کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4977320 1451898 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fiber-optic annular detector array for large depth of field photoacoustic macroscopy
ترجمه فارسی عنوان
آرایه آشکارساز حلقوی فیبر نوری برای عمق میدان عمق میدان مغناطیسی ماکروسیته
کلمات کلیدی
تصویربرداری تصویربرداری، ماکروسکوپ فوتوکوسیت، تداخل سنجی، تصویربرداری فیبر نوری، تشخیص اولتراسوند نوری،
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
چکیده انگلیسی

We report on a novel imaging system for large depth of field photoacoustic scanning macroscopy. Instead of commonly used piezoelectric transducers, fiber-optic based ultrasound detection is applied. The optical fibers are shaped into rings and mainly receive ultrasonic signals stemming from the ring symmetry axes. Four concentric fiber-optic rings with varying diameters are used in order to increase the image quality. Imaging artifacts, originating from the off-axis sensitivity of the rings, are reduced by coherence weighting. We discuss the working principle of the system and present experimental results on tissue mimicking phantoms. The lateral resolution is estimated to be below 200 μm at a depth of 1.5 cm and below 230 μm at a depth of 4.5 cm. The minimum detectable pressure is in the order of 3 Pa. The introduced method has the potential to provide larger imaging depths than acoustic resolution photoacoustic microscopy and an imaging resolution similar to that of photoacoustic computed tomography.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Photoacoustics - Volume 5, March 2017, Pages 1-9
نویسندگان
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