Computed tomography (CT) fluoroscopy is able to give real time images to a physician undertaking minimally invasive procedures such as biopsies, percutaneous drainage, and radio frequency ablation (RFA). Both operators executing the procedure and patients too, are thus at risk of radiation exposure during a CT fluoroscopy.This study focuses on the radiation exposure present during a series of r...

An 84-year-old man was diagnosed with a solid renal mass and he refused open surgery. Computerized tomography (CT) demonstrated mass enhancement with iodinated contrast material, consistent with solid renal cell carcinoma (fig. 1). Three years later the mass had enlarged to 3.5 cm. The patient continued to refuse surgery but he consented to per­ cutaneous radio frequency ablation. Institutional...

Strain evaluation is of major interest in clinical cardiology as it can quantify the cardiac function. Myocardial elastography, a radio-frequency (RF)-based cross-correlation method, has been developed to evaluate the local strain distribution in the heart in vivo. However, inhomogeneities such as RF ablation lesions or infarction require a three-dimensional approach to be measured accurately. ...

Radio Frequency (RF) ablation has become of considerable interest as a minimally invasive treatment for primary and metastatic liver tumors. Major limitations are small lesion size, which make multiple applications necessary and incomplete killing of tumor cells, resulting in high recurrence rates. RF ablation is typically carried out in the frequency range of around 500 kHz. Measurements have ...

We thank the authors for this article [1]. We noticed that two of our cases developed arterioatrial fistulae after resection of the myxoma while we were investigating our cases [2,3]. Your excellent image demonstrated that this myxoma tissue possessed three arterial branches. Demonstration of these nutrient arteries suggested that, in any case, even though the nutrient arteries of the myxoma co...

Radiofrequency tumor ablation requires precise localization of the carcinoma. In a first step, a procedure for computer-assisted puncture guiding has been assessed. Intraoperative tracking of liver movements is not easy, since the structure not only moves during intervention, but also deforms. Therefore, a 3D biomechanical model has been developed to quantify liver deformations under various co...

2014 Pulmonary vein (PV) isolation is the cornerstone of ablation therapy for atrial fibrillation. The majority of procedures are still performed using radiofrequency (RF) energy and a point-by-point ablation approach. Novel ‘single shot’ ablation tools with the aim of creating a circumferential lesion around the PVs with a single or a limited number of energy applications emerge. The currently...

PURPOSE This paper is the first report on the monitoring of tissue ablation using ultrasound RF echo time series. METHODS We calcuate frequency and time domain features of time series of RF echoes from stationary tissue and transducer, and correlate them with ablated and non-ablated tissue properties. RESULTS We combine these features in a nonlinear classification framework and demonstrate ...

This paper reports the clinical experience of a multi-center, multiple physician trial with a novel fractional radiofrequency ablative skin resurfacing and rejuvenation device (Fractora, Invasix, Israel) deployed on both Caucasian skin types I III and Asian skin type IV. Histological study demonstrated deep ablation and collagen restructuring in the papillary and reticular dermis. The Fractora ...

Background Cardiac RF ablation is a widely accepted procedure for treatment of ventricular tachycardia and atrial fibrillation. Late gadolinium enhanced MRI (LGE-MRI) can be used to assess RF ablation lesions. However, LGE-MRI requires contrast injection and the visibility of lesions and appearance considerably change with time after the injection. Recently, native (non-contrast) T1-weighted (T...