Triggered, navigated, multi‐baseline method for proton resonance frequency temperature mapping with respiratory motion

A technique is presented for the acquisition of temperature maps in the presence of variable respiratory motion using the proton resonance frequency (PRF) shift. The technique uses respiratory triggering, diaphragm position determination with a navigator echo, and the collection of multiple baseline images to generate temperature maps. Laser ablations were performed in an ex vivo liver phantom undergoing variable simulated respiratory motion and in vivo in four porcine livers, demonstrating a reduction of artifacts in the computed temperature maps compared with conventional single baseline techniques, both uncorrected and corrected for motion. Magn Reson Med 50:1003–1010, 2003. © 2003 Wiley‐Liss, Inc.

[1]  M Vogel Movement Registration for PRF Based MR Thermometry , 2002 .

[2]  J. Lewin,et al.  Invited. Interactive MRI‐guided radiofrequency interstitial thermal ablation of abdominal tumors: Clinical trial for evaluation of safety and feasibility , 1999, Journal of magnetic resonance imaging : JMRI.

[3]  K. Eichler,et al.  Percutaneous MR imaging-guided laser-induced thermotherapy of hepatic metastases , 2001, Abdominal Imaging.

[4]  K. Hynynen,et al.  Optimization of spoiled gradient‐echo phase imaging for in vivo localization of a focused ultrasound beam , 1996, Magnetic resonance in medicine.

[5]  R M Henkelman,et al.  Ex vivo tissue‐type independence in proton‐resonance frequency shift MR thermometry , 1998, Magnetic resonance in medicine.

[6]  J A de Zwart,et al.  On‐line correction and visualization of motion during MRI‐controlled hyperthermia , 2001, Magnetic resonance in medicine.

[7]  A Roggan,et al.  Internally cooled power laser for MR-guided interstitial laser-induced thermotherapy of liver lesions: initial clinical results. , 1998, Radiology.

[8]  F A Jolesz,et al.  MR imaging of laser-tissue interactions. , 1988, Radiology.

[9]  K. Kuroda,et al.  A precise and fast temperature mapping using water proton chemical shift , 1995, Magnetic resonance in medicine.

[10]  S J Riederer,et al.  Algorithms for extracting motion information from navigator echoes , 1996, Magnetic resonance in medicine.

[11]  M. Halliwell,et al.  Ultrasound quantitation of respiratory organ motion in the upper abdomen. , 1994, The British journal of radiology.

[12]  R C Grimm,et al.  Respiratory kinematics of the upper abdominal organs: A quantitative study , 1992, Magnetic resonance in medicine.

[13]  Angela Oatridge,et al.  Modeling and observation of temperature changes in Vivo using MRI , 1994, Magnetic resonance in medicine.

[14]  H C Thomas,et al.  MRI guidance of infra-red laser liver tumour ablations, utilising an open MRI configuration system: technique and early progress. , 1999, Journal of hepatology.

[15]  J. Poorter,et al.  Noninvasive MRI Thermometry with the Proton Resonance Frequency (PRF) Method: In Vivo Results in Human Muscle , 1995, Magnetic resonance in medicine.

[16]  H. Schwarzmaier,et al.  Laser‐induced interstitial thermotherapy of liver metastases in an interventional 0.5 Tesla MRI system: Technique and first clinical experiences , 2001, Journal of magnetic resonance imaging : JMRI.

[17]  J. Felmlee,et al.  Adaptive technique for high-definition MR imaging of moving structures. , 1989, Radiology.

[18]  H C Thomas,et al.  Ablative therapy for liver tumours , 2002, Gut.