scholarly journals Segmentation of the Aortic Valve Apparatus in 3D Echocardiographic Images: Deformable Modeling of a Branching Medial Structure

2015 ◽  
pp. 196-203 ◽  
Author(s):  
Alison M. Pouch ◽  
Sijie Tian ◽  
Manabu Takabe ◽  
Hongzhi Wang ◽  
Jiefu Yuan ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Deformable Modeling ◽  
Echocardiographic Images

scholarly journals Calcium Identification and Scoring Based on Echocardiography. An Exploratory Study on Aortic Valve Stenosis

2021 ◽  
Vol 11 (7) ◽  
pp. 598
Author(s):  
Luis B. Elvas ◽  
Ana G. Almeida ◽  
Luís Rosario ◽  
Miguel Sales Dias ◽  
João C. Ferreira
Keyword(s):  
Aortic Valve ◽  
Ct Scan ◽  
Pearson Correlation ◽  
Region Of Interest ◽  
Expert Assessment ◽  
Image Binarization ◽  
Real Patient ◽  
Margin Of Error ◽  
Pixel Value ◽  
Echocardiographic Images

Currently, an echocardiography expert is needed to identify calcium in the aortic valve, and a cardiac CT-Scan image is needed for calcium quantification. When performing a CT-scan, the patient is subject to radiation, and therefore the number of CT-scans that can be performed should be limited, restricting the patient’s monitoring. Computer Vision (CV) has opened new opportunities for improved efficiency when extracting knowledge from an image. Applying CV techniques on echocardiography imaging may reduce the medical workload for identifying the calcium and quantifying it, helping doctors to maintain a better tracking of their patients. In our approach, a simple technique to identify and extract the calcium pixel count from echocardiography imaging, was developed by using CV. Based on anonymized real patient echocardiographic images, this approach enables semi-automatic calcium identification. As the brightness of echocardiography images (with the highest intensity corresponding to calcium) vary depending on the acquisition settings, echocardiographic adaptive image binarization has been performed. Given that blood maintains the same intensity on echocardiographic images—being always the darker region—blood areas in the image were used to create an adaptive threshold for binarization. After binarization, the region of interest (ROI) with calcium, was interactively selected by an echocardiography expert and extracted, allowing us to compute a calcium pixel count, corresponding to the spatial amount of calcium. The results obtained from these experiments are encouraging. With this technique, from echocardiographic images collected for the same patient with different acquisition settings and different brightness, obtaining a calcium pixel count, where pixel values show an absolute pixel value margin of error of 3 (on a scale from 0 to 255), achieving a Pearson Correlation of 0.92 indicating a strong correlation with the human expert assessment of calcium area for the same images.

Speckle noise reduction in echocardiographic images of aortic valve and cardiac chambers

Optik ◽  
2015 ◽  
Vol 126 (2) ◽  
pp. 153-163 ◽  
Author(s):  
Nagashettappa Biradar ◽  
M.L. Dewal ◽  
Manoj Kumar Rohit
Keyword(s):  
Aortic Valve ◽  
Noise Reduction ◽  
Speckle Noise ◽  
Echocardiographic Images ◽  
Speckle Noise Reduction

scholarly journals Multiple papillary fibroelastomas of the aortic valve detected by real time three-dimensional transesophageal echocardiographic images

2013 ◽  
Vol 8 (1) ◽  
pp. e9-e12
Author(s):  
Koji Kurosawa ◽  
Kazuaki Negishi ◽  
Rieko Tateno ◽  
Norimichi Koitabashi ◽  
Norimasa Koike ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Real Time ◽  
Three Dimensional ◽  
Echocardiographic Images

scholarly journals Automated Segmentation and Geometrical Modeling of the Tricuspid Aortic Valve in 3D Echocardiographic Images

2013 ◽  
pp. 485-492 ◽  
Author(s):  
Alison M. Pouch ◽  
Hongzhi Wang ◽  
Manabu Takabe ◽  
Benjamin M. Jackson ◽  
Chandra M. Sehgal ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Automated Segmentation ◽  
Tricuspid Aortic Valve ◽  
Geometrical Modeling ◽  
Echocardiographic Images

scholarly journals Assessment of aortic valve tract dynamics using automatic tracking of 3D transesophageal echocardiographic images

2019 ◽  
Vol 35 (5) ◽  
pp. 881-895 ◽  
Author(s):  
Sandro Queirós ◽  
Pedro Morais ◽  
Wolfgang Fehske ◽  
Alexandros Papachristidis ◽  
Jens-Uwe Voigt ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Automatic Tracking ◽  
Echocardiographic Images

scholarly journals P849 An uncommon reason for transient ischemic attack: nonbacterial thrombotic endocarditis

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
G Babur Guler ◽  
A Kilicgedik ◽  
H Zencirkiran Agus ◽  
G Kahveci
Keyword(s):  
Mitral Valve ◽  
Aortic Valve ◽  
Transient Ischemic Attack ◽  
Lupus Erythematosus ◽  
Rare Condition ◽  
Metastatic Lung ◽  
Mitral Disease ◽  
Echocardiographic Images ◽  
Ischemic Attack ◽  
Valve Pathology

Abstract Introduction Non-bacterial thrombotic endocarditis (NBTE) is a rare condition which is usually associated with embolic complications. The exclusion of culture positive and negative infective endocarditis and the clinician"s suspicion of NBTE are the most important steps in the diagnosis. Purpose Illustrative echocardiographic images of NBTE in a patient with lung adenocarcinoma. Case Report A 48-year-old male patient was followed up in oncology clinic for known metastatic lung adeno carcinoma. The patient was referred to cardiology after a transient ischemic attack. Transthoracic echocardiography showed significant thickening of the mitral valve tips. In contrast to the rheumatic mitral disease valve opening was well preserved, signs of calcification and doming of anterior leaflet were absent. Transesophageal echocardiography was performed. Hypoechogenous thickening was observed at the mitral valve tips, measuring 1.39x1.33 cm in diameter. On the atrial side of the P2 scalllop, a mass with a diameter of 3.47 cm was seen. Central mitral regurgitation was observed. Aortic valve was structurally and functionally normal. The patient had no fever, serology and blood cultures were negative. Cranial magnetic resonans imaging showed multiple ischemic foci in the brain. The patient was considered NBTE in the light of these findings. Anticoagulation with warfarin was recommended. After 1 months patient deceased because of cancer. Conclusion(s): NBTE is a condition that should be included in the differentials when the valve pathology is seen in patients with associated diseases (systemic lupus erythematosus, malignancy, disseminated intravascular coagulation, non-bacterial sepsis). Sterile vegetations seen at the contact surfaces of the mitral and aortic valves are typical lesions. They tend to involve the atrial side of the mitral and ventricular side for the aortic valve. Clinical suspicion is critical in the diagnosis of NBTE. The detection of vegetations on echocardiography without signs of infection and in patients with predisposing conditions leads to diagnosis. Abstract P849 Figure.

scholarly journals Medially constrained deformable modeling for segmentation of branching medial structures: Application to aortic valve segmentation and morphometry

2015 ◽  
Vol 26 (1) ◽  
pp. 217-231 ◽  
Author(s):  
Alison M. Pouch ◽  
Sijie Tian ◽  
Manabu Takebe ◽  
Jiefu Yuan ◽  
Robert Gorman ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Deformable Modeling

An Assessment of Ca-Naphthenate-Epon Mixtures as Standards for Calcium Quantification in Aortic Valve Leaflets

1982 ◽  
Vol 40 ◽  
pp. 390-391
Author(s):  
Kathryn N. Colonna ◽  
Sydney S. Breese ◽  
Susan C. Sellers ◽  
J. David Deck
Keyword(s):  
Aortic Valve ◽  
Aortic Valves ◽  
X Ray ◽  
Aortic Valve Leaflets

Qualitative x-ray microanalytical studies used to demonstrate calcium in bioprosthetic aortic valves have shown that it occurs in a range of morphological forms. A consistent and reproducible standard for measuring calcium was necessary to investigate whether these forms represented varying concentrations of calcium. To provide such a standard, we tested a series of calcium naphthenate-epon mixtures.

Minimally aortic valve surgery avoiding sternotomy*1

1999 ◽  
Vol 16 ◽  
pp. S84-S85 ◽  
Author(s):  
F BENETTI
Keyword(s):  
Aortic Valve ◽  
Valve Surgery ◽  
Aortic Valve Surgery
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