Calcium identification and scoring based on echocardiography. An exploratory study on aortic valve stenosis
| العنوان: | Calcium identification and scoring based on echocardiography. An exploratory study on aortic valve stenosis |
|---|---|
| المؤلفون: | Luís Brás Rosário, Luís B. Elvas, Miguel Sales Dias, João Ferreira, Ana G. Almeida |
| المصدر: | Journal of Personalized Medicine Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Volume 11 Issue 7 Journal of Personalized Medicine, Vol 11, Iss 598, p 598 (2021) |
| بيانات النشر: | MDPI, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Aortic valve, Computer science, Image classification, Feature extraction, Medicine (miscellaneous), chemistry.chemical_element, 030204 cardiovascular system & hematology, Calcium, Coronary artery disease, Coronary artery calcium, Article, computer vision, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, symbols.namesake, 0302 clinical medicine, Region of interest, medicine, Computer vision, ultrasound images, Computed tomography, coronary artery calcium, Pixel, Contextual image classification, business.industry, feature extraction, Ciências Naturais::Ciências da Computação e da Informação [Domínio/Área Científica], computed tomography, CT-scan, echocardiograms, Pearson product-moment correlation coefficient, Intensity (physics), medicine.anatomical_structure, chemistry, symbols, Ultrasound images, Medicine, Artificial intelligence, business, coronary artery disease, image classification, Echocardiograms |
| الوصف: | 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. info:eu-repo/semantics/publishedVersion |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76f10322a749c0a7f4076be18e144cb4 https://hdl.handle.net/10071/22839 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....76f10322a749c0a7f4076be18e144cb4 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |