Method and apparatus for rotation registration of extended field of view ultrasound images

2004 ◽  
Vol 115 (1) ◽  
pp. 27
Author(s):  
Fang F. Dong ◽  
Brian Peter Geiser
Keyword(s):  
Field Of View ◽  
Ultrasound Images ◽  
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 Evaluation of novel AI‐based extended field‐of‐view CT reconstructions

2021 ◽  
Author(s):  
Gabriel Paiva Fonseca ◽  
Matthias Baer‐Beck ◽  
Eric Fournie ◽  
Christian Hofmann ◽  
Ilaria Rinaldi ◽  
...  
Keyword(s):  
Field Of View ◽  
Extended Field ◽  
Extended Field Of View

Iterative extended field of view reconstruction

2007 ◽  
Author(s):  
Holger Kunze ◽  
Wolfgang Härer ◽  
Karl Stierstorfer
Keyword(s):  
Field Of View ◽  
Extended Field ◽  
View Reconstruction ◽  
Extended Field Of View

Does Extended-Field-of-View Sonography Improve Interrater Reliability for the Detection of Rotator Cuff Muscle Atrophy?

2008 ◽  
Vol 190 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Eoin C. Kavanagh ◽  
George Koulouris ◽  
Laurence Parker ◽  
William B. Morrison ◽  
Diane Bergin ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Muscle Atrophy ◽  
Interrater Reliability ◽  
Field Of View ◽  
Rotator Cuff Muscle ◽  
Extended Field ◽  
Extended Field Of View

scholarly journals Dynamics of cell and tissue growth acquired by means of extended field of view lensfree microscopy

2016 ◽  
Vol 7 (2) ◽  
pp. 512 ◽  
Author(s):  
F. Momey ◽  
J.-G. Coutard ◽  
T. Bordy ◽  
F. Navarro ◽  
M. Menneteau ◽  
...  
Keyword(s):  
Tissue Growth ◽  
Field Of View ◽  
Extended Field ◽  
Extended Field Of View

scholarly journals Intra- and inter-muscular differences in the cross-sectional area of the quadriceps muscles assessed by extended field-of-view ultrasonography

2020 ◽  
Vol 22 (2) ◽  
pp. 152 ◽  
Author(s):  
Chrysostomos Sahinis ◽  
Eleftherios Kellis ◽  
Nikiforos Galanis ◽  
Konstantinos Dafkou ◽  
Athanasios Ellinoudis
Keyword(s):  
Vastus Lateralis ◽  
Intraclass Correlation ◽  
Cross Sectional Area ◽  
Field Of View ◽  
Cost Evaluation ◽  
Sectional Area ◽  
Cross Sectional ◽  
Vastus Intermedius ◽  
Extended Field ◽  
Extended Field Of View

Aim: Τo examine the inter- and intra-muscular differences in the anatomical cross-sectional area (CSA) of the quadricep muscles, using extended - field of view (EFOV) ultrasonography (US).Material and methods: Panoramic transverse US images of the thigh were acquired from 10 young participants at five different locations across the thigh, in two sessions, spaced a week apart. The CSA of the vastus medialis (VM), rectus femoris (RF), vastus intermedius (VI), vastus lateralis (VL) and tensor vastus intermedius (TVI) was quantified.Results: The intraclass correlation coefficients ranged from 0.75 to 0.97 and the standard error of measurement ranged from 0.78% to 6.61%, indicating high test-retest reliability. Analysis of the variance indicated that among the 5 quadriceps muscles the VL and the RF displayed the greater CSA proximally, the VI medially and the VM distally across the thigh (p <0.05). No differences in the quadriceps CSA measured with and without including the TVI were found (p >0.05).Conclusions: The EFOV US technique provides transverse scans of the quadriceps muscle in vivo and allowed a reliable and non-invasive determination of CSA at a low cost. Evaluation of CSA along the thigh largely depends on the measurement site. Future studies that examine the quadriceps CSA using EFOV after any form of intervention should consider changes of at least 6.5% as meaningful.

scholarly journals Assessment of ct simulators used in radiotherapy treatment planning in Serbia, Croatia and Bosnia and Herzegovina

2021 ◽  
pp. 9-9
Author(s):  
Borislava Petrovic ◽  
Dario Faj ◽  
Mladen Markovic ◽  
Arpad Tot ◽  
Milana Marjanovic ◽  
...  
Keyword(s):  
Treatment Planning ◽  
Bosnia And Herzegovina ◽  
Field Of View ◽  
Radiotherapy Treatment Planning ◽  
Standard Field ◽  
Extended Field ◽  
The Mean ◽  
Ct Data ◽  
Radiotherapy Treatment ◽  
Extended Field Of View

The purpose of this work was to evaluate computed tomography (CT) simulators used in radiotherapy treatment planning in Serbia, Croatia and Bosnia and Herzegovina. A survey of quality assurance programmes of 24 CT simulators in 16 facilities was conducted. Dedicated CT-to-ED phantom was scanned at 120 kV and 140 kV, to obtain CT-to-ED (ED- Electron Density) conversion curves as well as CTDIvol. Thoracal phantoms were scanned in standard and extended field of view to evaluate dosimetric effect on treatment planning and delivery. Mean age of measured scanners was 5.5 years. The mean water HU value was -6.5 (all scanners, all voltages) and air HU value was -997. Extended field of view CT data differ from standard field of view and differences between conversion curves have significant dosimetric impact. The CTDI data showed large range of values between centers. Better QA of CT simulators in all countries is recommended. CT-to-ED curve could be used as default at one voltage and per manufacturer. Extended field of view imaging can be used, but treatment planning should be avoided in the regions out of standard field of view.

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