Characterization of microwave generator energy and ablation volumes following transarterial embolization in an in vivo porcine liver model

• Verfasst von: Sparks, Hiro [VerfasserIn]
• Verfasst von: Rink, Johann [VerfasserIn]
• Verfasst von: Ramakrishnan, Abinaya [VerfasserIn]
• Verfasst von: Sung, Kyunghun [VerfasserIn]
• Verfasst von: Ni, Jason [VerfasserIn]
• Verfasst von: Lu, David S. K. [VerfasserIn]
• Verfasst von: Raman, Steven S. [VerfasserIn]
• Verfasst von: Lee, Edward W. [VerfasserIn]
• Verfasst von: Chiang, Jason [VerfasserIn]
• Titel: Characterization of microwave generator energy and ablation volumes following transarterial embolization in an in vivo porcine liver model
• Verf.angabe: Hiro Sparks, MD, Johann S. Rink, MD, Abinaya Ramakrishnan, BS, Kyunghun Sung, PhD, Jason Ni, MD, David S.K. Lu, MD, Steven S. Raman, MD, Edward W. Lee, MD, PhD, and Jason Chiang, MD, PhD
• E-Jahr: 2024
• Jahr: August 2024
• Umfang: 7 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 14.01.2025
• Titel Quelle: Enthalten in: Journal of vascular and interventional radiology
• Ort Quelle: Amsterdam [u.a.] : Elsevier, 1990
• Jahr Quelle: 2024
• Band/Heft Quelle: 35(2024), 8 vom: Aug., Seite 1227-1233
• ISSN Quelle: 1535-7732
• DOI: doi:10.1016/j.jvir.2024.05.005
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1914589017

Abstract

Purpose - To characterize the relationship between ablation zone volume (AZV) and microwave ablation (MWA) energy in an in vivo porcine liver model following arterial embolization. - Materials and Methods - With Institutional Animal Care and Use Committee (IACUC) approval, 11 female swine underwent either right (n = 5) or left (n = 6) hepatic artery embolization under fluoroscopic guidance. Subsequently, ultrasound (US)-guided MWA was performed in each liver segment (left lateral, left medial, right medial, and right lateral) at either 30 W (n = 4 lobes), 60 W (n = 4), 65 W (n = 20), 90 W (n = 8), 120 W (n = 4), or 140 W (n = 4) continuously for 5 minutes. Postprocedural volumetric segmentation was performed on standardized multiphase T1 magnetic resonance (MR) imaging sequences. - Results - Mean AZVs in embolized lobes (15.8 mL ± SD 10.6) were significantly larger than those in nonembolized lobes (11.2 mL ± SD 6.5, P < .01). MWA energy demonstrated significant positive linear correlation with both embolized (R2 = 0.66, P < .01) and nonembolized (R2 = 0.64, P < .01) lobes. The slope of the linear models corresponded to a 0.95 mL/kJ (SD ± 0.16) and 0.54 mL/kJ (SD ± 0.09) increase in ablation volume per applied kilojoule of energy (E) in embolized and nonembolized lobes, respectively. In the multivariate model, embolization status significantly modified the relationship between E and AZV as described by the following interaction term: 0.42∗E∗(embolization status) (P = .031). - Conclusions - Linear models demonstrated a near 1.8-fold increase in ratio of AZV per unit E, R(AZV:E), when applied to embolized lobes relative to nonembolized lobes. Absolute AZV differences between embolized and nonembolized lobes were greater at higher-power MWA.