Magnetic Resonance Thermometry of Focused Ultrasound Using a Preclinical Focused Ultrasound Robotic System at 3T DOI Creative Commons
Antria Filippou, Nikolas Evripidou, Andreas Georgiou

и другие.

Journal of Medical Physics, Год журнала: 2024, Номер 49(4), С. 583 - 596

Опубликована: Окт. 1, 2024

Focused ultrasound (FUS) therapies are often performed within magnetic resonance imaging (MRI) systems providing thermometry-based temperature monitoring. Herein, MRI thermometry was assessed for FUS sonications executed using a preclinical system on agar-based phantoms at 1.5T and 3T scanners, the proton frequency shift technique. Sonications were to assess observe variations in (MR) measurements. MR 3T, identical three doped with varied silica evaporated milk concentrations, acoustic power of 1.5-45 W. Moreover, echo time (TE) values 5-20 ms used effect signal-to-noise ratio (SNR) change sensitivity. Clearer thermal maps 2.5-fold higher temporal resolution produced compared 1.5T, despite employment similar sequences. At changes between 41°C 50°C recorded milk, addition 2% w/v resulting 20% increase change. The lowest that reliable beam detection voxel 1.5 A TE 10 resulted highest sensitivity adequate SNR. achieved short dependencies exhibited sonication parameters. Present data could be MRI-guided feasibility studies enhance thermometry.

Язык: Английский

Magnetic Resonance Thermometry of Focused Ultrasound Using a Preclinical Focused Ultrasound Robotic System at 3T DOI Creative Commons
Antria Filippou, Nikolas Evripidou, Andreas Georgiou

и другие.

Journal of Medical Physics, Год журнала: 2024, Номер 49(4), С. 583 - 596

Опубликована: Окт. 1, 2024

Focused ultrasound (FUS) therapies are often performed within magnetic resonance imaging (MRI) systems providing thermometry-based temperature monitoring. Herein, MRI thermometry was assessed for FUS sonications executed using a preclinical system on agar-based phantoms at 1.5T and 3T scanners, the proton frequency shift technique. Sonications were to assess observe variations in (MR) measurements. MR 3T, identical three doped with varied silica evaporated milk concentrations, acoustic power of 1.5-45 W. Moreover, echo time (TE) values 5-20 ms used effect signal-to-noise ratio (SNR) change sensitivity. Clearer thermal maps 2.5-fold higher temporal resolution produced compared 1.5T, despite employment similar sequences. At changes between 41°C 50°C recorded milk, addition 2% w/v resulting 20% increase change. The lowest that reliable beam detection voxel 1.5 A TE 10 resulted highest sensitivity adequate SNR. achieved short dependencies exhibited sonication parameters. Present data could be MRI-guided feasibility studies enhance thermometry.

Язык: Английский

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