Imaging characteristics of intraocular foreign bodies: A comparative study of plain film x-ray, computed tomography, ultrasound, and magnetic resonance imaging

Bobeck S. Modjtahedi, Andrew Rong, Matthew Bobinski, John P McGahan, Lawrence S Morse

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Purpose: To determine the imaging features of common intraocular foreign bodies (IOFBs) and the ability to differentiate types of IOFBs.

Method: Four-mm IOFBs were inserted via through pars plana approach into cadaveric lamb eyes. Six metallic (aluminum, brass, copper, silver, steel, and lead) and seven nonmetallic (plastic [CF6 spectacle plastic and polyvinyl chloride pipe], glass [bottle glass and windshield glass], wood [dry and wet poplar], and stone [slate]) IOFBs were imaged using plain film x-ray, computed tomography scan, ultrasound, and magnetic resonance imaging (T1, T2, and gradient echo sequences).

Results: Plain film x-ray had limited ability to differentiate most IOFBs. Computed tomography findings can be divided into low attenuation objects (wood), moderate attenuation (CF6 spectacle plastic), high attenuation without surrounding artifact (polyvinyl chloride, slate, bottle glass, windshield glass, and aluminum), high attenuation with shadow artifact and minimal edge streak artifact (steel, brass, copper), and high attenuation with significant shadow artifact and prominent streak artifact (silver and lead). Density (in Hounsfield units) aided in differentiating the types of IOFBs. Gradient echo sequences on magnetic resonance imaging also held utility. Ultrasound images had considerable overlap in appearances.

Conclusion: Imaging techniques can significantly aid in determining the IOFBs type, with computed tomography serving as the best initial modality. X-ray holds limited utility while ultrasound and magnetic resonance imaging are best reserved as adjunctive tests.

Original languageEnglish (US)
Pages (from-to)95-104
Number of pages10
JournalRetina
Volume35
Issue number1
DOIs
StatePublished - Jan 3 2015

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Motion Pictures
Foreign Bodies
Tomography
Magnetic Resonance Imaging
X-Rays
Artifacts
Glass
Plastics
Steel
Aluminum
Polyvinyl Chloride
Silver
Copper
Somatotypes
Temazepam

Keywords

  • computed tomography
  • intraocular foreign body
  • magnetic resonance imaging
  • radiograph
  • retina
  • trauma
  • ultrasound
  • vitreous
  • x-ray

ASJC Scopus subject areas

  • Ophthalmology

Cite this

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title = "Imaging characteristics of intraocular foreign bodies: A comparative study of plain film x-ray, computed tomography, ultrasound, and magnetic resonance imaging",
abstract = "Purpose: To determine the imaging features of common intraocular foreign bodies (IOFBs) and the ability to differentiate types of IOFBs.Method: Four-mm IOFBs were inserted via through pars plana approach into cadaveric lamb eyes. Six metallic (aluminum, brass, copper, silver, steel, and lead) and seven nonmetallic (plastic [CF6 spectacle plastic and polyvinyl chloride pipe], glass [bottle glass and windshield glass], wood [dry and wet poplar], and stone [slate]) IOFBs were imaged using plain film x-ray, computed tomography scan, ultrasound, and magnetic resonance imaging (T1, T2, and gradient echo sequences).Results: Plain film x-ray had limited ability to differentiate most IOFBs. Computed tomography findings can be divided into low attenuation objects (wood), moderate attenuation (CF6 spectacle plastic), high attenuation without surrounding artifact (polyvinyl chloride, slate, bottle glass, windshield glass, and aluminum), high attenuation with shadow artifact and minimal edge streak artifact (steel, brass, copper), and high attenuation with significant shadow artifact and prominent streak artifact (silver and lead). Density (in Hounsfield units) aided in differentiating the types of IOFBs. Gradient echo sequences on magnetic resonance imaging also held utility. Ultrasound images had considerable overlap in appearances.Conclusion: Imaging techniques can significantly aid in determining the IOFBs type, with computed tomography serving as the best initial modality. X-ray holds limited utility while ultrasound and magnetic resonance imaging are best reserved as adjunctive tests.",
keywords = "computed tomography, intraocular foreign body, magnetic resonance imaging, radiograph, retina, trauma, ultrasound, vitreous, x-ray",
author = "Modjtahedi, {Bobeck S.} and Andrew Rong and Matthew Bobinski and McGahan, {John P} and Morse, {Lawrence S}",
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T2 - A comparative study of plain film x-ray, computed tomography, ultrasound, and magnetic resonance imaging

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AU - Bobinski, Matthew

AU - McGahan, John P

AU - Morse, Lawrence S

PY - 2015/1/3

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N2 - Purpose: To determine the imaging features of common intraocular foreign bodies (IOFBs) and the ability to differentiate types of IOFBs.Method: Four-mm IOFBs were inserted via through pars plana approach into cadaveric lamb eyes. Six metallic (aluminum, brass, copper, silver, steel, and lead) and seven nonmetallic (plastic [CF6 spectacle plastic and polyvinyl chloride pipe], glass [bottle glass and windshield glass], wood [dry and wet poplar], and stone [slate]) IOFBs were imaged using plain film x-ray, computed tomography scan, ultrasound, and magnetic resonance imaging (T1, T2, and gradient echo sequences).Results: Plain film x-ray had limited ability to differentiate most IOFBs. Computed tomography findings can be divided into low attenuation objects (wood), moderate attenuation (CF6 spectacle plastic), high attenuation without surrounding artifact (polyvinyl chloride, slate, bottle glass, windshield glass, and aluminum), high attenuation with shadow artifact and minimal edge streak artifact (steel, brass, copper), and high attenuation with significant shadow artifact and prominent streak artifact (silver and lead). Density (in Hounsfield units) aided in differentiating the types of IOFBs. Gradient echo sequences on magnetic resonance imaging also held utility. Ultrasound images had considerable overlap in appearances.Conclusion: Imaging techniques can significantly aid in determining the IOFBs type, with computed tomography serving as the best initial modality. X-ray holds limited utility while ultrasound and magnetic resonance imaging are best reserved as adjunctive tests.

AB - Purpose: To determine the imaging features of common intraocular foreign bodies (IOFBs) and the ability to differentiate types of IOFBs.Method: Four-mm IOFBs were inserted via through pars plana approach into cadaveric lamb eyes. Six metallic (aluminum, brass, copper, silver, steel, and lead) and seven nonmetallic (plastic [CF6 spectacle plastic and polyvinyl chloride pipe], glass [bottle glass and windshield glass], wood [dry and wet poplar], and stone [slate]) IOFBs were imaged using plain film x-ray, computed tomography scan, ultrasound, and magnetic resonance imaging (T1, T2, and gradient echo sequences).Results: Plain film x-ray had limited ability to differentiate most IOFBs. Computed tomography findings can be divided into low attenuation objects (wood), moderate attenuation (CF6 spectacle plastic), high attenuation without surrounding artifact (polyvinyl chloride, slate, bottle glass, windshield glass, and aluminum), high attenuation with shadow artifact and minimal edge streak artifact (steel, brass, copper), and high attenuation with significant shadow artifact and prominent streak artifact (silver and lead). Density (in Hounsfield units) aided in differentiating the types of IOFBs. Gradient echo sequences on magnetic resonance imaging also held utility. Ultrasound images had considerable overlap in appearances.Conclusion: Imaging techniques can significantly aid in determining the IOFBs type, with computed tomography serving as the best initial modality. X-ray holds limited utility while ultrasound and magnetic resonance imaging are best reserved as adjunctive tests.

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KW - intraocular foreign body

KW - magnetic resonance imaging

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KW - retina

KW - trauma

KW - ultrasound

KW - vitreous

KW - x-ray

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