scholarly journals Extended field-of-view ultrathin microendoscopes with built-in aberration correction for high-resolution imaging with minimal invasiveness

2018 ◽  
Author(s):  
Andrea Antonini ◽  
Serena Bovetti ◽  
Claudio Moretti ◽  
Francesca Succol ◽  
Vijayakumar P Rajamanickam ◽  
...  
Keyword(s):  
Field Of View ◽  
Optical Aberrations ◽  
Spatiotemporal Resolution ◽  
Minimal Invasiveness ◽  
Novel Approach ◽  
Extended Field ◽  
Resolution Imaging ◽  
Aspherical Lenses ◽  
Extended Field Of View

We present a novel approach to correct optical aberrations in ultrathin gradient-index rod lens-based endoscopes using microfabricated aspherical lenses. Corrected microendoscopes have up to 9 folds larger field-of-view compared to uncorrected probes. Using extended field-of-view (eFOV) microendoscopes, we report two-photon imaging of GCaMP6 signals in the mouse hippocampus in vivo with unprecedented combination of high spatiotemporal resolution and minimal invasiveness.

scholarly journals In Vivo Cell Tracking and Cleared Tissue Imaging with Extended Field of View Selective Plane Illumination Microscopy

2019 ◽  
Vol 116 (3) ◽  
pp. 566a
Author(s):  
Leonardo A. Saunders ◽  
Devin Pace ◽  
Arianna Gentile ◽  
Dominik Stich ◽  
Angeles B. Ribera ◽  
...  
Keyword(s):  
Cell Tracking ◽  
Field Of View ◽  
Tissue Imaging ◽  
Selective Plane Illumination Microscopy ◽  
Extended Field ◽  
Extended Field Of View

In vivo assessment of muscle fascicle length by extended field-of-view ultrasonography

2010 ◽  
Vol 109 (6) ◽  
pp. 1974-1979 ◽  
Author(s):  
M. Noorkoiv ◽  
A. Stavnsbo ◽  
P. Aagaard ◽  
A. J. Blazevich
Keyword(s):  
Intraclass Correlation ◽  
Field Of View ◽  
Absolute Difference ◽  
Linear Extrapolation ◽  
Fascicle Length ◽  
Digital Photographs ◽  
Muscle Fascicle ◽  
Extended Field ◽  
Extended Field Of View

The present study examined the reliability and validity of in vivo vastus lateralis (VL) fascicle length ( Lf) assessment by extended field-of-view ultrasonography (EFOV US). Intraexperimenter and intersession reliability of EFOV US were tested. Further, Lf measured from EFOV US images were compared to Lf measured from static US images (6-cm FOV) where out-of-field fascicle portions were trigonometrically estimated (linear extrapolation). Finally, spatial accuracy of the EFOV technique was assessed by comparing Lf measured on swine VL by EFOV US to actual measurements from digital photographs. The difference between repeated VL Lf measurements by the same experimenter was 2.1 ± 1.7% with an intraclass correlation (ICC) of 0.99 [95% confidence interval (CI) = 0.95–1.00]. In terms of intersession reliability, no difference ( P = 0.48) was observed between Lf measured on two different occasions, with ICC = 0.95 (CI = 0.80–0.99). The average absolute difference between Lf measured by EFOV US and using linear extrapolation was 12.6 ± 8.1% [ICC = 0.76 (CI = −0.20–0.94)]; EFOV Lf was always longer than extrapolated Lf. The relative error of measurement between Lf measured by EFOV US and by dissective assessment (digital photographs) in isolated swine VL was 0.84% ± 2.6% with an ICC of 0.99 (CI = 0.94–1.00). These results show that EFOV US is a reliable and valid method for the measurement of long muscle fascicle in vivo. Thus EFOV US analysis was proven more accurate for the assessment of skeletal muscle fascicle length than conventional extrapolation methods.

scholarly journals Demonstration of extended field-of-view ultrasound’s potential to increase the pool of muscles for which in vivo fascicle length is measurable

2017 ◽  
Vol 63 ◽  
pp. 179-185 ◽  
Author(s):  
Amy N. Adkins ◽  
Patrick W. Franks ◽  
Wendy M. Murray
Keyword(s):  
Field Of View ◽  
Fascicle Length ◽  
Extended Field ◽  
Extended Field Of View

scholarly journals 3D extended field-of-view of the knee joint bones using ultrasound: Application in orthopaedics

10.29007/p1zn ◽  
2019 ◽  
Author(s):  
Maged Nasan ◽  
Yannick Morvan ◽  
Guillaume Dardenne ◽  
Jean Chaoui ◽  
Eric Stindel
Keyword(s):  
Knee Joint ◽  
False Positive Rate ◽  
Field Of View ◽  
Patient Specific ◽  
Ultrasound Images ◽  
Registration Method ◽  
Extended Field ◽  
Extended Field Of View

Patient Specific Instruments (PSIs) have been introduced into the surgical workflow as a modern way to assist the surgeon in performing femur and tibia resection in Total Knee Arthroplasty (TKA). These PSIs are based on an accurate reconstruction of the surface of the knee’s bones.In this work, we propose two 3D-3D image-based registration methods to reconstruct an extended field-of-view of the knee joint using only a motorized ultrasound transducer. Those methods are: (1) a dense voxel-based registration method, which needs to preprocess the ultrasound images and form an ultrasound volume. Then, computing the Mutual Information (MI) for each relative displacement to align every pair of volumes, (2) a sparse point-based registration method, which takes into account the point set located on the surface of the bone in ultrasound images. This method detects bony features using ORB detector and matches the corresponding points to find the best transformation using Coherent Point Drift (CPD).The preliminary qualitative results performed in vitro show that from a set of consecutive ultrasound volumes, an extended field-of-view can be reconstructed using only ultrasound images without any external trackers. Results of the voxel-based approach show that MI is more robust against noise comparing to other similarity measures. On the other hand, results of point-based approach show that is much faster in computation with a low false-positive rate compared to other feature-detectors like SIFT and SURF. Furthermore, experiments show that CPD is less affected by noisy data compared to the classical ICP, which is promising to continue evaluating our work in vivo.

scholarly journals In vivo measurements of biceps brachii and triceps brachii fascicle lengths using extended field-of-view ultrasound

2016 ◽  
Vol 49 (9) ◽  
pp. 1948-1952 ◽  
Author(s):  
Christa M. Nelson ◽  
Julius P.A. Dewald ◽  
Wendy M. Murray
Keyword(s):  
Biceps Brachii ◽  
Field Of View ◽  
Triceps Brachii ◽  
In Vivo Measurements ◽  
Extended Field ◽  
Extended Field Of View

First phantom and in vivo MPI images with an extended field of view

2011 ◽  
Author(s):  
I. Schmale ◽  
J. Rahmer ◽  
B. Gleich ◽  
J. Kanzenbach ◽  
J. D. Schmidt ◽  
...  
Keyword(s):  
Field Of View ◽  
Extended Field ◽  
Extended Field Of View

scholarly journals Author response: Extended field-of-view ultrathin microendoscopes for high-resolution two-photon imaging with minimal invasiveness

2020 ◽  
Author(s):  
Andrea Antonini ◽  
Andrea Sattin ◽  
Monica Moroni ◽  
Serena Bovetti ◽  
Claudio Moretti ◽  
...  
Keyword(s):  
High Resolution ◽  
Field Of View ◽  
Author Response ◽  
Minimal Invasiveness ◽  
Two Photon ◽  
Extended Field ◽  
Photon Imaging ◽  
Two Photon Imaging ◽  
Extended Field Of View

Extended Field Of View (EFOV) in Gynäkologie und Geburtshilfe

2004 ◽  
Vol 207 (S 2) ◽  
Author(s):  
W Henrich ◽  
JW Dudenhausen
Keyword(s):  
Field Of View ◽  
Extended Field ◽  
Extended Field Of View
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