BACKGROUND: Thermal ablation is an accepted therapy for selected hepatic malignancies. However, the reliability of thermal ablation is limited by the inability to accurately monitor and confirm completeness of tumour destruction in real time. We investigated the ability of ultrasound elasticity imaging (USEI) to monitor thermal ablation. OBJECTIVES: Capitalizing on the known increased stiffness that occurs with protein denaturation and dehydration during thermal therapy, we sought to investigate the feasibility and accuracy of USEI for monitoring of liver tumour ablation. METHODS: A model for hepatic tumours was developed and elasticity images of liver ablation were acquired in in vivo animal studies, comparing the elasticity images to gross specimens. A clinical pilot study was conducted using USEI in nine patients undergoing open radiofrequency ablation for hepatic malignancies. The size and shape of thermal lesions on USEI were compared to B-mode ultrasound and post-ablation computed tomography (CT). RESULTS: In both in vivo animal studies and in the clinical trial, the boundary of thermal lesions was significantly more conspicuous on USEI when compared with B-mode imaging. Animal studies demonstrated good correlation between the diameter of ablated lesions on USEI and the gross specimen (r = 0.81). Moreover, high-quality strain images were generated in real time during therapy. In patients undergoing tumour ablation, a good size correlation was observed between USEI and post-operative CT (r = 0.80). CONCLUSION: USEI can be a valuable tool for the accurate monitoring and real-time verification of successful thermal ablation of liver tumours.
BACKGROUND: Thermal ablation is an accepted therapy for selected hepatic malignancies. However, the reliability of thermal ablation is limited by the inability to accurately monitor and confirm completeness of tumour destruction in real time. We investigated the ability of ultrasound elasticity imaging (USEI) to monitor thermal ablation. OBJECTIVES: Capitalizing on the known increased stiffness that occurs with protein denaturation and dehydration during thermal therapy, we sought to investigate the feasibility and accuracy of USEI for monitoring of liver tumour ablation. METHODS: A model for hepatic tumours was developed and elasticity images of liver ablation were acquired in in vivo animal studies, comparing the elasticity images to gross specimens. A clinical pilot study was conducted using USEI in nine patients undergoing open radiofrequency ablation for hepatic malignancies. The size and shape of thermal lesions on USEI were compared to B-mode ultrasound and post-ablation computed tomography (CT). RESULTS: In both in vivo animal studies and in the clinical trial, the boundary of thermal lesions was significantly more conspicuous on USEI when compared with B-mode imaging. Animal studies demonstrated good correlation between the diameter of ablated lesions on USEI and the gross specimen (r = 0.81). Moreover, high-quality strain images were generated in real time during therapy. In patients undergoing tumour ablation, a good size correlation was observed between USEI and post-operative CT (r = 0.80). CONCLUSION: USEI can be a valuable tool for the accurate monitoring and real-time verification of successful thermal ablation of liver tumours.
Authors: John R Leyendecker; Gerald D Dodd; Glenn A Halff; Victor A McCoy; Dacia H Napier; Linda G Hubbard; Kedar N Chintapalli; Shailendra Chopra; W Kenneth Washburn; Robert M Esterl; Francisco G Cigarroa; Ruth E Kohlmeier; Francis E Sharkey Journal: AJR Am J Roentgenol Date: 2002-05 Impact factor: 3.959
Authors: Xiao W Bo; Xiao L Li; Hui X Xu; Le H Guo; Dan D Li; Bo J Liu; Dan Wang; Ya P He; Xiao H Xu Journal: Br J Radiol Date: 2016 Impact factor: 3.039
Authors: Bruno C Odisio; Suguru Yamashita; Livia Frota; Steven Y Huang; Scott E Kopetz; Kamran Ahrar; Yun Shin Chun; Thomas A Aloia; Marshall E Hicks; Sanjay Gupta; Jean-Nicolas Vauthey Journal: J Gastrointest Surg Date: 2016-11-23 Impact factor: 3.452
Authors: Wenjun Yang; Tomy Varghese; Timothy Ziemlewicz; Marci Alexander; Meghan Lubner; James Louis Hinshaw; Shane Wells; Fred T Lee Journal: Ultrasound Med Biol Date: 2017-06-05 Impact factor: 2.998
Authors: Ryan T Groeschl; Ray K Wong; Edward J Quebbeman; Susan Tsai; Kiran K Turaga; Sam G Pappas; Kathleen K Christians; Eric J Hohenwalter; Sean M Tutton; William S Rilling; T Clark Gamblin Journal: HPB (Oxford) Date: 2012-10-11 Impact factor: 3.647
Authors: Clemens C Cyran; Philipp M Paprottka; Michel Eisenblätter; Dirk A Clevert; Carsten Rist; Konstantin Nikolaou; Kirsten Lauber; Frederik Wenz; Daniel Hausmann; Maximilian F Reiser; Claus Belka; Maximilian Niyazi Journal: Radiat Oncol Date: 2014-01-03 Impact factor: 3.481