Integrated treatment head for HIFU therapy in MRI
Original Publication Date: 2001-Dec-01
Included in the Prior Art Database: 2003-Jul-23
Colette Charbonnier: AUTHOR [+7]
High Intensity Focussed Ultrasound (HIFU) is a therapy that enables to perform cancer surgery by localised heating of the tumour. The tumour tissues are burnt by focussed ultrasound waves. A transducer emits these ultrasound waves. On the other hand Magnetic Resonance Imaging (MRI) is a diagnostic tool to visualise cancer tu- mours. MRI employs large magnets for creating a homogeneous magnetic field and gradients coils for creating magnetic field gradients. These adjustments of the fields enable to select which tissue slices will be imaged.
Integrated treatment head forHIFU therapy in MRI
Idee: Colette Charbonnier, F-Villeurbanne;
Robert Nemeth, A-Gross St. Florian;Jianmin Wang, Erlangen;Jürgen Jenne, Mannheim;Robert Zachmann, Forchheim;Frank Supplieth, Fürth;Andreas Speck, Möhrendorf
High Intensity Focussed� Ultrasound� (HIFU)� is� atherapy� that� enables� to� perform� cancer surgery bylocalised heating of the tumour. The tumour tissuesare burnt by focussed ultrasound waves. A transduceremits these ultrasound waves.
On� the� other� hand Magnetic Resonance Imaging(MRI) is a diagnostic� tool� to� visualise� cancer� tu-mours. MRI employs large� magnets� for� creating� ahomogeneous magnetic field and gradients coils forcreating magnetic field gradients. These adjustmentsof the fields enable to select which tissue slices willbe imaged.
MR imaging also employs radiofrequency (RF) coilsin order to apply an RF field causing the tissue toresonate and create an MR response signal. The MRresponse signal is captured by a receiver coil, whichtransmits it to a processing unit and so generates animage.
MRI is useful in planning HIFU procedures. Moreo-ver, a view of the region heated by HIFU is providedwith the use of MR temperature sensitive pulse se-quences. Finally, MRI distinguishes between viableand treated tissue.
The idea presented here provides a system that en-ables to perform surgery by HIFU under MRI moni-toring. Especially, it is an integrated treatment unitfor breast cancer HIFU therapy in MRI.
This unit, that can fit in any MR magnet having asliding table to hold the subject, includes all the ele-ments which are necessary for the treatment like atransducer that delivers the ultrasound waves, a me-chanical system to move the transducer in order toscan a tumour with the focal point and to treat a vol-ume of tumour, and an MRI receiver coil in order toaquire images of the treated area with the best signal-to-noise ratio (SNR...