We use cookies to understand how you use our site and to improve your experience. This includes personalizing content and advertising. To learn more, click here. By continuing to use our site, you accept our use of cookies. Cookie Policy.

Features Partner Sites Information LinkXpress
Sign In
Advertise with Us

Download Mobile App




Events

ATTENTION: Due to the COVID-19 PANDEMIC, many events are being rescheduled for a later date, converted into virtual venues, or altogether cancelled. Please check with the event organizer or website prior to planning for any forthcoming event.
30 Jan 2023 - 02 Feb 2023

Unsupervised AI Model Accurately Predicts COVID-19 Patient's Survival Based on Chest CT Exams

By MedImaging International staff writers
Posted on 08 Aug 2021
Print article
Illustration
Illustration
An "unsupervised" artificial intelligence (AI) model, or one trained without image annotations, can accurately predict the survival of COVID-19 patients on the basis of their chest computed tomography (CT) exams.

Researchers from Massachusetts General Hospital (Boston, MA, USA) have shown that the performance of their pix2surv algorithm based on CT images significantly outperformed those of existing laboratory tests and image-based visual and quantitative predictors in estimating the disease progression and mortality of COVID-19 patients. Thus, pix2surv offers a promising approach for performing image-based prognostic predictions.

Because of the rapid spread and wide range of the clinical manifestations of the coronavirus disease 2019 (COVID-19), fast and accurate estimation of the disease progression and mortality is vital for the management of the patients. Currently available image-based prognostic predictors for patients with COVID-19 are largely limited to semi-automated schemes with manually designed features and supervised learning, and the survival analysis is largely limited to logistic regression. To resolve this problem, the researchers developed a weakly unsupervised conditional generative adversarial network, called pix2surv, which can be trained to estimate the time-to-event information for survival analysis directly from the chest CT images of a patient.

pix2surv enables the estimation of the distribution of the survival time directly from the chest CT images of patients. The model avoids the technical limitations of the previous image-based COVID-19 predictors, because the use of a fully automated conditional GAN makes it possible to train a complete image-based end-to-end survival analysis model for producing the time-to-event distribution directly from input chest CT images without an explicit segmentation or feature extraction efforts. Also, because of the use of weakly unsupervised learning, the annotation effort is reduced to the pairing of input training CT images with the corresponding observed survival time of the patient.

In their study the researchers showed that the prognostic performance of pix2surv based on chest CT images compares favorably with those of currently available laboratory tests and existing image-based visual and quantitative predictors in the estimation of the disease progression and mortality of COVID-19 patients. They also showed that the time-to-event information calculated by pix2surv based on chest CT images enables stratification of the patients into low- and high-risk groups by a wider margin than those of the other predictors. Thus, pix2surv offers a promising approach for performing image-based prognostic prediction for the management of COVID-19 patients.

Related Links:

Print article
CIRS -  MIRION
Radcal

Channels

MRI

view channel
Image: Hyperpolarized MRI technology reveals changes in heart muscle’s sugar metabolism after heart attack (Photo courtesy of ETH Zurich)

MRI Technology to Visualize Metabolic Processes in Real Time Could Improve Heart Disease Diagnosis

Magnetic resonance imaging (MRI) has become an indispensable part of medicine. It allows unique insights into the body and diagnosis of various diseases. However, current MRI technology has its limitations:... Read more

Ultrasound

view channel
Image: A combination of ultrasound and nanobubbles allows cancerous tumors to be destroyed without surgery (Photo courtesy of Tel Aviv University)

Ultrasound Combined With Nanobubbles Enables Removal of Tumors Without Surgery

The prevalent method of cancer treatment is surgical removal of the tumor, in combination with complementary treatments such as chemotherapy and immunotherapy. Therapeutic ultrasound to destroy the cancerous... Read more

General/Advanced Imaging

view channel
Image: AI tool predicts reduced blood flow to the heart (Photo courtesy of Pexels)

AI Tool Uses CT Scans to Identify Patients at Risk of Reduced Blood Flow to the Heart

Blockages of the coronary arteries typically occur due to the buildup of fatty plaques. This may restrict blood flow to the heart, causing chest pain, heart attacks, or even death. Identifying which arteries... Read more

Imaging IT

view channel
Image: The new Medical Imaging Suite makes healthcare imaging data more accessible, interoperable and useful (Photo courtesy of Google Cloud)

New Google Cloud Medical Imaging Suite Makes Imaging Healthcare Data More Accessible

Medical imaging is a critical tool used to diagnose patients, and there are billions of medical images scanned globally each year. Imaging data accounts for about 90% of all healthcare data1 and, until... Read more
Copyright © 2000-2022 Globetech Media. All rights reserved.