PHOTOSENSITIZER PARTICLES FOR MEDICAL IMAGING AND/OR PHOTODYNAMIC THERAPY
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United States of America Patent
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Mar 24, 2016
app pub date -
May 16, 2014
filing date -
May 18, 2013
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Abstract
Disclosed herein are photosensitizer particle contrast agents suitable for medical imaging and/or photodynamic therapy. The photosensitizer particle contrast agent has a shell and a core encased by the shell. The shell consists essentially of multiple photosensitizer conjugates. Each photosensitizer conjugate consists of a photosensitizer and at least one biodegradable polymer covalently bound to the photosensitizer. According to certain examples, the core has an echogenic contrast-enhancing material loaded therein. In alternative examples, the photosensitizer of at least one of the multiple photosensitizer conjugates has a magnetic contrast-enhancing agent, e.g., a paramagnetic ion, chelated thereto. Also disclosed herein are methods for medical imaging which use imaging compositions containing the photosensitizer particle contrast agents taught in the present disclosure.
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