Exposimetry of unfocused pulsed ultrasound |
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| Authors: | Xiaohui Zhang Harrison GH Balcer-Kubiczek EK |
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| Affiliation: | Dept. of Radiat. Oncology, Maryland Univ. Sch. of Med., Baltimore, MD; |
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| Abstract: | Therapeutic applications of unfocused pulsed ultrasound have recently been identified and require specialized exposimetry. Spatial distributions of pressure and several measures of intensity are presented for an unfocused pulsed ultrasound field produced by a PZT-4 transducer with diameter 3.8 cm and center frequency 2 MHz. Distributions of pressure Itp and Im were adequately uniform over a 4-cm2 area in a transverse plane at an axial distance of 7 cm, but not so for Ita and Ipa , which both exhibited off-axis asymmetric maxima |
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