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ESTUDIOS


01 octubre 2012

AMERICAN JOURNAL OF ROENTGENOLOGY. The Impact of CT Follow-Up Interval on Stages of Hepatocellular Carcinomas Detected During the Surveillance of Patients With Liver Cirrhosis

Yong Eun Chung, Myeong-Jin Kim, Mi-Suk Park, Jin-Young Choi, Joon Seok Lim, Kyung Ah Kim and Ki Whang Kim

OBJECTIVE. The purpose of our study was to assess the relationship between time intervals of CT examinations and the stages of hepatocellular carcinomas (HCCs) detected during the surveillance of patients with liver cirrhosis.

01 octubre 2012

RADIOLOGY. MR Imaging–controlled Transurethral Ultrasound Therapy for Conformal Treatment of Prostate Tissue: Initial Feasibility in Humans

Rajiv Chopra, PhD, Alexandra Colquhoun, MD, Mathieu Burtnyk, PhD, William A. N’djin, PhD, Ilya Kobelevskiy, MSc, Aaron Boyes, BSc, Kashif Siddiqui, MD, Harry Foster, MD, Linda Sugar, MD, Masoom A. Haider, MD, Michael Bronskill, PhD and Laurence Klotz, MD

Purpose: To evaluate the feasibility and safety of magnetic resonance (MR) imaging–controlled transurethral ultrasound therapy for prostate cancer in humans.

01 octubre 2012

AMERICAN JOURNAL OF ROENTGENOLOGY. Ultrasound-Guided Optical Coherence Tomography Needle Probe for the Assessment of Breast Cancer Tumor Margins

Andrea Curatolo, Robert A. McLaughlin, Bryden C. Quirk, Rodney W. Kirk, Anita G. Bourke, Benjamin A. Wood, Peter D. Robbins, Christobel M. Saunders and David D. Sampson

OBJECTIVE. The purpose of this study was to evaluate a new imaging technique for the assessment of breast cancer tumor margins. The technique entails deployment of a high-resolution optical imaging needle under ultrasound guidance. Assessment was performed on fresh ex vivo tissue samples.

28 septiembre 2014

WORLD JOURNAL OF RADIOLOGY. Expectations from imaging for pre-transplant evaluation of living donor liver transplantation

Tiffany Hennedige, Gopinathan Anil and Krishnakumar Madhavan.

Living donor liver transplant (LDLT) is a major surgical undertaking. Detailed pre-operative assessment of the vascular and biliary anatomy is crucial for safe and successful harvesting of the graft and transplantation. Computed tomography (CT) and magnetic resonance imaging (MRI) are currently the imaging modalities of choice in pre-operative evaluation. These cross-sectional imaging techniques can reveal the vascular and biliary anatomy, assess the hepatic parenchyma and perform volumetric analysis. Knowledge of the broad indications and contraindications to qualify as a recipient for LDLT is essential for the radiologist reporting scans in a pre-transplant patient. Similarly, awareness of the various anatomical variations and pathological states in the donor is essential for the radiologist to generate a meaningful report of his/her observations. CT and MRI have largely replaced invasive techniques such as catheter angiography, percutaneous cholangiography and endoscopic retrograde cholangiopancreatography. In order to generate a meaningful report based on these pre-operative imaging scans, it is also mandatory for the radiologist to be aware of the surgeon’s perspective. We intend to provide a brief overview of the common surgical concepts of LDLT and give a detailed description of the minimum that a radiologist is expected to seek and report in CT and MR scans performed for LDLT related evaluation.

01 julio 2013

CIRCULATION. Ambulatory Blood Pressure Changes After Renal Sympathetic Denervation in Patients With Resistant Hypertension

Felix Mahfoud, MD; Christian Ukena, MD; Roland E. Schmieder, MD; Bodo Cremers, MD; Lars C. Rump, MD; Oliver Vonend, MD; Joachim Weil, MD; Martin Schmidt, MD; Uta C. Hoppe, MD; Thomas Zeller, MD; Axel Bauer, MD; Christian Ott, MD; Erwin Blessing, MD; Paul A. Sobotka, MD; Henry Krum, MBBS, PhD; Markus Schlaich, MD; Murray Esler, MBBS, PhD, FRACP; Michael Böhm, MD

Background—Catheter-based renal sympathetic denervation (RDN) reduces office blood pressure (BP) in patients with resistant hypertension according to office BP. Less is known about the effect of RDN on 24-hour BP measured by ambulatory BP monitoring and correlates of response in individuals with true or pseudoresistant hypertension.

07 septiembre 2013

WORLD JOURNAL OF GASTROENTEROLOGY. Practice guidelines for ultrasound-guided percutaneous microwave ablation for hepatic malignancy

Ping Liang, Jie Yu, Ming-De Lu, Bao-Wei Dong, Xiao-Ling Yu, Xiao-Dong Zhou, Bing Hu, Ming-Xing Xie, Wen Cheng, Wen He, Jian-Wen Jia and Guo-Rong Lu.

Primary liver cancer and liver metastases are among the most frequent malignancies worldwide, with an increasing number of new cases and deaths every year. Traditional surgery is only suitable for a limited proportion of patients and imaging-guided percutaneous thermal ablation has achieved optimistic results for management of hepatic malignancy. This synopsis outlines the first clinical practice guidelines for ultrasound-guided percutaneous microwave ablation therapy for hepatic malignancy, which was created by a joint task force of the Society of Chinese Interventional Ultrasound. The guidelines aim at standardizing the microwave ablation procedure and therapeutic efficacy assessment, as well as proposing the criteria for the treatment candidates.

14 julio 2013

WORLD JOURNAL OF GASTROENTEROLOGY. Systematic review of surgical resection vs radiofrequency ablation for hepatocellular carcinoma

Alessandro Cucchetti, Fabio Piscaglia, Matteo Cescon, Giorgio Ercolani and Antonio Daniele Pinna.

Hepatocellular carcinoma (HCC) represents one of the most common neoplasms worldwide. Surgical resection and local ablative therapies represent the most frequent first lines therapies adopted when liver transplantation can not be offered or is not immediately accessible. Hepatic resection (HR) is currently considered the most curative strategy, but in the last decade local ablative therapies have started to obtain satisfactory results in term of efficacy and, of them, radiofrequency ablation (RFA) is considered the reference standard. An extensive literature review, from the year 2000, was performed, focusing on results coming from studies that directly compared HR and RFA. Qualities of the studies, characteristics of patients included, and patient survival and recurrence rates were analyzed. Except for three randomized controlled trials (RCT), most studies are affected by uncertain methodological approaches since surgical and ablated patients represent different populations as regards clinical and tumor features that are known to affect prognosis. Unfortunately, even the available RCTs report conflicting results. Until further evidences become available, it seems reasonable to offer RFA to very small HCC (< 2 cm) with no technical contraindications, since in this instance complete necrosis is most likely to be achieved. In larger nodules, namely > 2 cm and especially if > 3 cm, and/or in tumor locations in which ablation is not expected to be effective or safe, surgical removal is to be preferred.

28 julio 2013

WORLD JOURNAL OF GASTROENTEROLOGY. Survival outcome of patients with spontaneously ruptured hepatocellular carcinoma treated surgically or by transarterial embolization

Young-Joo Jin, Jin-Woo Lee, Seoung-Wook Park, Jung Il Lee, Don Haeng Lee, Young Soo Kim, Soon Gu Cho, Yong Sun Jeon, Kun Young Lee and Seung-Ik Ahn.

AIM: To evaluate clinical outcomes of patients that underwent surgery, transarterial embolization (TAE), or supportive care for spontaneously ruptured hepatocellular carcinoma (HCC).

14 agosto 2013

WORLD JOURNAL OF GASTROENTEROLOGY. Stent-grafts for the treatment of TIPS dysfunction: Fluency stent vs Wallgraft stent

Xue-Feng Luo, Ling Nie, Zhu Wang, Jiaywei Tsauo, Ling-Jun Liu, Yang Yu, Biao Zhou, Cheng-Wei Tang and Xiao Li.

AIM: To evaluate the clinical efficacy of an expanded polytetrafluoro-ethylene-covered Fluency stent compared with that of a polyethylene terephthalate-covered Wallgraft stent for the management of transjugular intrahepatic portosystemic shunt (TIPS) dysfunction.

01 septiembre 2012

JACC. A Randomized Comparison of Pulmonary Vein Isolation With Versus Without Concomitant Renal Artery Denervation in Patients With Refractory Symptomatic Atrial Fibrillation and Resistant Hypertension

Evgeny Pokushalov, MD, PhD; Alexander Romanov, MD; Giorgio Corbucci, PhD; Sergey Artyomenko, MD; Vera Baranova, MD; Alex Turov, MD; Natalya Shirokova, MD; Alexander Karaskov, MD, PhD; Suneet Mittal, MD; Jonathan S. Steinberg, MD

Objectives The aim of this prospective randomized study was to assess the impact of renal artery denervation in patients with a history of refractory atrial fibrillation (AF) and drug-resistant hypertension who were referred for pulmonary vein isolation (PVI).

01 septiembre 2012

AMERICAN JOURNAL OF ROENTGENOLOGY. Evaluation of Immature Hemodialysis Arteriovenous Fistulas Based on 3-French Retrograde Micropuncture of Brachial Artery

Yan Yan, Michael C. Soulen, Richard D. Shlansky-Goldberg, S. William Stavropoulos, Mandeep Dagli, Maxim Itkin and Scott O. Trerotola

OBJECTIVE. The objective of our study was to assess outcomes after evaluation of immature hemodialysis arteriovenous fistulas (AVFs) via 3-French brachial artery access and to identify the incidence of arterial and venous puncture site spasm.

01 septiembre 2012

AMERICAN JOURNAL OF ROENTGENOLOGY. Contrast Media–Doped Hydrodissection During Thermal Ablation: Optimizing Contrast Media Concentration for Improved Visibility on CT Images

Calista Campbell, Meghan G. Lubner, J. Louis Hinshaw, Alejandro Muñoz del Rio and Christopher L. Brace

OBJECTIVE. The purpose of this study is to determine a concentration of iodinated contrast media in saline and 5% dextrose in water (D5W) for organ hydrodissection, a technique used to physically separate and protect tissues adjacent to thermal ablations.

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