Journal: Medical physics
Article Title: Technical Note: Effect of transducer position and ground plane configuration on image quality in MR-guided focused ultrasound therapies
doi: 10.1002/mp.14138
Figure Lengend Snippet: The breast-specific MRgFUS system used in this work. (a) Top-view of the treatment cylinder, designed to be placed on the table of a clinical MRI scanner. The integrated RF coil and laterally-mounted ultrasound phased-array transducer are indicated. (b) 3D model of the ultrasound transducer. 256 4-mm diameter elements are semi-randomly placed on the transducer face. A solid conductive ground plane is used in this design. Aperture is 14.5 × 8 cm with a 10 cm radius of curvature. (c) The 8-channel RF MRI receive coil integrated into the treatment cylinder shown in (a). The coil consists of a 6-channel ladder array with additional loops placed at the chest wall and around the transducer opening. (d) Top and (e) side schematic views of the breast MRgFUS system. Three rotation angles (Ψ, α, θ) and three translation distances (Xgantry, Zgantry, Xslide) are indicated as well as the θ=0° and 90° locations and direction of B0. Ψ is measured from the horizontal.
Article Snippet: A replica 3D printed plastic transducer (ABS, Hatchbox; Monoprice Maker Ultimate 3D printer) was laterally mounted in the X slide = 50mm position, close to the transducer coil loop, where it would cause the greatest RF eddy currents.
Techniques: