Phase-change ultrasound contrast agents for proton range verification: towards an in vivo application Article Swipe
Bram Carlier
,
Sophie V. Heymans
,
Gonzalo Collado‐Lara
,
Luigi Musetta
,
Marcus Ingram
,
Yosra Toumia
,
Gaio Paradossi
,
Hendrik J. Vos
,
Tania Roskams
,
Jan D’hooge
,
Koen Van Den Abeele
,
Edmond Sterpin
,
Uwe Himmelreich
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1088/1361-6560/ad7e76
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1088/1361-6560/ad7e76
Objective. In proton therapy, range uncertainties prevent optimal benefit from the superior depth-dose characteristics of proton beams over conventional photon-based radiotherapy. To reduce these uncertainties we recently proposed the use of phase-change ultrasound contrast agents as an affordable and effective range verification tool. In particular, superheated nanodroplets can convert into echogenic microbubbles upon proton irradiation, whereby the resulting ultrasound contrast relates to the proton range with high reproducibility. Here, we provide a first in vivo proof-of-concept of this technology. Approach. First, the in vitro biocompatibility of radiation-sensitive poly(vinyl alcohol) perfluorobutane nanodroplets was investigated using several colorimetric assays. Then, in vivo ultrasound contrast was characterized using acoustic droplet vaporization (ADV) and later using proton beam irradiations at varying energies (49.7 MeV and 62 MeV) in healthy Sprague Dawley rats. A preliminary evaluation of the in vivo biocompatibility was performed using ADV and a combination of physiology monitoring and histology. Main results. Nanodroplets were non-toxic over a wide concentration range (<1 mM). In healthy rats, intravenously injected nanodroplets primarily accumulated in the organs of the reticuloendothelial system, where the lifetime of the generated ultrasound contrast (<30 min) was compatible with a typical radiotherapy fraction (<5 min). Spontaneous droplet vaporization did not result in significant background signals. Online ultrasound imaging of the liver of droplet-injected rats demonstrated an energy-dependent proton response, which can be tuned by varying the nanodroplet concentration. However, caution is warranted when deciding on the exact nanodroplet dose regimen as a mild physiological response (drop in cardiac rate, granuloma formation) was observed after ADV. Significance. These findings underline the potential of phase-change ultrasound contrast agents for in vivo proton range verification and provide the next step towards eventual clinical applications.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1088/1361-6560/ad7e76
- OA Status
- green
- Cited By
- 2
- References
- 40
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4402737034
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
-
https://openalex.org/W4402737034Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1088/1361-6560/ad7e76Digital Object Identifier
- Title
-
Phase-change ultrasound contrast agents for proton range verification: towards an in vivo applicationWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2024Year of publication
- Publication date
-
2024-09-23Full publication date if available
- Authors
-
Bram Carlier, Sophie V. Heymans, Gonzalo Collado‐Lara, Luigi Musetta, Marcus Ingram, Yosra Toumia, Gaio Paradossi, Hendrik J. Vos, Tania Roskams, Jan D’hooge, Koen Van Den Abeele, Edmond Sterpin, Uwe HimmelreichList of authors in order
- Landing page
-
https://doi.org/10.1088/1361-6560/ad7e76Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
-
https://hdl.handle.net/2078.1/294949Direct OA link when available
- Concepts
-
Contrast (vision), In vivo, Ultrasound, Range (aeronautics), Phase contrast microscopy, Phase (matter), Proton, Materials science, Nuclear magnetic resonance, Biomedical engineering, Medical physics, Physics, Medicine, Optics, Acoustics, Nuclear physics, Biology, Quantum mechanics, Biotechnology, Composite materialTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
2Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 2Per-year citation counts (last 5 years)
- References (count)
-
40Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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