The comet tail artifact.

Ziskin, Marvin C.; Thickman, David; Goldenberg, N J; Lapayowker, Marc S.; Becker, J.M.

doi:10.7863/jum.1982.1.1.1

Cited by 182 publications

(101 citation statements)

References 1 publication

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“…A hyperechoic comet-tail artifact secondary to reverberations inside the dense echogenic foreign body was visualized in three cases (Figs. 2 and 3) [3,4]. In seven cases a surrounding hypoechoic mass ranging from 1 .2 to 3 cm in diameter correlated well with inflammatory changes found at surgery (Fig.…”

Section: Eight Foreignsupporting

confidence: 63%

Sonographic diagnosis of foreign bodies of the distal extremities

Fornage

Schernberg

1986

American Journal of Roentgenology

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Section: Eight Foreignsupporting

confidence: 63%

Sonographic diagnosis of foreign bodies of the distal extremities

Fornage

Schernberg

1986

American Journal of Roentgenology

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“…These narrow repetition artifacts are known as ring-down artifacts 7,8 or comet-tail artifacts. 9,10 In the present study, various pulmonary diseases showed ring-down artifacts on ultrasonography. When the parenchymal abnormalities seen in the right lung base were extensive (especially in the patients of groups 2 and 3), the ring-down artifacts were obtained along the entire diaphragm.…”

supporting

confidence: 49%

Ring-down artifacts posterior to the right hemidiaphragm on abdominal sonography: sign of pulmonary parenchymal abnormalities.

Lim

Lee²,

Kim³

et al. 1999

Journal of Ultrasound in Medicine

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The aim of our study was to verify whether ring‐down artifacts posterior to the right hemidiaphragm on abdominal sonography reflected pulmonary parenchymal abnormalities. Forty patients (group 1) with abdominal diseases and 32 patients (group 2) with proved various pulmonary abnormalities involving the right lung base underwent abdominal sonography with 2‐4 MHz transducers. In these two groups, the presence and number of ring‐down artifacts were assessed and correlated with peridiaphragmatic lung findings on chest radiographs or computed tomographic scans. In 21 patients (group 3) with multiple (more than five) or numerous (10 or more) ring‐down artifacts, chest radiographs were reviewed to see if any peridiaphragmatic pulmonary abnormalities were present. In group 1, one or several (less than five) ring‐down artifacts were shown in 27 of 40 (68%) patients. In these patients, computed tomography showed insignificant focal intra‐ and interlobular septal thickening in the peridiaphragmatic right lung. In group 2, 31 of 32 (97%) patients showed multiple or numerous ring‐down artifacts. In group 3, chest radiographs showed various pulmonary abnormalities in 20 of 21 (95%) patients, including emphysema, idiopathic interstitial pneumonia, bronchopneumonia, and interstitial edema. Although nonspecific, ring‐down artifacts posterior to the right diaphragm on abdominal sonography may be used to predict pulmonary abnormalities when encountered on abdominal sonography in patients without specific pulmonary symptoms.

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“…Comet tail artifacts occur when there is a marked difference in acoustic impedances between an object and its surround (Ziskin et al 1982). 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).…”

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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The comet tail artifact.

Cited by 182 publications

References 1 publication

Sonographic diagnosis of foreign bodies of the distal extremities

Sonographic diagnosis of foreign bodies of the distal extremities

Ring-down artifacts posterior to the right hemidiaphragm on abdominal sonography: sign of pulmonary parenchymal abnormalities.

Ultrasound biomicroscopic localization and evaluation of intraocular foreign bodies

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