Piezoelectric-transducer-based miniature catheter for ultrahigh-speed endoscopic optical coherence tomography
نویسندگان
چکیده
We developed a piezoelectric-transducer- (PZT) based miniature catheter with an outer diameter of 3.5 mm for ultrahigh-speed endoscopic optical coherence tomography (OCT). A miniaturized PZT bender actuates a fiber and the beam is scanned through a GRIN lens and micro-prism to provide high-speed, side-viewing capability. The probe optics can be pulled back over a long distance to acquire three-dimensional (3D) data sets covering a large area. Imaging is performed with 11 μm axial resolution in air (8 μm in tissue) and 20 μm transverse resolution, at 960 frames per second with a Fourier domain mode-locked laser operating at 480 kHz axial scan rate. Using a high-speed data acquisition system, endoscopic OCT imaging of the rabbit esophagus and colon in vivo and human colon specimens ex vivo is demonstrated.
منابع مشابه
Ultrahigh speed endoscopic optical coherence tomography using micromotor imaging catheter and VCSEL technology
We developed a micromotor based miniature catheter with an outer diameter of 3.2 mm for ultrahigh speed endoscopic swept source optical coherence tomography (OCT) using a vertical cavity surface-emitting laser (VCSEL) at a 1 MHz axial scan rate. The micromotor can rotate a micro-prism at several hundred frames per second with less than 5 V drive voltage to provide fast and stable scanning, whic...
متن کاملCorrection of rotational distortion for catheter-based en face OCT and OCT angiography.
We demonstrate a computationally efficient method for correcting the nonuniform rotational distortion (NURD) in catheter-based imaging systems to improve endoscopic en face optical coherence tomography (OCT) and OCT angiography. The method performs nonrigid registration using fiducial markers on the catheter to correct rotational speed variations. Algorithm performance is investigated with an u...
متن کاملUltrahigh Speed Endoscopic Swept Source Optical Coherence Tomography using a VCSEL Light Source and Micromotor Catheter
We developed an ultrahigh speed endoscopic swept source optical coherence tomography (OCT) system for clinical gastroenterology using a vertical-cavity surface-emitting laser (VCSEL) and micromotor based imaging catheter, which provided an imaging speed of 600 kHz axial scan rate and 8 μm axial resolution in tissue. The micromotor catheter was 3.2 mm in diameter and could be introduced through ...
متن کاملEndoscopic Optical Coherence Elastography Using Acoustic Radiation Force and Bending Vibration of Optical Fiber
Optical coherence tomography (OCT) is an optical imaging technique that provides high-resolution cross-sectional image for clinical and biological field, and the OCT systems have a depth resolution of less than 10 m. Recently, measurement of hardness using endoscopic OCT is required . Fig. 1 Basic configuration of the endoscopic OCT-based elastography using the focusing transducer and bending v...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 2 شماره
صفحات -
تاریخ انتشار 2011