High-resolution T2-weighted cervical cancer imaging: a feasibility study on ultra-high-field 7.0-T MRI with an endorectal monopole antenna

Jaap Hoogendam*, Irene van Kalleveen, Catalina Arteaga de Castro, AJE Raaijmakers, René H M Verheijen, Maurice A A J van Den Bosch, DWJ Klomp, RP Zweemer, Wouter B. Veldhuis

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Objectives: We studied the feasibility of high-resolution T2-weighted cervical cancer imaging on an ultra-high-field 7.0-T magnetic resonance imaging (MRI) system using an endorectal antenna of 4.7-mm thickness. Methods: A feasibility study on 20 stage IB1–IIB cervical cancer patients was conducted. All underwent pre-treatment 1.5-T MRI. At 7.0-T MRI, an external transmit/receive array with seven dipole antennae and a single endorectal monopole receive antenna were used. Discomfort levels were assessed. Following individualised phase-based B1 + shimming, T2-weighted turbo spin echo sequences were completed. Results: Patients had stage IB1 (n = 9), IB2 (n = 4), IIA1 (n = 1) or IIB (n = 6) cervical cancer. Discomfort (ten-point scale) was minimal at placement and removal of the endorectal antenna with a median score of 1 (range, 0–5) and 0 (range, 0–2) respectively. Its use did not result in adverse events or pre-term session discontinuation. To demonstrate feasibility, T2-weighted acquisitions from 7.0-T MRI are presented in comparison to 1.5-T MRI. Artefacts on 7.0-T MRI were due to motion, locally destructive B1 interference, excessive B1 under the external antennae and SENSE reconstruction. Conclusions: High-resolution T2-weighted 7.0-T MRI of stage IB1–IIB cervical cancer is feasible. The addition of an endorectal antenna is well tolerated by patients. Key Points: • High resolution T2-weighted 7.0-T MRI of the inner female pelvis is challenging• We demonstrate a feasible approach for T2-weighted 7.0-T MRI of cervical cancer• An endorectal monopole receive antenna is well tolerated by participants• The endorectal antenna did not lead to adverse events or session discontinuation

Original languageEnglish
Pages (from-to)938-945
Number of pages8
JournalEuropean Radiology
Volume27
Issue number3
DOIs
Publication statusPublished - Mar 2017

Keywords

  • Antenna
  • Feasibility studies
  • Magnetic resonance imaging
  • Neoplasm staging
  • Uterine cervical neoplasms

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