The purpose of this study was to compare in vitro pineapple juice and a solution of concentrated pineapple juice with a paramagnetic contrast agent in order to determine the feasibility of using the solution of concentrated pineapple juice in vivo for oesophagus visualisation at magnetic resonance angiography (MRA) before the radiofrequency catheter ablation procedure for atrial fibrillation. The pineapple juice was concentrated by a microwave heating evaporation process performed in a domestic microwave oven. Five grams of modified potato starch for every 40 mL of concentrated pineapple juice were added to the concentrated pineapple juice in order to thicken the solution. The solution resulted visually and quantitatively as hyperintense as the contrast agent in vitro (ratio = 1.02). in vivo, no technical difficulties were encountered during the MRA acquisition and a complete enhanced oesophagus was obtained in 37/38 patients (97.4%). The volumetric analysis and the three-dimensional reconstruction were feasible; the quality was rated as diagnostic in every patient. The intensified oesophagus was successfully merged into the electro-anatomical maps in all the patients. In summary, we demonstrated that this technique allows a feasible and safe oesophagus visualisation during MRA.

中文翻译：

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浓缩菠萝汁用于在房颤射频导管消融之前在磁共振血管造影期间可视化食道。

这项研究的目的是比较体外菠萝汁和浓菠萝汁与顺磁性造影剂的溶液，以确定在磁共振血管造影（MRA）中将浓菠萝汁溶液用于体内食道可视化的可行性。射频导管消融术前需进行房颤。通过在家用微波炉中进行的微波加热蒸发工艺浓缩菠萝汁。将每40毫升浓缩菠萝汁加入5克改性马铃薯淀粉，以浓缩溶液。该溶液在视觉和定量上均作为体外的造影剂表现为高强度（比率= 1.02）。在体内，MRA采集期间未遇到技术难题，并且在37/38例患者中获得了完全增强的食道（97.4％）。体积分析和三维重建是可行的；该质量被评定为每位患者的诊断水平。增强的食道已成功合并到所有患者的电解剖图中。总之，我们证明了该技术可在MRA期间实现可行且安全的食道可视化。