A new criterion for motion estimation assessment for MR-thermometry applications

Sébastien Roujol (1) , Mario Ries (1) , Bruno Quesson (1) , Jenny Benois-Pineau (2) , Chrit Moonen (1) , Baudouin de Senneville (1)

1 Imagerie moléculaire et fonctionnelle: de la physiologie à la thérapie
2 Image et Son

Real time magnetic resonance (MR) thermometry provides continuous temperature mapping inside the human body and allows precise monitor and control of thermal therapies. An accurate motion estimation is required on mobile targets. However, the assessment of the estimated motion accuracy is difficult since the real target motion is unknown. In this paper, existing criteria based only on anatomical image similarity are demonstrated to be insufficient. A new criterion is introduced, which is based on the phase image similarity. The proposed criterion was evaluated on a moving phantom and compared to the real motion and established criteria based on anatomical image. It exhibits better consistency of motion estimation assessment.

Mots clés: Image registration; Magnetic resonance imaging; Motion analysis; Motion compensation

Domaines: Multimédia [cs.MM]

Sébastien Roujol, Mario Ries, Bruno Quesson, Jenny Benois-Pineau, Chrit Moonen, et al.. A new criterion for motion estimation assessment for MR-thermometry applications. 7th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI 2010, Apr 2010, Rotterdam, Netherlands. pp.1241-1244, ⟨10.1109/ISBI.2010.5490220⟩. ⟨hal-00572970⟩