[Stereotactic Radiofrequency Ablation (SRFA) of intrahepatic cholangiocellular carcinomas: a minimal invasive alternative to liver resection].

Up to now resection and liver transplantation are concerned as the only curative treatment options for intrahepatic cholangiocellular carcinomas (ICCs). For patients with inoperable ICCs systemic chemotherapy and various locoregional therapies including transarterial (chemo)embolization (TACE), selective internal radiation therapy (SIRT), radiofrequency ablation (RFA) and microwave ablation (MWA) are applied. Stereotactic RFA (SRFA) allows for precise 3D planning and positioning of multiple RF electrodes.

Multipolar radiofrequency ablation using 4-6 applicators simultaneously: a study in the ex vivo bovine liver.

In this study the volume and shape of coagulation zones after multipolar radiofrequency ablation (RFA) with simultaneous use of 4-6 applicators in the ex vivo bovine liver were investigated. The RF-applicators were positioned in 13 different configurations to simulate ablation of large solitary tumors and simultaneous ablation of multiple lesions with 120 kJ of applied energy/session. In total, 110 coagulation zones were induced.

Percutaneous stereotactic radiofrequency ablation of colorectal liver metastases.

Objectives: To evaluate the outcome of patients with colorectal liver metastasis (CRLM) treated with stereotactic radiofrequency ablation (SRFA).

Methods: Following IRB approval, a retrospective evaluation of 98 SRFA treatment sessions of 189 CRLMs in 63 consecutive patients was performed. Local recurrence rate (LR), overall survival (OS) and disease-free survival (DFS) were analysed.

Stereotactic radiofrequency ablation of unresectable intrahepatic cholangiocarcinomas: a retrospective study.

Purpose: To evaluate treatment effects, complications, and outcome of percutaneous stereotactic radiofrequency ablation (SRFA) of intrahepatic cholangiocarcinoma (ICC).

Patients And Methods: Eleven consecutive patients (nine men and two women) with a total of 36 inoperable ICCs (18 initial lesions, 16 lesions newly detected during follow-up, and two local recurrences) underwent SRFA between December 2004 and June 2010. Two different radiofrequency ablation (RFA) devices with internally cooled electrodes were used.

Stereotactic radiofrequency ablation (SRFA) of liver lesions: technique effectiveness, safety, and interoperator performance.

Purpose: To evaluate technique effectiveness, safety, and interoperator performance of stereotactic radiofrequency ablation (SRFA) of liver lesions.

Methods: Retrospective review including 90 consecutive patients from January 2008 to January 2010 with 106 computed tomography-guided SRFA sessions using both single and multiple electrodes for the treatment of 177 lesions: 72 hepatocellular carcinoma (HCC) and 105 metastases with a mean size of 2.9 cm (range 0.

Targeting accuracy of CT-guided stereotaxy for radiofrequency ablation of liver tumours.

The targeting accuracy during CT-guided stereotactic radiofrequency ablation (SRFA) of liver tumours was evaluated in a clinical study. Patients under general anaesthesia were immobilized using a vacuum cushion and respiratory motion control was based on temporary disconnections of the endotracheal tube. An optical-based navigation system was used for 3D trajectory planning and needle placement via a stereotactic aiming device.

Stereotactic radiofrequency ablation.

Purpose: To describe the technique of percutaneous stereotactic radiofrequency ablation (SRFA) and its application in a patient with an unresectable multifocal intrahepatic cholangiocarcinoma (ICC).

Materials And Methods: A 72-year-old man presented with two nodules of an ICC with a maximum diameter of 10 and 4 cm, respectively. To produce overlapping ablation areas and cover the entire tumor volume, 18 paths for the placement of radiofrequency ablation (RFA) probes at multiple locations were planned on 2D and 3D reconstructions of the computed tomographic (CT) data.

Respiratory motion control for stereotactic and robotic liver interventions.

Background: Control of respiratory motion is an essential prerequisite for stereotactic computer-assisted and robotic interventions in the liver.

Methods: The respiratory motion control error (RMCE) of temporary disconnections of the endotracheal tube (ETT) in anaesthetized patients has been evaluated during computer tomography (CT)-guided liver punctures. Two arterial and portal phase contrast-enhanced planning CTs were obtained during one ETT disconnection.