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- W2155165720 abstract "This simulation study proposes a noninvasive, transesophageal cardiac-thermal ablation using a planar ultrasound phased array (1 MHz, 60 /spl times/ 10 mm/sup 2/, 0.525 mm interelement spacing, 114 /spl times/ 20 elements). Thirty-nine foci in cardiac muscle were defined at 20, 40, and 60-mm distances and at various angles from the transducer surface to simulate the accessible posterior left atrial wall through the esophageal wall window. The ultrasound pressure distribution and the resulting thermal effect in a volume of 60 /spl times/ 80 /spl times/ 80 mm/sup 3/, including esophagus and cardiac muscle, were simulated for each focus. For 1, 10, and 20-s sonications with 60/spl deg/C and 70/spl deg/C peak temperatures in cardiac muscle and without thermal damage in esophageal wall, the transducer acoustic powers were 105-727, 28-117, 21-79 W and 151-1044, 40-167, 30-114 W, respectively. The simulated lesions (thermal dose in equivalent minutes at 43/spl deg/C /spl ges/240 minutes) at these foci had lengths of 1-6, 3-11, 3-13 mm and 3-15, 5-19, 6-23 mm, respectively, and widths of 1-4, 2-7, 3-9 mm and 3-9, 4-13, 4-17 mm, respectively. As a first step toward feasibility, controllable tissue coagulation in cardiac tissue without damage to the esophagus was demonstrated numerically." @default.
- W2155165720 created "2016-06-24" @default.
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- W2155165720 date "2006-06-01" @default.
- W2155165720 modified "2023-10-11" @default.
- W2155165720 title "Noninvasive transesophageal cardiac thermal ablation using a 2-D focused, ultrasound phased array: a simulation study" @default.
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- W2155165720 doi "https://doi.org/10.1109/tuffc.2006.1642512" @default.
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