Investigation of the potential application of rhenium in medical imaging
Notice bibliographique
Résumé
Many thermodynamically stable coordination compounds have been synthesized using rhenium, a chemically versatile transition metal. Some of these rhenium complexes have been studied for utilization in nuclear medicine. However, many of their applications in medical imaging remain relatively unexplored and require further investigation. A comprehensive study was conducted in preclinical and clinical X-ray equipment to examine the use of rhenium as a contrast agent for X-ray imaging. Usually, there is a trade-off between image quality and radiation dose. This experimental work, along with theoretical Monte Carlo calculations, showed that it is feasible to preserve image quality and minimize radiation dose simultaneously when a rhenium-based formulation is utilized. This research provided thorough evidence of rhenium’s usefulness in X-ray imaging. Another application of rhenium was evaluated by producing a radiopaque, biodegradable electrospun scaffold containing a rhenium complex. Typically, catheterizations are performed under X-ray imaging guidance, but most catheters are radiolucent. After coating catheters with this scaffold, they became strongly radiopaque. Even a thin rhenium-doped coating has the potential of enhancing the contrast during catheterizations, which might be helpful in placing catheters more rapidly and precisely. Not only large medical devices, but also microsized carriers can be made radiopaque. An issue with embolic microspheres is their lack of contrast. To improve their visibility, potentially toxic contrast agents are co-administered in X-ray imaging-guided embolotherapy. Using a microfluidic technology, radiopaque, biodegradable microspheres made of a custom-synthesized polymer containing a rhenium complex were produced. Upon increasing the polymer’s rhenium concentration, these microspheres could be utilized in embolotherapy. Rhenium’s radioisotope Re¹⁸⁸ is a mixed beta and gamma emitter and can thus be exploited in another imaging modality: single photon emission computed tomography (SPECT). The biodistribution of microspheres labeled with Re¹⁸⁸ was evaluated in a hepatocellular carcinoma-bearing rat model. Although challenging in clinical practice, the radiation doses to the tumor and the healthy liver tissue were calculated. The radiation dose from the beta emissions yields these “imageable” microspheres theranostic, with quantifiable cancer radiotherapeutic potential. This work established the foundations to guide further research on the development of biodegradable devices doped with rhenium for medical imaging.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».