Effect of a Radiotherapeutic Megavoltage Beam on Ultrasound Contrast Agents

Gonzalo Collado-Lara*, Sophie V. Heymans, Jeremy Godart, Emiliano D'Agostino, Jan D'hooge, Koen Van Den Abeele, Hendrik J. Vos, Nico de Jong

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)


Collateral damage to healthy surrounding tissue during conventional radiotherapy increases when deviations from the treatment plan occur. Ultrasound contrast agents (UCAs) are a possible candidate for radiation dose monitoring. This study investigated the size distribution and acoustic response of two commercial formulations, SonoVue/Lumason and Definity/Luminity, as a function of dose on clinical megavoltage photon beam exposure (24 Gy). SonoVue samples exhibited a decrease in concentration of bubbles smaller than 7 µm, together with an increase in acoustic attenuation and a decrease in acoustic scattering. Definity samples did not exhibit a significant response to radiation, suggesting that the effect of megavoltage photons depends on the UCA formulation. For SonoVue, the influence of the megavoltage photon beam was especially apparent at the second harmonic frequency, and can be captured using pulse inversion and amplitude modulation (3.5-dB decrease for the maximum dose), which could eventually be used for dosimetry in a well-controlled environment.

Original languageEnglish
Pages (from-to)1857-1867
Number of pages11
JournalUltrasound in Medicine and Biology
Issue number7
Publication statusPublished - 1 Jul 2021


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