Can images obtained with high field strength magnetic resonance imaging reduce contouring variability of the prostate?

International Journal of Radiation Oncology, Biology, Physics
Nawaid UsmaniTara Monajemi

Abstract

The objective of this study is to determine whether there is less contouring variability of the prostate using higher-strength magnetic resonance images (MRI) compared with standard MRI and computed tomography (CT). Forty patients treated with prostate brachytherapy were accrued to a prospective study that included the acquisition of 1.5-T MR and CT images at specified time points. A subset of 10 patients had additional 3.0-T MR images acquired at the same time as their 1.5-T MR scans. Images from each of these patients were contoured by 5 radiation oncologists, with a random subset of patients repeated to quantify intraobserver contouring variability. To minimize bias in contouring the prostate, the image sets were placed in folders in a random order with all identifiers removed from the images. Although there was less interobserver contouring variability in the overall prostate volumes in 1.5-T MRI compared with 3.0-T MRI (p < 0.01), there was no significant differences in contouring variability in the different regions of the prostate between 1.5-T MRI and 3.0-T MRI. MRI demonstrated significantly less interobserver contouring variability in both 1.5-T and 3.0-T compared with CT in overall prostate volumes (p < 0.01, p = 0.0...Continue Reading

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Citations

Jan 28, 2012·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·I FotinaD Georg
May 15, 2013·Brachytherapy·Noha JastaniyahNawaid Usmani
Dec 3, 2016·Medical Physics·R Jason Stafford, Ivan A Brezovich
Jan 11, 2021·Cancer radiothérapie : journal de la Société française de radiothérapie oncologique·A IlamuruguR Velayudham

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