Full acoustic and thermal characterization of HIFU field in the presence of a ribcage model

Rui Cao, Nhan Le, Ghulam Nabi, Zhihong Huang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    Abstract

    In the treatment of abdominal organs using high intensity focused ultrasound (HIFU), the patient's ribs are in the pathway of the HIFU beams which could result in acoustic distortion, occasional skin burns and insufficient energy delivered to the target organs. To provide full characterization of HIFU field with the influence of ribcage, the ribcage phantom reconstructed from a patient's CT images was created by tissue mimicking materials and its effect on acoustic field was characterized. The effect of the ribcage on acoustic field has been provided in acoustic pressure distribution, acoustic power and focal temperature. Measurement result shows focus splitting with one main focus and two secondary intensity maxima. With the presence of ribcage phantom, the acoustic pressure was reduced by 48.3% and another two peak values were observed near the main focus, reduced by 65.0% and 71.7% respectively. The acoustic power was decreased by 47.5% to 52.5%. With these characterization results, the form of the focus, the acoustic power, acoustic pressure and temperature rise are provided before the transcostal HIFU treatment, which are significant to determine the energy delivery dose. In conclusion, this ribcage model and characterization technique will be useful for the further study in the abdominal HIFU treatment.

    Original languageEnglish
    Title of host publicationProceedings from the 13th International Symposium on Therapeutic Ultrasound
    PublisherAIP Publishing
    Volume1816
    ISBN (Electronic)9780735414846
    DOIs
    Publication statusPublished - 1 Mar 2017
    Event13th International Symposium on Therapeutic Ultrasound, ISTU 2013 - Shanghai, China
    Duration: 12 May 201315 May 2013

    Conference

    Conference13th International Symposium on Therapeutic Ultrasound, ISTU 2013
    CountryChina
    CityShanghai
    Period12/05/1315/05/13

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  • Cite this

    Cao, R., Le, N., Nabi, G., & Huang, Z. (2017). Full acoustic and thermal characterization of HIFU field in the presence of a ribcage model. In Proceedings from the 13th International Symposium on Therapeutic Ultrasound (Vol. 1816). [020002] AIP Publishing. https://doi.org/10.1063/1.4976592