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Find video protocols related to scientific articles indexed in Pubmed.
Different techniques of static/dynamic guided implant surgery: modalities and indications.
Periodontol. 2000
PUBLISHED: 08-16-2014
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For computer-guided surgery a static surgical guide is used that transfers the virtual implant position from computerized tomographic data to the surgical site. These guides are produced by computer-aided design/computer-assisted manufacture technology, such as stereolithography, or manually in a dental laboratory (using mechanical positioning devices or drilling machines). With computer-navigated surgery the position of the instruments in the surgical area is constantly displayed on a screen with a three-dimensional image of the patient. In this way, the system allows real-time transfer of the preoperative planning and visual feedback on the screen. A workflow of the different systems is presented in this review.
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Laparoscopic liver packing to protect surrounding organs during thermal ablation.
Minim Invasive Ther Allied Technol
PUBLISHED: 03-18-2014
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To evaluate the feasibility of liver packing for the prevention of injury to adjacent organs during thermal ablation of liver tumors.
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Angiographic C-arm CT- versus MDCT-guided stereotactic punctures of liver lesions: nonrigid phantom study.
AJR Am J Roentgenol
PUBLISHED: 10-24-2013
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Angiographic C-arm CT may allow performing percutaneous stereotactic tumor ablations in the interventional radiology suite. Our purpose was to evaluate the accuracy of using C-arm CT for single and multimodality image fusions and to compare the targeting accuracy of liver lesions with the reference standard of MDCT.
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Stereotactic Radiofrequency Ablation for Liver Tumors in Inherited Metabolic Disorders.
Cardiovasc Intervent Radiol
PUBLISHED: 07-11-2013
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Both glycogen storage disease type Ia (GSD Ia) and tyrosinemia type I (TYR I) are inherited metabolic disorders that can be complicated by formation of liver adenomas in juvenile/young adult age and/or development of hepatocellular carcinoma. We describe the first application of stereotactic radiofrequency ablation (SRFA) in focal lesions in three patients with inherited metabolic disorders affecting the liver.
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A retrospective comparison between 68Ga-DOTA-TOC PET/CT and 18F-DOPA PET/CT in patients with extra-adrenal paraganglioma.
Eur. J. Nucl. Med. Mol. Imaging
PUBLISHED: 05-09-2013
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(18)F-Fluoro-L-dihydroxyphenylalanine ((18)F-DOPA) PET offers high sensitivity and specificity in the imaging of nonmetastatic extra-adrenal paragangliomas (PGL) but lower sensitivity in metastatic or multifocal disease. These tumours are of neuroendocrine origin and can be detected by (68)Ga-DOTA-Tyr(3)-octreotide ((68)Ga-DOTA-TOC) PET. Therefore, we compared (68)Ga-DOTA-TOC and (18)F-DOPA as radiolabels for PET/CT imaging for the diagnosis and staging of extra-adrenal PGL. Combined cross-sectional imaging was the reference standard.
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Grading system for the selection of patients with congenital aural atresia for active middle ear implants.
Neuroradiology
PUBLISHED: 03-19-2013
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Active middle ear implants (aMEI) are being increasingly used for hearing restoration in congenital aural atresia. The existing gradings used for CT findings do not meet the requirements for these implants. Some items are expendable, whereas other important imaging factors are missing. We aimed to create a new grading system that could describe the extent of the malformation and predict the viability and challenges of implanting an aMEI.
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Gastrointestinal stromal tumors: diagnosis, therapy and follow-up care in Austria.
Wien Med Wochenschr
PUBLISHED: 01-31-2013
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Optimal treatment for patients suffering from gastrointestinal stromal tumors (GIST) is based on an interdisciplinary treatment approach. Austrian representatives of Medical and Surgical Oncology, Pathology, Radiology, Nuclear Medicine, Gastroenterology, and Laboratory Medicine issued this manuscript on a consensual base within the context of currently available and published literature. This paper contains guidelines and recommendations for diagnosis, therapy, and follow-up of GIST patients in Austria.
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[Stereotactic Radiofrequency Ablation (SRFA) of intrahepatic cholangiocellular carcinomas: a minimal invasive alternative to liver resection].
Wien Med Wochenschr
PUBLISHED: 01-15-2013
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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. Due to overlapping necroses tumors >?5 cm can be completely ablated in one session. 17 inoperable consecutive patients with 52 ICCs were treated with stereotactic RFA (SRFA). A median overall survival of 60 months was achieved. The two largest tumors with diameters >?10 cm were completely ablated. These SRFA data of irresectable ICCs are superior to the published data on resection. SRFA is a minimal invasive alternative treatment to resection and may be considered as the first-line local treatment of patients with ICCs in selected patients.
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[Radiofrequency ablation of hepatocellular carcinoma].
Wien Med Wochenschr
PUBLISHED: 01-08-2013
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Percutaneous radiofrequency ablation (RFA) is well established in the treatment of hepatocellular carcinoma (HCC). Due to its curative potential, it is the method of choice for non resectable BCLC (Barcelona Liver Clinic) 0 and A. RFA challenges surgical resection for small HCC and is the method of choice in bridging for transplantation and recurrence after resection or transplantation. The technical feasibility of RFA depends on the size and location of the HCC and the availability of ablation techniques (one needle techniques, multi-needle techniques). More recently, stereotactic multi-needle techniques with 3D trajectory planning and guided needle placement substantially improve the spectrum of treatable lesions including large volume tumors. Treatment success depends on the realization of ablations with large intentional margins of tumor free tissue (A0 ablation in analogy to R0 resection), which has to be documented by fusion of post- with pre-ablation images, and confirmed during follow-up imaging.
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Cone-beam computed tomography-guided stereotactic liver punctures: a phantom study.
Cardiovasc Intervent Radiol
PUBLISHED: 01-07-2013
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Images from computed tomography (CT), combined with navigation systems, improve the outcomes of local thermal therapies that are dependent on accurate probe placement. Although the usage of CT is desired, its availability for time-consuming radiological interventions is limited. Alternatively, three-dimensional images from C-arm cone-beam CT (CBCT) can be used. The goal of this study was to evaluate the accuracy of navigated CBCT-guided needle punctures, controlled with CT scans.
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Frameless stereotactic targeting devices: technical features, targeting errors and clinical results.
Int J Med Robot
PUBLISHED: 09-09-2011
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Brain biopsies (BB) and depth electrode placements (DEP) are increasingly performed using frameless stereotactic targeting devices. This paper is intended to provide a comprehensive review of the technical features, targeting errors and clinical results.
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Percutaneous stereotactic radiofrequency ablation of colorectal liver metastases.
Eur Radiol
PUBLISHED: 07-18-2011
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To evaluate the outcome of patients with colorectal liver metastasis (CRLM) treated with stereotactic radiofrequency ablation (SRFA).
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Do image modality and registration method influence the accuracy of craniofacial navigation?
J. Oral Maxillofac. Surg.
PUBLISHED: 07-08-2011
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Cone-beam computed tomography (CBCT) is increasingly used in craniofacial imaging and may be an interesting option for navigated surgery. The purpose of this study was to evaluate the accuracy of various registration techniques in CBCT compared with intraoperative and diagnostic multislice spiral computed tomography (MSCT).
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Stereotactic radiofrequency ablation of unresectable intrahepatic cholangiocarcinomas: a retrospective study.
Cardiovasc Intervent Radiol
PUBLISHED: 06-12-2011
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To evaluate treatment effects, complications, and outcome of percutaneous stereotactic radiofrequency ablation (SRFA) of intrahepatic cholangiocarcinoma (ICC).
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Accuracy and diagnostic yield of CT-guided stereotactic liver biopsy of primary and secondary liver tumors.
Comput. Aided Surg.
PUBLISHED: 05-25-2011
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CT-guided biopsy still plays a decisive role in the management of liver tumors, especially if the lesions are not visible or accessible by ultrasound. As CT-guided stereotaxy appears to be a very accurate targeting technique, the aim of this study was to evaluate the targeting accuracy, diagnostic yield, and complications of CT-guided stereotactic liver biopsy of primary and secondary liver tumors.
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Targeting accuracy of CT-guided stereotaxy for radiofrequency ablation of liver tumours.
Minim Invasive Ther Allied Technol
PUBLISHED: 04-06-2011
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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. A control CT with the needles in place was fused with the planning CT for accuracy evaluation. Sub-analysis was performed for "location" (liver segments II-VIII), "approach" (intercostal or transabdominal), "properties" (clear parenchymal, subcapsular, subphrenic, fat, and subphrenic plus fat), and "path length". In 20 patients with 35 liver lesions, a total of 145 needles were placed with mean (±SD) lateral errors of 3.6 ± 2.5 mm at the needle tip, angular errors of 1.3° ± 1.2°, and longitudinal errors at the needle tip of -7.4 ± 6.2 mm. No puncture-related complications were noted. No significant differences of angular errors between segments, approach and properties were recorded. Long paths correlated with smaller angular errors. CT-guided stereotaxy can be considered safe and provided precise multiple needle placement for SRFA of liver lesions at arbitrary trajectories in various segments and locations.
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Stereotactic radiofrequency ablation (SRFA) of liver lesions: technique effectiveness, safety, and interoperator performance.
Cardiovasc Intervent Radiol
PUBLISHED: 02-28-2011
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To evaluate technique effectiveness, safety, and interoperator performance of stereotactic radiofrequency ablation (SRFA) of liver lesions.
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Frame-based vs frameless placement of intrahippocampal depth electrodes in patients with refractory epilepsy: a comparative in vivo (application) study.
Neurosurgery
PUBLISHED: 01-19-2011
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Despite progress in imaging technologies, documentation of unifocal electrical excitability is pivotal in patient selection for epilepsy surgery.
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Respiratory motion control for stereotactic and robotic liver interventions.
Int J Med Robot
PUBLISHED: 07-16-2010
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Control of respiratory motion is an essential prerequisite for stereotactic computer-assisted and robotic interventions in the liver.
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Stereotactic radiofrequency ablation.
Cardiovasc Intervent Radiol
PUBLISHED: 06-25-2010
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To describe the technique of percutaneous stereotactic radiofrequency ablation (SRFA) and its application in a patient with an unresectable multifocal intrahepatic cholangiocarcinoma (ICC).
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Comparison of the accuracy of invasive and noninvasive registration methods for image-guided oral implant surgery.
Int J Oral Maxillofac Implants
PUBLISHED: 06-18-2010
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Registration refers to the linkage of coordinates from an image with actual patient coordinates and has been shown to be the most influential factor in the accuracy of image-guided surgery. Invasive bone markers are the gold standard but require surgical placement prior to imaging. In contrast, registration templates or external registration frames are noninvasive, but their repositioning during imaging and surgery can be a source of error. The purpose of the present study was to determine whether noninvasive registration methods can achieve an accuracy similar to that of invasive bone marker registration.
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Stereotaxy: breaking the limits of current radiofrequency ablation techniques.
Eur J Radiol
PUBLISHED: 03-25-2010
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Radiofrequency ablation (RFA) allows for local curative tumor treatment by inducing coagulation necrosis with high-frequency alternating current. However, the tumor size is the major limiting factor due to a mismatch of the tumor volume and the induced necrotic zone. RFA probes have to be optimally distributed in and around the tumor in order to produce overlapping ablation zones. Due to different guidance and ablation strategies the result is strongly operator dependent and there is a lack of reliability. These challenges can be managed by 3D-planning using a frameless stereotactic navigation system, allowing for the simultaneous display of multiple trajectories. The spatial information gained from 3D imaging is available in coordinates and thus forms an accurate input for performing the intervention. Stereotaxy enables highly accurate probe positioning. Stereotactic radiofrequency ablation (SRFA) may substantially improve the safety and efficacy in clinical practice, especially in the treatment of large and irregularly shaped tumors. The proposed methods may also be used for similar percutaneous local tumor treatments.
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Flapless implant surgery in the edentulous jaw based on three fixed intraoral reference points and image-guided surgical templates: accuracy in human cadavers.
Clin Oral Implants Res
PUBLISHED: 03-25-2010
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In edentulous patients, accurate and stable positioning of a surgical template is impeded by the mobile mucosal tissue. The objective was to evaluate the accuracy of flapless computer-assisted template-guided surgery in an edentulous human cadaver specimen using three fixed oral reference points (FRP) for fixation of the registration mouthpiece and the consecutive surgical template.
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Computer-assisted surgery in the edentulous jaw based on 3 fixed intraoral reference points.
J. Oral Maxillofac. Surg.
PUBLISHED: 02-13-2010
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In computer-assisted implantation surgery, the transfer of prosthodontic-guided planning to the operative site is usually based on a registration template. The precise repositioning of the registration template is crucial for high accuracy and is compromised in edentulous jaws. The purpose was to determine the in vitro registration and targeting accuracy for surgical navigation in the edentulous jaw based on 3 fixed intraoral reference points.
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Tumour ablation: technical aspects.
Cancer Imaging
PUBLISHED: 12-08-2009
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Image-guided percutaneous radiofrequency ablation (RFA) is a minimally invasive, relatively low-risk procedure for tumour treatment. Local recurrence and survival rates depend on the rate of complete ablation of the entire tumour including a sufficient margin of surrounding healthy tissue. Currently a variety of different RFA devices are available. The interventionalist must be able to predict the configuration and extent of the resulting ablation necrosis. Accurate planning and execution of RFA according to the size and geometry of the tumour is essential. In order to minimize complications, individualized treatment strategies may be necessary for tumours close to vital structures. This review examines the state-of-the art of different device technologies, approaches, and treatment strategies for percutaneous RFA of liver tumours.
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State-of-the-art HR-US imaging findings of the most frequent musculoskeletal soft-tissue tumors.
Skeletal Radiol.
PUBLISHED: 09-05-2009
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High resolution ultrasound (HR-US) including color Doppler ultrasound (CD-US), power Doppler ultrasound (PD-US), and spectral wave analysis (SWA), is a broadly available, non-invasive and relatively low-cost modality without ionizing radiation. It is increasingly used for initial assessment of an ambiguous musculoskeletal soft-tissue lesion and for sonographically guided core biopsy. The aim of this review is to provide sonographic findings of the most frequent benign and malign soft-tissue lesions. By this essay, we can show that combined with clinical features, with information on tumor-localization and patient age, many musculoskeletal lesions may be successfully characterized by HR-US. In contrast, a mere morphologic assignment of some fibrous tumors and malignant lesions remains often impossible; however, certain CD-US signs such as anarchic vascular architecture or arteriovenous shunting may be very helpful indicators for malignancy. HR-US offers a simple, quick, and reliable first-line examination of musculoskeletal soft-tissue lesions and may have an important role in the diagnostic work-up followed by magnetic resonance or multimodality imaging and guided core biopsy.
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Target registration and target positioning errors in computer-assisted neurosurgery: proposal for a standardized reporting of error assessment.
Int J Med Robot
PUBLISHED: 07-01-2009
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Assessment of errors is essential in development, testing and clinical application of computer-assisted neurosurgery. Our aim was to provide a comprehensive overview of the different methods to assess target registration error (TRE) and target positioning error (TPE) and to develop a proposal for a standardized reporting of error assessment.
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Multipurpose navigation system-based concept for surgical template production.
J. Oral Maxillofac. Surg.
PUBLISHED: 04-21-2009
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We present a concept that uses the multipurpose navigation equipment of a university hospital for computed tomography (CT)-guided surgical template production, to improve the preclinical accuracy of the templates.
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A laboratory training and evaluation technique for computer-aided oral implant surgery.
Int J Med Robot
PUBLISHED: 04-16-2009
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Navigated oral implant surgery requires knowledge and skills in computed tomography (CT) imaging, three-dimensional (3D) planning, and use of surgical navigation systems. To improve teaching and training, a laboratory training and evaluation technique has been developed.
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Errors and error management in image-guided craniomaxillofacial surgery.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
PUBLISHED: 02-05-2009
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Image-guided surgery is being increasingly used in craniomaxillofacial tumor surgery, trauma surgery, orthognathic surgery, and implant surgery. Compared with conventional procedure, treatment planning is performed on the computer based on previously obtained 3-dimensional imaging data, and the surgical procedure is carried out under guidance of a surgical navigation system. Accuracy is of vital importance for the clinical application of this sophisticated technology. All errors are integrative and depend on many factors, including image modality, registration technique, tracking technology, and application type. Knowledge of errors and error management is important to understand the possibilities and limitations of different image-guided surgical approaches. The aim of this review is to provide a comprehensive overview on the different errors and error management strategies in image-guided craniomaxillofacial surgery.
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Somatostatin receptor PET in neuroendocrine tumours: 68Ga-DOTA0,Tyr3-octreotide versus 68Ga-DOTA0-lanreotide.
Eur. J. Nucl. Med. Mol. Imaging
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The aim of this study was to evaluate the impact of (68)Ga-labelled DOTA(0)-lanreotide ((68)Ga-DOTA-LAN) on the diagnostic assessment of neuroendocrine tumour (NET) patients with low to moderate uptake on planar somatostatin receptor (SSTR) scintigraphy or (68)Ga-labelled DOTA(0),Tyr(3)-octreotide ((68)Ga-DOTA-TOC) positron emission tomography (PET).
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Kirschner wire placement in scaphoid bones using intraoperative CT-guided stereotaxy.
Minim Invasive Ther Allied Technol
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Minimally invasive ostesynthesis of scaphoid fractures may reduce the risk of fracture non-union and shorten the duration of illness. The aim of this study was to analyze the technical feasibility and targeting accuracy of computed tomography (CT) - guided stereotactic Kirschner (K)-wire positioning in the scaphoid.
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Surgical resection technique of a fused supernumerary lateral incisor: a clinical report and review of the literature.
Gen Dent
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This case report presents the surgical and restorative management of a fused supernumerary left lateral incisor. The diagnosis was confirmed using conventional radiographs and CT. The case report discusses the value of CT for evaluation of the root relationships and describes the varied morphology associated with supernumerary incisors, the surgical resection technique, partial pulpotomy, and restoration with composite resin after mechanical exposure of the remaining tooths pulp.
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CT-guided stereotactic targeting accuracy of osteoid osteoma.
Int J Med Robot
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The aim of this study was to evaluate the CT-guided stereotactic targeting accuracy for radiofrequency ablation of osteoid osteoma (OO), a small, benign but painful osseous lesion.
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Multipolar radiofrequency ablation using 4-6 applicators simultaneously: a study in the ex vivo bovine liver.
Eur J Radiol
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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. Standardized measurements of the volume and shape of the coagulation zones were carried out on magnetic resonance images and statistically analyzed. The coagulation zones induced with solitary applicators and with 2 applicators were imperceptibly small and incomplete, respectively. At 20mm applicator distance, the total ablated volume was significantly larger if all applicators were arranged in a single group compared to placement in 2 distant applicator groups, each consisting of 3 applicators (p=.001). The mean total coagulated volume ranged from immeasurably small (if 6 solitary applicators were applied simultaneously) to 74.7 cc (if 6 applicators at 30 mm distance between neighboring applicators were combined to a single group). Applicator distance, number and positioning array impacted time and shape. The coagulation zones surrounding groups with 4-6 applicators were regularly shaped, homogeneous and completely fused, and the axial diameters were almost constant. In conclusion, multipolar RFA with 4-6 applicators is feasible. The multipolar simultaneous mode should be applied for large and solitary lesions only, small and multiple tumors should be ablated consecutively in standard multipolar mode with up to 3 applicators.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

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We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

Video X seems to be unrelated to Abstract Y...

In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.