Methods of measuring the performance of ultrasonic pulse-echo diagnostic equipment

Brendel, Klaus; Filipczyński, L.; Gerstner, Richard; Hill, Christopher; Kossoff, G.; Quentin, G.; Reid, John M.; Saneyoshi, J.; Somer, J. C.; Tchevnenko, A.A.; Wells, P.N.T.

doi:10.1016/0301-5629(77)90040-0

Cited by 35 publications

(6 citation statements)

References 8 publications

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“…Performance evaluation of an ultrasonic diagnostic equipment is done on differnt levels of test equipment [1,2]. For the measurements, which are to be described here, we used a specialized signal generator.…”

Section: Literaturmentioning

confidence: 99%

Performance Evaluation of the Ocuscan 400 with the ECHOSIMULATOR. Darstellung von Qualitätsmerkmalen des Ocuscan 400 mittels ECHOSIMULATOR

Reuter¹,

Lepper²,

Haigis³

1980

Biomedizinische Technik/Biomedical Engineering

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Section: Literaturmentioning

confidence: 99%

Performance Evaluation of the Ocuscan 400 with the ECHOSIMULATOR. Darstellung von Qualitätsmerkmalen des Ocuscan 400 mittels ECHOSIMULATOR

Reuter¹,

Lepper²,

Haigis³

1980

Biomedizinische Technik/Biomedical Engineering

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“…There are many methods and recommendations on how to carry out performance tests and quality control on ultrasound systems 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. The transducer is a vital part of the system and handled daily.…”

Section: Introductionmentioning

confidence: 99%

Method for automatic detection of defective ultrasound linear array transducers based on uniformity assessment of clinical images — A case study

Lorentsson

Hosseini

Johansson

et al. 2018

J Applied Clin Med Phys

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The purpose of the present study was to test an idea of and describe a concept of a novel method of detecting defects related to horizontal nonuniformities in ultrasound equipment. The method is based on the analysis of ultrasound images collected directly from the clinical workflow. In total over 31000 images from three ultrasound scanners from two vendors were collected retrospectively from a database. An algorithm was developed and applied to the images, 150 at a time, for detection of systematic dark regions in the superficial part of the images. The result was compared with electrical measurements (FirstCall) of the transducers, performed at times when the transducers were known to be defective. The algorithm made similar detection of horizontal nonuniformities for images acquired at different time points over long periods of time. The results showed good subjective visual agreement with the available electrical measurements of the defective transducers, indicating a potential use of clinical images for early and automatic detection of defective transducers, as a complement to quality control.

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“…The density, sound speed, and nonlinearity coefficient should be representative of human soft tissues. To determine spatial resolution, particularly lateral resolution, it was recommended to use a spherical tungsten carbide test object, which could be mounted on rods or wires in water [19]. This was written for A-mode, but could be duplicated in B-mode.…”

Section: Introductionmentioning

confidence: 99%

“…The upper restriction on the allowable ball size for the apparent target to be acoustically small was established to be d < 1.22λ F 2 , where d , λ, and F are target diameter, acoustic wavelength, and transducer f-number, respectively [19]. A lower bound of d >5 [mm/µs]/ f was placed on target size to minimize strong variations in the frequency dependence of target reflectivity for tungsten carbide in water [20], where f is the working frequency in megahertz and d is given in millimeters.…”

Section: Introductionmentioning

confidence: 99%

A tissue-mimicking ultrasound test object using droplet vaporization to create point targets

Carneal

Kripfgans

Krücker

et al. 2011

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Ultrasound test objects containing reference point targets could be useful for evaluating ultrasound systems and phase aberration correction methods. Polyacrylamide gels containing albumin-stabilized droplets (3.6 µm mean diameter) of dodecafluoropentane (DDFP) are being developed for this purpose. Perturbation by ultrasound causes spontaneous vaporization of the superheated droplets to form gas bubbles, a process termed acoustic droplet vaporization (ADV). The resulting bubbles (20 to 160 µm diameter) are small compared with acoustic wavelengths in diagnostic ultrasound and are theoretically suitable for use as point targets (phase errors <20° for typical f-numbers). Bubbles distributed throughout the material are convenient for determining the point spread function in an imaging plane or volume. Cooling the gel causes condensation of the DDFP droplets, which may be useful for storage. Studying ADV in such viscoelastic media could provide insight into potential bioeffects from rapid bubble formation.

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Methods of measuring the performance of ultrasonic pulse-echo diagnostic equipment

Cited by 35 publications

References 8 publications

Performance Evaluation of the Ocuscan 400 with the ECHOSIMULATOR. Darstellung von Qualitätsmerkmalen des Ocuscan 400 mittels ECHOSIMULATOR

Performance Evaluation of the Ocuscan 400 with the ECHOSIMULATOR. Darstellung von Qualitätsmerkmalen des Ocuscan 400 mittels ECHOSIMULATOR

Method for automatic detection of defective ultrasound linear array transducers based on uniformity assessment of clinical images — A case study

A tissue-mimicking ultrasound test object using droplet vaporization to create point targets

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