Evaluation of different magnetic resonance imaging contrast materials to be used as dummy markers in image-guided brachytherapy for gynecologic malignancies
| Autor: | Silvia Radwanski Stuart, Camila P. Sales, Heloisa de Andrade Carvalho, Bruno F. Pastorello, Laura Natal Rodrigues, Khallil Chaim Taverna, Arthur Felipe Borgonovi, Rodrigo A. Rubo |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Técnicas de diagnóstico obstétrico e ginecológico
lcsh:Medical physics. Medical radiology. Nuclear medicine Imaging three-dimensional medicine.medical_specialty Materials science media_common.quotation_subject lcsh:R895-920 Computed tomography Imagem por ressonância magnética/métodos Imaging phantom 030218 nuclear medicine & medical imaging Diagnostic techniques obstetrical and gynecological 03 medical and health sciences 0302 clinical medicine medicine Image guided brachytherapy Contrast (vision) Radiology Nuclear Medicine and imaging Magnetic resonance imaging/methods Braquiterapia/métodos media_common medicine.diagnostic_test Contrast media Magnetic resonance imaging Copper sulfate Original Articles Meios de contraste Imagem tridimensional Brachytherapy/methods 030220 oncology & carcinogenesis Radiology Signal intensity Biomedical engineering Olive oil |
| Zdroj: | Radiologia Brasileira v.49 n.3 2016 Radiologia Brasileira Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR) instacron:CBR Radiologia Brasileira, Vol 49, Iss 3, Pp 165-169 (2016) |
| Popis: | To identify a contrast material that could be used as a dummy marker for magnetic resonance imaging.Magnetic resonance images were acquired with six different catheter-filling materials-water, glucose 50%, saline, olive oil, glycerin, and copper sulfate (CuSO4) water solution (2.08 g/L)-inserted into compatible computed tomography/magnetic resonance imaging ring applicators placed in a phantom made of gelatin and CuSO4. The best contrast media were tested in four patients with the applicators in place.In T2-weighted sequences, the best contrast was achieved with the CuSO4-filled catheters, followed by saline- and glycerin-filled catheters, which presented poor visualization. In addition (also in T2-weighted sequences), CuSO4 presented better contrast when tested in the phantom than when tested in the patients, in which it provided some contrast but with poor identification of the first dwell position, mainly in the ring.We found CuSO4 to be the best solution for visualization of the applicator channels, mainly in T2-weighted images in vitro, although the materials tested presented low signal intensity in the images obtained in vivo, as well as poor precision in determining the first dwell position.Encontrar um material de contraste que possa ser utilizado como fonte falsa em imagens de ressonância magnética.Foram feitas imagens de ressonância magnética de cateteres preenchidos com seis meios de contraste conhecidos: água, glicose 50%, soro fisiológico, óleo de oliva, glicerina, solução aquosa de sulfato de cobre (CuSOOs cateteres preenchidos por CuSOO CuSO |
| Databáze: | OpenAIRE |
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