Publications by authors named "Ryan Bahar"

Article Synopsis
  • The study compares volumetric measurements of pediatric low-grade gliomas (pLGG) to simpler 2D methods traditionally used in clinical trials, aiming to determine which is more effective for assessing tumor response.
  • An expert neuroradiologist assessed both solid and whole tumor volumes from MRI scans, finding that 3D volumetric analysis significantly outperformed 2D assessments in classifying tumor progression based on the BT-RADS criteria.
  • Results showed that using 3D volume thresholds provided strong sensitivity for detecting tumor progression, suggesting that volumetric methods could enhance clinical management of pLGG.
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Article Synopsis
  • Gliomas have varied molecular profiles that can impact patient survival and treatment choices, but existing diagnostic methods are often invasive and complex due to tumor heterogeneity.
  • A systematic review analyzed various machine learning algorithms predicting glioma molecular subtypes based on MRI data, screening thousands of studies to find 85 relevant articles.
  • Despite promising accuracy rates in internal validations (up to 88% for IDH mutation status), the review noted significant bias and limitations due to a lack of external validation and incomplete data across studies.
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Purpose: Personalized interpretation of medical images is critical for optimum patient care, but current tools available to physicians to perform quantitative analysis of patient's medical images in real time are significantly limited. In this work, we describe a novel platform within PACS for volumetric analysis of images and thus development of large expert annotated datasets in parallel with radiologist performing the reading that are critically needed for development of clinically meaningful AI algorithms. Specifically, we implemented a deep learning-based algorithm for automated brain tumor segmentation and radiomics extraction, and embedded it into PACS to accelerate a supervised, end-to- end workflow for image annotation and radiomic feature extraction.

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Background: While there are innumerable machine learning (ML) research algorithms used for segmentation of gliomas, there is yet to be a US FDA cleared product. The aim of this study is to explore the systemic limitations of research algorithms that have prevented translation from concept to product by a review of the current research literature.

Methods: We performed a systematic literature review on 4 databases.

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In the past forty years, clinician-educators have become indispensable to academic medicine. Numerous clinician-educator-training programs exist within graduate medical education (GME) as clinician-educator tracks (CETs). However, there is a call for the clinician-educator pipeline to begin earlier.

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Technological innovation has enabled the development of machine learning (ML) tools that aim to improve the practice of radiologists. In the last decade, ML applications to neuro-oncology have expanded significantly, with the pre-operative prediction of glioma grade using medical imaging as a specific area of interest. We introduce the subject of ML models for glioma grade prediction by remarking upon the models reported in the literature as well as by describing their characteristic developmental workflow and widely used classifier algorithms.

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Objectives: To systematically review, assess the reporting quality of, and discuss improvement opportunities for studies describing machine learning (ML) models for glioma grade prediction.

Methods: This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses of Diagnostic Test Accuracy (PRISMA-DTA) statement. A systematic search was performed in September 2020, and repeated in January 2021, on four databases: Embase, Medline, CENTRAL, and Web of Science Core Collection.

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Learning to perceptually discriminate between chemical signals in the environment (olfactory perceptual learning [OPL]) is critical for survival. Multiple mechanisms have been implicated in OPL, including modulation of neurogenesis and manipulation of cholinergic activity. However, whether these represent distinct processes regulating OPL or if cholinergic effects on OPL depend upon neurogenesis has remained an unresolved question.

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