA_A and MWA_B), resulting in 15 procedures for each tumor type, per device. Device settings were recorded and the applied energy was calculated. Ablation volumes were segmented on the contrast-enhanced CT scans obtained 1 week after the procedure. The ratio of ablation zone volume in milliliters to applied energy in kilojoules was determined for each procedure and compared between HCC (RHCC) and CRLM (RCRLM), stratified according to ablation device. RESULTS: With RFA, RHCC and RCRLM were 0.22 mL/kJ (0.14-0.45 mL/kJ) and 0.15 mL/kJ (0.14-0.22 mL/kJ; p = 0.110), respectively. With MWA_A, RHCC was 0.81 (0.61-1.07 mL/kJ) and RCRLM was 0.43 (0.35-0.61 mL/kJ; p = 0.001). With MWA_B, RHCC was 0.67 (0.41-0.85 mL/kJ) and RCRLM was 0.43 (0.35-0.61 mL/kJ; p = 0.040). CONCLUSIONS: With RFA, there was no significant difference in energy deposition ratio between tumor types. With both MWA devices, the ratios were higher for HCCs. Tailoring microwave ablation device protocols to tumor type might prevent incomplete ablations. KEY POINTS: • HCCs and CRLMs respond differently to microwave ablation • For MWA, CRLMs required more energy to achieve a similar ablation volume • Tailoring ablation protocols to tumor type might prevent incomplete ablations.
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