Assessment of Rectus Abdominis muscle thickness during isometric trunk and leg lifting exercises using extended field of view (EFOV) ultrasound

2020 ◽  
Vol 22 (4) ◽  
pp. 430
Author(s):  
Konstantinos Dafkou ◽  
Eleftherios Kellis ◽  
Athanasios Ellinoudis ◽  
Chrysostomos Sahinis ◽  
Nikiforos Galanis
Keyword(s):  
Diagnostic Tool ◽  
Muscle Thickness ◽  
Distal Segment ◽  
Rectus Abdominis ◽  
Field Of View ◽  
Rectus Abdominis Muscle ◽  
Extended Field ◽  
Length Changes ◽  
Type Of Exercise ◽  
Extended Field Of View

Aim: The purpose of the present study was to establish which type of exercise is optimal for Rectus Abdominis (RA) muscle, by measuring thickness and length changes using the extended field of view ultrasonography (EFOV US) during different conditions. The second purpose was to estimate the reliability of EFOV US as a muscle morphology assessment tool.Material and methods: Segmental muscle thickness and length of 11 young healthy adults was assessed during 1) rest and isometric 2) trunk lifting, 3) leg lifting and 4) combined trunk and leg lifting exercises with the use of EFOV US.Results: RA muscle thickness was significantly greater during exercises compared to rest (p<0.05). It was also observed that proximal and proximal-middle segments showed significantly less thickness and length compared to distal-middle and distal segments (p<0.05). Even though no differences in thickness were observed between the exercises, leg lifting and combined trunk and leg lifting exercises affected more the distal segment of RA muscle (p<0.05). Moreover, no significant differences in length between exercises was found (p>0.05). Further, EFOV US displayed excellent reliability as the ICC values ranged from 0.82 to 0.97.Conclusions: According to our observations it seems that exercises that induce lifting of the legs might be more effective for the distal parts of RA muscle. EFOV appears to be a reliable diagnostic tool for measuring RA muscle thickness during rest and contracting states.

Variability of Regional Quadriceps Architecture in Trained Men Assessed by B-Mode and Extended-Field-of-View Ultrasonography

2020 ◽  
Vol 15 (3) ◽  
pp. 430-436 ◽  
Author(s):  
Dustin J. Oranchuk ◽  
André R. Nelson ◽  
Adam G. Storey ◽  
John B. Cronin
Keyword(s):  
Vastus Lateralis ◽  
Intraclass Correlation ◽  
Muscle Thickness ◽  
Rectus Femoris ◽  
Field Of View ◽  
Fascicle Length ◽  
Large Variability ◽  
Extended Field ◽  
Extended Field Of View ◽  
Regional Muscle

Purpose: Regional muscle-architecture measures are reported widely; however, little is known about the variability of these measurements in the rectus femoris, vastus lateralis, and anterior and lateral vastus intermedius. The aim of this study was to quantify this variability. Methods: Regional muscle thickness, pennation angle (PA), and calculated and extended-field-of-view–derived fascicle length (FL) were quantified in 26 participants using ultrasonography across 51 limbs on 3 occasions. To quantify variability, the typical error of measurement (TEM) was multiplied by 2, and thresholds of 0.2–0.6 (small), 0.6–1.2 (moderate), 1.2–2.0 (large), 2.0–4.0 (very large), and >4.0 (extremely large) were applied. In addition, variability was deemed large when the intraclass correlation coefficient (ICC) was <.67 and coefficient of variation (CV) >10%, moderate when ICC > .67 or CV < 10% (but not both), and small when both ICC > .67 and CV < 10%. Results: Muscle thickness of all muscles and regions had low to moderate variability (ICC = .88–.98, CV = 2.4–9.3%, TEM = 0.15–0.47). PA of the proximal and distal vastus lateralis had low variability (ICC = .85–.96, CV = 3.8–8%) and moderate to large TEM (TEM = 0.42–0.83). PA of the rectus femoris was found to have moderate to very large variability (ICC = .38–.74, CV = 11.4–18.5%, TEM = 0.61–1.29) regardless of region. Extended-field-of-view–derived FL (ICC = .57–.94, CV = 4.1–11.5%, TEM = 0.26–0.88) was superior to calculated FL (ICC = .37–.84, CV = 7.4–17.9%, TEM = 0.44–1.33). Conclusions: Variability of muscle thickness was low in all quadriceps muscles and regions. Only rectus femoris PA and FL measurements were highly variable. The extended-field-of-view technique should be used to assess FL where possible. Inferences based on rectus femoris architecture should be interpreted with caution.

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

Electromyographic and ultrasonographic evaluation of neuromuscular electrical stimulation training on the equine rectus abdominis muscle

2020 ◽  
Vol 16 (2) ◽  
pp. 87-100
Author(s):  
T. Hernández-Fernández ◽  
L. Gutiérrez-Cepeda ◽  
J. López-Sanromán ◽  
G. Manso-Díaz ◽  
R. Cediel
Keyword(s):  
Electrical Stimulation ◽  
Muscle Force ◽  
Neuromuscular Electrical Stimulation ◽  
Muscle Thickness ◽  
Muscular Contraction ◽  
Rectus Abdominis ◽  
Wilcoxon Test ◽  
Median Frequency ◽  
Rectus Abdominis Muscle ◽  
Test Analysis

The current study aimed to determine the effects of neuromuscular electrical stimulation (NMES) on equine rectus abdominis using surface electromyography (sEMG) and ultrasonographic muscle thickness evaluation. Five horses were trained with NMES for 12 weeks; muscle thickness and sEMG evaluations were obtained before and after the training period. Three different tests were carried out for sEMG evaluations: Test A tried to elicit a voluntary maximal isometric contraction (VMIC); Test B used NMES to elicit a muscular contraction; and Test C used 1 ms repetitive electrical impulses to elicit a series of M-waves. Muscle strength was evaluated from the root mean square (RMS; Tests A and B) and peak to peak (PP; Test C) values obtained from the sEMG data. Measures related to amplitude (RMSa; RMSm; RMSa; PP) were normalised with their pre-training values for every muscle prior to statistical analysis, leading to values as a proportion of the initial value. The evaluation of muscle fatigue was performed using a Fourier test analysis of the frequency range, obtaining the median frequency (MF) for all tests. Muscle thickness (MT) was measured by ultrasound of left and right sides of the rectus abdominis. Data were analysed using non parametric test of Wilcoxon (Test A RMSa; Test A RMSm; Test B RMSa; Test B RMSm; Test C PP; MT; P<0.05) and t-test (Test A MF; Test B MF; Test C MF; P<0.05). Statistical differences were observed between baseline and trained horses. Muscle force increase following NMES training in Test B (RMSa 2.50±0.69; RMSm 2.59±0.76) and Test C (PP 5.20±1.76). Fatigue of the rectus abdominis decreased in Test A (168.33±55.19 vs 232.63±44.15 Hz) and Test C MF (187.93±20.76 vs 236.98±52.39 Hz), but not in Test B (363.98±45.48 vs 327.95±50.84 Hz). The difference in muscle thickness between the two groups was not significant (10.96±0.64; 11.78±0.79 mm). The results suggest that NMES training could be used as an effective method to increase muscle force and fatigue resistance of the rectus abdominis muscle in the horse.

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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