KÜRESEL ŞEKİLLİ KARACİĞER TÜMÖRLERİ İÇİN RADYOFREKANS ABLASYONU

Öz

Bu çalışmanın amacı radyofrekans ablasyon metodunu kullanarak küresel şekilli karaciğer tümörlerinin yok edilmesidir. Üç boyutlu sonlu elemanlar metodu kullanılmıştır. Karaciğer dokusu için beş farklı radyofrekans prop küresel şekilli lezyonu oluşturmak için kullanılmıştır. İncelenen parametreler elektrik voltajı, ablasyon süresi, geometri ve elektrot sayısıdır. Sonuçlar lezyon hacmi ve sıcaklık dağılımı olarak verilmiştir. Sonuçlar literatür sonuçları ile kıyaslanmış ve sonuçların literatür sonuçları ile uyum içinde olduğu görülmüştür. Sonuçlar bir küresel şekilli karaciğer tümörünün dört elektrotlu yılbaşı ağacı tipi ve dört elektrotlu şemsiye-tipi elektrotlardan oluşan hibrit bir elektrot konstrüksiyonuyla yok edilebileceğini göstermiştir. Yaklaşık 20 mm çapındaki bir lezyonun sekiz dakika sonunda hibrit elektrot dizaynı ile yok edilebildiği görülmüştür. Hibrit elektrot konfigürasyonunun klinik uygulamalarda küresel şekilli karaciğer tümörlerinin tedavisi için kullanılması umulmaktadır.

Anahtar Kelimeler

• Elektrot
• Karaciğer tümörleri
• Lezyon
• Radyofrekans ablasyonu

RADIOFREQUENCY ABLATION FOR SPHERICALLY-SHAPED HEPATIC TUMORS

Öz

The purpose of this study is to destroy spherical shape hepatic tumors using radiofrequency ablation method. Three-dimensional finite elements method has been employed. Five different radiofrequency probes for liver tissue have been used to create a spherical-shaped lesion. Investigated parameters are the electrical voltage, ablation time, geometry and number of electrodes. Results have been given as lesion volume and temperature distribution. Results have been compared with the literature results, and it is seen that present results are in good agreement with the literature results. Results show that a spherical shape hepatic tumor can be destroyed using a hybrid electrode construction consisting of four Christmas-tree and four umbrella-shaped electrodes. It is seen that approximately 20 mm-diameter of lesion can be destroyed using hybrid electrode design after eight minutes. It is hoped that hybrid electrode configuration can be used for treatment of spherical shape hepatic tumors in clinical applications.

Anahtar Kelimeler

• Electrode
• Hepatic tumors
• Lesion
• Radiofrequency ablation

Kaynakça

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