The impact of an educational tool in cervix image registration across three imaging modalities

Rebecca Benson, John E. Rodgers, Claire Nelder, Abigael Clough, Eleanor Pitt, Jacqui Parker, Lee Whiteside, Lucy Davies, Rachael Bailey, John McMahon, Hope Kolbe, Anthea Cree, Michael Dubec, Marcel Van Herk, Ananya Choudhury, Peter Hoskin, Cynthia Eccles

Research output: Contribution to journalArticlepeer-review


OBJECTIVES: Accurate image registration is vital in cervical cancer where changes in both planning target volume (PTV) and organs at risk (OARs) can make decisions regarding image registration complicated. This work aims to determine the impact of a dedicated educational tool compared with experience gained in MR-guided radiotherapy (MRgRT).

METHODS: 10 therapeutic radiographers acted as observers and were split into two groups based on previous experience with MRgRT and Monaco treatment planning system. Three CBCT-CT, three MR-CT and two MR-MR registrations were completed per patient by each observer. Observers recorded translations, time to complete image registration and confidence. Data were collected in two phases; prior to and following the introduction of a cervix registration guide.

RESULTS: No statistically significant differences were noted between imaging modalities. Each group was assessed independently pre- and post-education, no statistically significant differences were noted in either CBCT-CT or MR-CT imaging. Group 1 MR-MR imaging showed a statistically significant reduction in interobserver variability ( p=0.04), in Group 2, the result was not statistically significant ( p=0.06). Statistically significant increases in confidence were seen in all three modalities ( p≤0.05).

CONCLUSIONS: At The Christie NHS Foundation Trust, radiographers consistently registered images across three different imaging modalities regardless of their previous experience. The implementation of an image registration guide had limited impact on inter- and intraobserver variability. Radiographers' confidence showed statistically significant improvements following the use of the registration manual.

ADVANCES IN KNOWLEDGE: This work helps evaluate training methods for novel roles that are developing in MRgRT.

Original languageEnglish
Pages (from-to)20211402
JournalThe British journal of radiology
Publication statusE-pub ahead of print - 9 Jun 2022

Research Beacons, Institutes and Platforms

  • Manchester Cancer Research Centre


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