Development of Periapical Index Score Classification System in Periapical Radiographs Using Deep Learning.

Periapical index (PAI) scoring system is the most popular index for evaluating apical periodontitis (AP) on radiographs. It provides an ordinal scale of 1 to 5, ranging from healthy to severe AP. Scoring PAI is a time-consuming process and requires experienced dentists; thus, deep learning has been applied to hasten the process.

Head-to-head comparison of F-FDG and F-FES PET/CT for initial staging of ER-positive breast cancer patients.

Purpose: To compare the diagnostic performance of F-fluorodeoxyglucose (F-FDG) and F-fluoroestradiol (F-FES) positron emission tomography/computed tomography (PET/CT) for initial staging of estrogen receptor (ER) positive breast cancer.

Methods: Twenty-eight patients with ER-positive breast cancer underwent F-FDG and F-FES PET/CT for initial staging. Diagnostic performance and concordance rates were analyzed for both radiotracers.

Comparison of performance between an -FDG PET normal brain template and a commercial template using the software.

Purpose: The aim of this study was to create and validate a normal brain template of -fluorodeoxyglucose ( ) uptake using the MIMneuro software to improve clinical practice.

Approach: One hundred and nine volunteers underwent an positron emission tomography/computed tomography scan. Sixty-three participants with normal Alzheimer's disease (AD) biomarkers were used to create a template.