Acoustic radiation force impulse imaging of kidneys – a phantom study

Szymon Cygan , Magdalena Januszewicz

Abstract

Aim of the study: Since there have been only few works reporting the diagnosis of kidneys using Acoustic Radiation Force Impulse technique and those works do not provide consistent results of shear wave velocity measurements in renal tissue, we have decided to use kidney phantoms with known properties to examine the reliability of the method itself in a controlled setup similar to kidneys examination. Materials and methods: Four gelatin-based phantoms imitating different clinical situations were manufactured – two with thick and two with thin renal cortex, each type at a depth similar to a normal-weight or overweight patient. For each phantom, a series of interest points was chosen and for each point 20 Shear Wave Velocity measurements were taken using the build-in Virtual Touch Tissue QuantificationTM tool in a Siemens Acuson S2000 ultrasound scanner equipped with a 6C1 HD Transducer (Siemens Mountainview, USA). Results: Mean Shear Wave Velocity values obtained for all the examined points ranged from 2.445 to 3.941 m/s, with standard deviation exceeding 0.1 in only one case out of 29 points, but differing significantly between all points. Conclusions: The obtained results indicate that the method is highly reliable as long as the measurement volume contains a uniform tissue region. If the measurement window covers a region with different properties even partially, the obtained results are affected. The variance of measured values on the other hand is not affected by the said non-uniformity of material under examination. Furthermore, the variance of measured values does not show a clear dependency on the depth at which the shear wave velocities are measured.
Author Szymon Cygan IMIB
Szymon Cygan,,
- The Institute of Metrology and Biomedical Engineering
, Magdalena Januszewicz - [Medical University of Warsaw]
Magdalena Januszewicz,,
-
- Medical University of Warsaw
Journal seriesJournal of Ultrasonography, ISSN 2084-8404
Issue year2016
No16
Pages329-338
Publication size in sheets0.5
Keywords in Polishultrasonografia, ARFI, prędkość fali ścinającej, nerki, fantom
Keywords in Englishultrasonography, ARFI, shear wave velocity, kidney, phantom
Abstract in PolishZe względu na skąpość doniesień naukowych dotyczących diagnostyki nerek za pomocą elastografii impulsu mocy promieniowania akustycznego oraz niejednoznaczność prezentowanych wyników pomiarów prędkości propagacji fali ścinającej autorzy postanowili wykorzystać fizyczne modele tkankowe nerek w celu sprawdzenia wiarygodności samej metody w kontrolowanych warunkach, zbliżonych do panujących podczas diagnostyki tego narządu. Materiały i metody: Przygotowane zostały cztery fantomy żelatynowe odpowiadające różnym warunkom klinicznym – dwa o normalnej i dwa o cienkiej warstwie miąższowej, każdy na głębokości dostosowanej do pacjenta o normalnej budowie i otyłego.
DOIDOI:10.15557/JoU.2016.0033
URL http://jultrason.pl/index.php/issues/volume-16-no-67/acoustic-radiation-force-impulse-imaging-of-kidneys-a-phantom-study?aid=471
Languageen angielski
File
A1_Ultrasonography_67_Cygan.pdf 489.21 KB
Score (nominal)10
ScoreMinisterial score = 10.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 10.0, 28-11-2017, ArticleFromJournal
Citation count*1 (2018-07-13)
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