Clinical manifestations of the comet tail artifact.

Thickman, David; Ziskin, Marvin C.; Goldenberg, N J; Linder, B E

doi:10.7863/jum.1983.2.5.225

Cited by 74 publications

(36 citation statements)

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“…Comet-tail artifacts were first described by Wendell and Athey [11] and later studied in depth by Thickmann and Ziskin [12]. They are high-amplitude echoes that fan out from their source along the US beam like the tail of a comet.…”

Section: Discussionmentioning

confidence: 98%

Characterization of the normal pulmonary surface and pneumonectomy space by reflected ultrasound

Sperandeo

Varriale

Scionti

et al. 2011

Journal of Ultrasound

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KEYWORDSTransthoracic; Normal pleuropulmonary; Pneumonectomy space; Ultrasound artifacts.Abstract Interest has been increasing in the use of transthoracic ultrasound for the study of the pleuropulmonary disease. US imaging depends mainly on the physical interactions between ultrasound waves and the tissues being examined. In the thoracic region, the prescence of the chest wall and the air-containing pulmonary tissues cause various artifacts that strongly influence the resulting images. At the interface between tissues and air, the ultrasound beam is totally reflected and produces simple reverberation, comet-tail artifacts, and ring-down artifacts. We report the findings of transthoracic ultrasound in normal healthy subjects and in those who had undergone pneumonectomy.This experience shows that, in terms of the ultrasound artifacts mentioned above, the postpneumonectomy cavity is not significantly different from the healthy lung.Sommario SommarioL'interesse nell'utilità dell'ecografia del torace si è di recente accresciuto specialmente nello studio delle malattie pleuro-polmonari. L'immagine ecografica dipende prevalentemente dalle interazioni fisiche tra gli ultrasuoni e i tessuti esaminati; pertanto nello studio del torace la presenza della gabbia toracica e del tessuto polmonare contenente aria influenza fortemente le immagini generando molteplici artefatti. Il fascio ultrasonoro passando attraverso l'interfaccia tessuti/aria è quasi totalmente riflesso, producendo semplici riverberazioni (artefatti orizzontali), "comet-tail" e "ring-down" (artefatti verticali). Riportiamo gli effetti fisici implicati nella formazione di artefatti durante l'ecografia del torace in soggetti normali confrontati con lo spazio residuo post-pneumonectomia. In tutti i soggetti sani esaminati così come nella cavità residua dopo pneumonectomia abbiamo rilevato tutti gli artefatti descritti in accordo con i principi fisici degli ultrasuoni. ª

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Section: Discussionmentioning

confidence: 98%

Characterization of the normal pulmonary surface and pneumonectomy space by reflected ultrasound

Sperandeo

Varriale

Scionti

et al. 2011

Journal of Ultrasound

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“…The percentage of ultrasound reflected is defined by the equation 100(Z2 -Z1) 2 /(Z2 ? Z1) 2 , where Z1 and Z2 are the acoustic impedances of medium 1 and 2, respectively.…”

Section: áSecmentioning

confidence: 99%

Subcutaneous emphysema: ultrasound barrier

Verniquet¹,

Kakel²

2010

Can J Anesth/J Can Anesth

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“…The less reflective composition of concrete and wood were more attenuating and more echoic. This created a beam of decreased intensity characterized as shadowing artifacts (Thickman et al 1983). The comet tail artifacts in vitro corresponded to those in vivo with metal and glass.…”

Section: Discussionmentioning

confidence: 96%

“…The denser composition of glass and metal created multiple internal reflections creating a series of echoes expressed as multiple small bands characterized as comet tails (Thickman et al 1983). The less reflective composition of concrete and wood were more attenuating and more echoic.…”

Section: Discussionmentioning

confidence: 99%

Ultrasound biomicroscopic localization and evaluation of intraocular foreign bodies

Laroche

Ishikawa

Greenfield

et al. 1998

Acta Ophthalmologica Scandinavica

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ABSTRACT.Purpose: To evaluate the ultrasound biomicroscopic appearance of anterior segment foreign bodies under clinical and experimental conditions. Methods: Ultrasound biomicroscopy was performed on 4 eyes of 4 patients referred for evaluation of anterior segment trauma and known or suspected intraocular foreign body. Imaging of wood, aluminum, concrete, and glass foreign bodies was performed in the anterior chamber of a human cadaver eye. Results: Ultrasound biomicroscopy verified the location of a foreign body in two patients and identified occult foreign bodies in two others. Under clinical and experimental conditions, intraocular aluminum and glass produced comet tail artifacts. Under experimental conditions intraocular wood and concrete produced shadowing artifacts. Conclusion: Ultrasound biomicroscopy provides useful information in the evaluation of known and occult anterior segment foreign bodies. Ultrasound patterns of shadowing and comet tail may help differentiate foreign body materials.

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Clinical manifestations of the comet tail artifact.

Cited by 74 publications

References 0 publications

Characterization of the normal pulmonary surface and pneumonectomy space by reflected ultrasound

Characterization of the normal pulmonary surface and pneumonectomy space by reflected ultrasound

Subcutaneous emphysema: ultrasound barrier

Ultrasound biomicroscopic localization and evaluation of intraocular foreign bodies

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