Targeted contrast agents for breast cancer imaging: A systematic review of nanoparticle, quantum dot, and ultrasound
1Khulna University of Engineering and Technology, Bangladesh; Chief Scientific Officer, HR Institute, Bangladesh.
Introduction:
Traditional imaging techniques for breast cancer often lack the molecular specificity required to differentiate tumor subtypes and guide targeted therapy. This systematic review aims to evaluate how emerging contrast agents specifically resolve the diagnostic limitations of conventional breast cancer imaging modalities.
Methods:
Following PRISMA guidelines, a systematic literature search was conducted across PubMed, Scopus, Web of Science, ScienceDirect, and Google Scholar for peer-reviewed articles published between January 2013 and March 2025. Inclusion criteria focused on targeted contrast agents with experimental validation in breast cancer models. After screening, 26 studies were included for qualitative synthesis.
Results:
From the synthesis of the 26 included articles, three primary themes emerged addressing modality limitations: nanoparticle platforms, quantum dot systems, and ultrasound contrast agents. The reviewed data demonstrates that nanoparticles and quantum dots overcome the low specificity of traditional MRI and CT by providing high molecular targeting for aggressive subtypes, such as TNBC and HER2-positive tumors. However, the clinical translation of these inorganic particles is limited by heavy metal toxicity and long-term bioaccumulation. Alternatively, targeted ultrasound lipid nanobubbles address the need for safer, non-ionizing real-time imaging, though they face limitations regarding short in vivo half-lives and variable stability.
Conclusion:
Targeted contrast agents offer significant advancements in diagnostic precision and theranostic potential over conventional breast imaging. To transition these technologies into clinical radiography practice, future research must prioritize the development of biodegradable, biosafe nanoplatforms to overcome current toxicity and accumulation barriers.
Implications For Practice:
The integration of targeted contrast agents will require radiographers to adapt to dynamic imaging protocols, manage novel patient safety profiles, and actively participate in ionizing radiation dose optimization utilizing high-attenuation materials.
Insights
Emerging targeted contrast agents enhance breast cancer imaging specificity, overcoming limitations of traditional methods. Future research should focus on developing safe, biodegradable nanoplatforms for clinical translation.
Area of Science:
- Biomedical Imaging
- Nanotechnology in Medicine
- Radiology
Background:
- Conventional breast cancer imaging lacks molecular specificity for targeted therapy.
- Differentiating tumor subtypes remains a challenge for current modalities.
Purpose of the Study:
- To evaluate emerging contrast agents for resolving diagnostic limitations in breast cancer imaging.
- To assess the potential of novel agents in improving tumor subtype differentiation and guiding therapy.
Main Methods:
- Systematic literature review following PRISMA guidelines (Jan 2013 - Mar 2025).
- Searched major scientific databases for targeted contrast agents in breast cancer models.
- Included 26 studies for qualitative synthesis.
Main Results:
- Nanoparticle and quantum dot platforms offer high molecular targeting for aggressive subtypes (e.g., TNBC, HER2-positive).
- These inorganic agents face challenges with heavy metal toxicity and bioaccumulation.
- Ultrasound contrast agents provide safer, non-ionizing imaging but have stability and half-life limitations.
Conclusions:
- Targeted contrast agents significantly advance diagnostic precision and theranostic potential.
- Development of biodegradable, biosafe nanoplatforms is crucial for clinical translation.
- Radiographers will need to adapt imaging protocols and safety measures for these new agents.
