Lin Sheng1, Jialiang Li, Jibing Chen, Ping Liang, Baowei Dong. 1. Department of Interventional Ultrasound, Yuquan Hosiptal, Tsinghua University, No. 5 of Shijingshan Road, Shijingshan District, Beijing, 100049, China, jlslsyyx@163.com.
Abstract
PURPOSE: Microwave ablation is used for the treatment of hypersplenism. Image guidance and ablation volume assessment is important to ensure that the ablation is successful. The accuracy of 3D ultrasound (US) and magnetic resonance imaging (MRI) in determining the parameters for microwave ablation were compared in a canine splenomegaly model. METHODS: Microwave ablation of the spleen was performed on 13 dogs with congestive splenomegaly. Several combinations of power output and ablation time were used: 60 W for 300 s, 50 W for 360 s and 40 W for 450 s. The ablation zone volume was measured by 3D US and 3D MRI immediately after microwave ablation, and at 1, 2 and 8 weeks thereafter. RESULTS: Compared with 3D MRI, the ablation zone reconstruction rate was lower with 3D US (92 vs. 100%). However, there was no significant difference was found in the ablation volume calculated soon after the treatment and 1 week and 2 months later. CONCLUSION: 3D US may be useful for quantifying the volume of microwave ablation zones in the spleens of experimental animals and appears promising as an alterative modality to MRI for clinical examinations.
PURPOSE: Microwave ablation is used for the treatment of hypersplenism. Image guidance and ablation volume assessment is important to ensure that the ablation is successful. The accuracy of 3D ultrasound (US) and magnetic resonance imaging (MRI) in determining the parameters for microwave ablation were compared in a caninesplenomegaly model. METHODS: Microwave ablation of the spleen was performed on 13 dogs with congestive splenomegaly. Several combinations of power output and ablation time were used: 60 W for 300 s, 50 W for 360 s and 40 W for 450 s. The ablation zone volume was measured by 3D US and 3D MRI immediately after microwave ablation, and at 1, 2 and 8 weeks thereafter. RESULTS: Compared with 3D MRI, the ablation zone reconstruction rate was lower with 3D US (92 vs. 100%). However, there was no significant difference was found in the ablation volume calculated soon after the treatment and 1 week and 2 months later. CONCLUSION: 3D US may be useful for quantifying the volume of microwave ablation zones in the spleens of experimental animals and appears promising as an alterative modality to MRI for clinical examinations.
Authors: Ryan T Groeschl; Charles H C Pilgrim; Erin M Hanna; Kerri A Simo; Ryan Z Swan; David Sindram; John B Martinie; David A Iannitti; Mark Bloomston; Carl Schmidt; Hooman Khabiri; Lawrence A Shirley; Robert C G Martin; Susan Tsai; Kiran K Turaga; Kathleen K Christians; William S Rilling; T Clark Gamblin Journal: Ann Surg Date: 2014-06 Impact factor: 12.969
Authors: Max Siekmann; Thomas Lothes; Ralph König; Christian Rainer Wirtz; Jan Coburger Journal: Int J Comput Assist Radiol Surg Date: 2018-01-24 Impact factor: 2.924