BJR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
British Journal of Radiology (2006) 79, 562-571
© 2006 British Institute of Radiology
doi: 10.1259/bjr/51844219
This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Lee, J M
Right arrow Articles by Choi, B I
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Lee, J M
Right arrow Articles by Choi, B I

Radiofrequency ablation in pig lungs: in vivo comparison of internally cooled, perfusion and multitined expandable electrodes

J M Lee, MD 1,2 J K Han, MD 1,2 J M Chang, MD 1,2 S Y Chung, MD 1,2 S H Kim, MD 1,2 J Y Lee, MD 1,2 and B I Choi, MD 1,2

1 Department of Radiology, and Institute of Radiation Medicine, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-744, 2 Clinical Research Institute, Seoul National University Hospital, Seoul, Korea


Figure 1
View larger version (74K):

[in a new window]
  		Figure 1. Different electrodes used for monopolar radiofrequency ablation.(a) ValleylabTM internally cooled electrode with a 30 mm long exposed tip (Cool-tip). (b) Berchtold® perfusion electrode with a 15 mm long exposed tip and side holes. (c) RITA® multitined expandable electrode (Starburst XL) with nine curved tines.

 

Figure 2
View larger version (49K):

[in a new window]
  		Figure 2. Graphic depiction of the electrical parameters during radiofrequency ablation.(a) Tissue impedance (lower row), radiofrequency (RF) current (middle row), and power changes (upper row) during radiofrequency ablation using an internally cooled electrode. (b) Power and impedance changes (lower row), and tissue temperature changes (upper row) during radiofrequency ablation using the multitined expandable electrode.

 

Figure 3
View larger version (89K):

[in a new window]
  		Figure 3. Contrast-enhanced CT scans and photographs of lung treated by radiofrequency (RF) ablation using an internally cooled electrode and a multitined expandable electrode in a pig model. (a) Contrast-enhanced axial CT scan obtained immediately after RF ablation showing an RF-induced hyperattenuated region (arrows) in both lungs. Note that the hyperattenuated region in the right lung treated with an internally cooled electrode is similar to that in left lung treated with a multitined expandable electrode. Photographs of gross specimen containing RF-induced coagulation areas created with (b) an internally cooled electrode and (c) a multitined expandable electrode. Ablated tissues appeared as a central, firm, dark-brown area (asterisk) surrounded by an outer, irregular margin (arrows) of bright red tissue. (d) Contrast-enhanced coronal reconstruction image obtained immediately after RF ablation using a perfusion electrode showing RF-induced hyperattenuated regions in the left lung (arrows). Note that the hyperattenuated region in the left lung treated with a perfusion electrode is larger than those produced using an internally cooled electrode (arrowheads) in the right lung. (e) Photographs of a gross specimen containing an RF-induced coagulation area created with a perfusion electrode. Note that the short- and long-axis diameters of the coagulation area were larger in Group B using a perfusion electrode than in the other Groups (a and c).

 




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING  ALL BIR JOURNALS 
Copyright © 2006 by the British Institute of Radiology.