Abstract Positron Emission Tomography (PET), a non-invasive functional imaging method at
the molecular level, images the distribution of biologically targeted radiotracers with high …

Historically, anatomical CT and MR images were used to delineate the gross tumour
volumes (GTVs) for radiotherapy treatment planning. The capabilities offered by modern …

This document is the report of a task group of the AAPM and has been prepared primarily to
advise medical physicists involved in the external‐beam radiation therapy of patients with …

Background: Radiomics is a promising methodology for quantitative analysis and
description of radiological images using advanced mathematics and statistics. Tumor …

PURPOSE: Many patients receiving fractionated radiotherapy (RT) for head-and-neck
cancer have marked anatomic changes during their course of treatment, including shrinking …

Introduction Inter‐observer variability (IOV) in target volume and organ‐at‐risk (OAR)
delineation is a source of potential error in radiation therapy treatment. The aims of this study …

Background and purpose Volume delineation is a well-recognised potential source of error
in radiotherapy. Whilst it is important to quantify the degree of interobserver variability (IOV) …

PURPOSE: To investigate the usefulness of hardware coregistered PET/CT images for
target volume definition. METHODS AND MATERIALS: Thirty-nine patients presenting with …

Purpose: Target delineation using only CT information introduces large geometric
uncertainties in radiotherapy for lung cancer. Therefore, a reduction of the delineation …

Purpose: To compare source-to-background ratio (SBR)-based PET-CT auto-delineation
with pathology in non–small-cell lung cancer (NSCLC) and to investigate whether auto …