An evaluation of systematic errors on marker-based registration of computed tomography and magnetic resonance images of the liver. (July 2018)

• Record Type: Journal Article
• Authors: Woolcot, Thomas; Kousi, Evanthia; Wells, Emma; Aitken, Katharine; Taylor, Helen; Schmidt, Maria A.
• Is Part Of: Physics and imaging in radiation oncology. Volume 7(2018)
• Page Start: 27
• Page End: 31
• Publication Date: 2018-07
• Subjects: Registration -- Fiducial markers -- Stereotactic radiotherapy -- Liver; Radiotherapy -- Periodicals; Radiation dosimetry -- Periodicals; Cancer -- Imaging -- Periodicals; Oncology -- Periodicals; 615.842
• DOI: 10.1016/j.phro.2018.08.001
• Languages: English
• ISSNs: 2405-6316

Abstract

Abstract: We demonstrated a general method to evaluate systematic errors related to Magnetic Resonance (MR) imaging sequences in marker-based co-registration of MR and Computed Tomography (CT) images, and investigated the effect of MR image quality in the co-registration process using clinical MR and CT protocols for stereotactic ablative body radiotherapy (SABR) planning of the liver. Small systematic errors (under 1.6 mm) were detected, unlikely to be a clinical risk to liver SABR. The least favourable marker configuration was found to be a co-planar arrangement parallel to the transaxial image plane.