scholarly journals 757 Cardio-TC role in patients selection for transcatheter edge to edge tricuspid repair

2021 ◽  
Vol 23 (Supplement_G) ◽  
Author(s):  
Edoardo Nobile ◽  
Valeria Cammalleri ◽  
Domenico De Stefano ◽  
Luka Vitez ◽  
Aurelio De Filippis ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Tricuspid Valve ◽  
High Spatial Resolution ◽  
Three Dimensional ◽  
Vena Cava ◽  
Endocardial Border ◽  
Centroid Distance ◽  
Study Population ◽  
Regurgitant Orifice Area ◽  
The Right

Abstract Aims Anatomic knowledge of the tricuspid valve (TV) is the first step in the management of patients with tricuspid regurgitation (TR) who are candidates for transcatheter tricuspid valve intervention (TTVI). Echocardiography is undoubtedly the first approach in assessing the aetiology and severity of TR and the size and function of the right chambers. Computed tomography (CT) provides a detailed morphological visualization of the cardiac structures owing to acquisition of 3D data with high spatial resolution. These findings may undoubtedly help in decision-making progress for novel transcatheter therapies. The purpose of the present study was to assess the geometrical changes of the TV complex using CT images, in patients suffering from functional TR and lead-induced TR. Methods The study population consisted of 21 consecutive patients with symptomatic severe TR referred to Policlinico Universitario Campus Biomedico between November 2020 and October 2021. Patients were prospectively included in the study only if they presented severe TR, diagnosed by echocardiography and underwent cardiac CT study dedicated to the right-chambers. The reconstructions were transferred to an external workstation for off-line image analysis. The following measurements were reported: tricuspid annulus area, perimeter, septal–lateral and antero-posterior diameters. Commissures were identified as antero-septal (AS), postero-septal (PS) and anteroposterior (AP). Were measured the inferior vena cava ostium to tricuspid valve centroid distance, anatomic regurgitant orifice area (AROA) and its position respect to the centroid, and the right chambers. Results All 21 patients underwent CT scan using Siemens SOMATOM Definition AS 128 Slice CT Machine. The measurements were calculated off-line using the 3mensio workstation. In our study population, the annulus resulted enlarged in the annulus area, perimeter, septal-lateral and anterior-posterior dimensions. Measurements did not differ significantly, except for the septal-lateral diameter that was smaller in systole (52.80 ± 7.28 mm vs. 47.83 ± 6.83 mm (P=0.027). Also, distances between the commissures were similar except for the AP-AS distance that was shorter in systole (45.26 ± 3.48 mm vs. 42.13 ± 3.73, P=0.007). The AROA resulted to be central in 7 patients, the IVC ostium to TV centroid distance was 23±3 mm. Right chambers and IVC resulted very enlarged in all patients. Conclusions CT provides a complete morphologic imaging of the heart structures, thanks to a high spatial resolution with excellent capacity to define the endocardial border and allows acquisition of three-dimensional data with high spatial resolution of the TV and provides valuable information about the geometric variations of the tricuspid complex in patients with TR. Image quality for analysis should be optimized with specific CT acquisition protocols that focus on the right ventricles.

scholarly journals The developement of red mud flood environmental information system and the methodology for the spatial analysis of the degraded area

2015 ◽  
Vol 9 (1) ◽  
pp. 1-11
Author(s):  
Gábor Bakó ◽  
Gábor Kovács ◽  
Zsolt Molnár ◽  
Judit Kirisics ◽  
Eszter Góber ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Spatial Resolution ◽  
Red Mud ◽  
High Spatial Resolution ◽  
Three Dimensional ◽  
Environmental Information ◽  
Evaluation Methodology ◽  
Aerial Photogrammetry ◽  
Impact Area ◽  
The Impact

The red mud disaster occurred on 4th October 2010 in Hungary has raised the necessity of rapid intervention and drew attention to the long-term monitoring of such threat. Both the condition assessment and the change monitoring indispensably required the prompt and detailed spatial survey of the impact area. It was conducted by several research groups - independently - with different recent surveying methods. The high spatial resolution multispectral aerial photogrammetry is the spatially detailed (high resolution) and accurate type of remote sensing. The hyperspectral remote sensing provides more information about material quality of pollutants, with less spatial details and lower spatial accuracy, while LIDAR ensures the three-dimensional shape and terrain models. The article focuses on the high spatial resolution, multispectral electrooptical method and the evaluation methodology of the deriving high spatial resolution ortho image map, presenting the derived environmental information database

scholarly journals Bathymetry Time Series Using High Spatial Resolution Satellite Images

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 531 ◽  
Author(s):  
Manuel Erena ◽  
José A. Domínguez ◽  
Joaquín F. Atenza ◽  
Sandra García-Galiano ◽  
Juan Soria ◽  
...  
Keyword(s):  
High Precision ◽  
Spatial Resolution ◽  
Satellite Images ◽  
Environmental Variability ◽  
High Spatial Resolution ◽  
Numerical Models ◽  
Three Dimensional ◽  
Satellite System ◽  
Precision Data ◽  
Mar Menor

The use of the new generation of remote sensors, such as echo sounders and Global Navigation Satellite System (GNSS) receivers with differential correction installed in a drone, allows the acquisition of high-precision data in areas of shallow water, as in the case of the channel of the Encañizadas in the Mar Menor lagoon. This high precision information is the first step to develop the methodology to monitor the bathymetry of the Mar Menor channels. The use of high spatial resolution satellite images is the solution for monitoring many hydrological changes and it is the basis of the three-dimensional (3D) numerical models used to study transport over time, environmental variability, and water ecosystem complexity.

Heart valve disease: tricuspid valve disease

2016 ◽  
Author(s):  
Denisa Muraru ◽  
Ashraf M. Anwar ◽  
Jae-Kwan Song
Keyword(s):  
Tricuspid Valve ◽  
Tricuspid Regurgitation ◽  
Imaging Modality ◽  
Three Dimensional ◽  
Valve Disease ◽  
Heart Valve Disease ◽  
Functional Tricuspid Regurgitation ◽  
Valve Pathology ◽  
Three Dimensional Echocardiography ◽  
The Right

The tricuspid valve is currently the subject of much interest from echocardiographers and surgeons. Functional tricuspid regurgitation is the most frequent aetiology of tricuspid valve pathology, is characterized by structurally normal leaflets, and is due to annular dilation and/or leaflet tethering. A primary cause of tricuspid regurgitation with/without stenosis can be identified only in a minority of cases. Echocardiography is the imaging modality of choice for assessing tricuspid valve diseases. It enables the cause to be identified, assesses the severity of valve dysfunction, monitors the right heart remodelling and haemodynamics, and helps decide the timing for surgery. The severity assessment requires the integration of multiple qualitative and quantitative parameters. The recent insights from three-dimensional echocardiography have greatly increased our understanding about the tricuspid valve and its peculiarities with respect to the mitral valve, showing promise to solve many of the current problems of conventional two-dimensional imaging. This chapter provides an overview of the current state-of-the-art assessment of tricuspid valve pathology by echocardiography, including the specific indications, strengths, and limitations of each method for diagnosis and therapeutic planning.

Chemical Nano-tomography of Self-assembled Ge-Si:Si(001) Islands from Quantitative High Resolution Transmission Electron Microscopy

2009 ◽  
Vol 1184 ◽  
Author(s):  
Luciano Andrey Montoro ◽  
Marina Leite ◽  
Daniel Biggemann ◽  
Fellipe Grillo Peternella ◽  
Kees Joost Batenburg ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Three Dimensional ◽  
Precise Knowledge ◽  
Transmission Electron ◽  
Self Consistent ◽  
Chemical Distribution

AbstractThe knowledge of composition and strain with high spatial resolution is highly important for the understanding of the chemical and electronic properties of alloyed nanostructures. Several applications require a precise knowledge of both composition and strain, which can only be extracted by self-consistent methodologies. Here, we demonstrate the use of a quantitative high resolution transmission electron microscopy (QHRTEM) technique to obtain two-dimensional (2D) projected chemical maps of epitaxially grown Ge-Si:Si(001) islands, with high spatial resolution, at different crystallographic orientations. By a combination of these data with an iterative simulation, it was possible infer the three-dimensional (3D) chemical arrangement on the strained Ge-Si:Si(001) islands, showing a four-fold chemical distribution which follows the nanocrystal shape/symmetry. This methodology can be applied for a large variety of strained crystalline systems, such as nanowires, epitaxial islands, quantum dots and wells, and partially relaxed heterostructures.

scholarly journals High-spatial-resolution Three-dimensional CT Angiography for Acute Surgery of Cerebral Aneurysms

2013 ◽  
Vol 41 (2) ◽  
pp. 130-136
Author(s):  
Yoshitsugu OIWA ◽  
Hirotaka OKUMURA ◽  
Yoko HIROHATA ◽  
Ryohei TANAKA ◽  
Hiroo YAMAGA ◽  
...  
Keyword(s):  
Ct Angiography ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Three Dimensional ◽  
Cerebral Aneurysms ◽  
Acute Surgery

scholarly journals Incidental Gossypiboma Discovered during Tricuspid Valve Re-Repair 11 Years after Ebstein Anomaly Repair

2013 ◽  
Vol 16 (4) ◽  
pp. 216 ◽  
Author(s):  
Tornike Sologashvili ◽  
Afksendiyos Kalangos ◽  
C�cile Tissot ◽  
Patrick O. Myers
Keyword(s):  
Cardiac Surgery ◽  
Tricuspid Valve ◽  
Superior Vena ◽  
Vena Cava ◽  
Granulomatous Reaction ◽  
Ebstein Anomaly ◽  
Surgical Sponge ◽  
Severe Tricuspid Regurgitation ◽  
Retained Surgical Sponge ◽  
The Right

<p><b>Background:</b> A retained surgical sponge, an extremely rare occurrence after cardiac surgery, can trigger a granulomatous reaction and form a sizeable mass or gossypiboma. We report the incidental operative finding of a gossypiboma 11 years after repair of Ebstein anomaly.</p><p><b>Case Report:</b> A 24-year-old man, who had previously undergone tricuspid annuloplasty for Ebstein anomaly 11 years earlier at another institution, was referred for recurrent severe tricuspid regurgitation. During the dissection along the superior vena cava and the right atrium, we entered 2 cystic cavities that exuded a pus-like material, which was sent for culture. Mesh from a retained surgical sponge (gossypiboma) was identified. After complete debridement and administration of vancomycin, the tricuspid valve was repaired. Antibiotics were continued until culture results were confirmed to be negative. The patient's postoperative course was uneventful, and he presented no signs of infection.</p><p><b>Conclusions:</b> We report a rare case of incidentally found gossypiboma after cardiac surgery.</p>

scholarly journals METHOD FOR DESIGNING SURGICAL ACCESS FOR ADRENALECTOMY USING 3D-MODELING

2020 ◽  
Vol 23 (2) ◽  
pp. 165-171
Author(s):  
P. N. Romashchenko ◽  
I. S. Zheleznyak ◽  
N. A. Maistrenko ◽  
S. G. Bliumina
Keyword(s):  
Inferior Vena Cava ◽  
Inferior Vena ◽  
Left Kidney ◽  
Three Dimensional ◽  
Vena Cava ◽  
Vascular Complications ◽  
Risk Criteria ◽  
Surgical Access ◽  
Preoperative Ct ◽  
The Right

In the literature, insufficient attention is paid to the preoperative planning of the approach to adrenal glands using the modern capabilities of computed tomography (CT) navigation. The aim of the work was to demonstrate the possibilities of designing safe access for adrenalectomy using three-dimensional printed models based on preoperative CT data. The possibilities of preoperative access design for edrenalectomy were studied in 362 adrenal tumor patients who underwent CT imaging on Aquillion 64 (Toshiba, Japan), followed by post-processor image processing, construction of multi-plane and 3D reconstructions. All patients were divided into retrospective (n=157) and prospective (n=205) groups. In 3 clinical cases, preoperative access design was supplemented by the creation of a three-dimensional printed model of the adrenal gland with a tumor using the Slicer 4.10.1 software. Reliable anthropometric (body mass index, body shape) and CT-criteria for designing surgical access to the left and right adrenals were determined: diameter of formation; tumor syntopy in relation to the walls of the inferior vena cava; the length of the central adrenal vein and the place where it flows into the inferior vena cava; the location of the tumor relative to the inferior vein of the right lobe of the liver, as well as relative to the gate of the right kidney; location near the aortic-renal vascular triangle, gate of the left kidney and spleen vessels. Three patients with a borderline number of risk criteria for the development of vascular complications associated with the technical difficulties of adrenalectomy (for right adrenals≥4, for left adrenals≥3) underwent CT-segmentation of images with the subsequent creation of three-dimensional plates - a model of an NP tumor with neighboring organs and vessels. Preoperative CT design of the approach, taking into account the risk criteria for complications and the use of 3-D printed models, can reasonably apply endoscopic and open options for adrenalectomy, significantly improving the immediate results of treatment of patients.

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