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Related Experiment Videos

Dynamic register in ocular ultrasonography: combining A- and B-scan techniques

L Santos Insua1, J Garcia Campos, J Lorenzo Carrero

  • 1Ophthalmology Department, Santiago University, Spain.

Documenta Ophthalmologica. Advances in Ophthalmology
|January 1, 1993
PubMed
Summary

Ultrasound (A-scan and B-scan) effectively identified characteristic movements in retinal detachment and choroidal melanoma. These dynamic register techniques aid in differentiating these serious ocular conditions.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Diagnostic Ultrasound

Background:

  • Distinguishing between retinal detachment with proliferative vitreoretinopathy and choroidal melanoma is crucial for effective treatment.
  • Dynamic register techniques using ultrasound offer a non-invasive method for ocular tissue analysis.

Purpose of the Study:

  • To evaluate the efficacy of A-scan and B-scan ultrasound in characterizing the dynamic properties of retinal detachment with proliferative vitreoretinopathy and choroidal melanoma.
  • To identify specific ultrasound findings indicative of each condition.

Main Methods:

  • Studied two patient groups: 50 with retinal detachment/proliferative vitreoretinopathy and 15 with choroidal melanoma.
  • Employed A-scan, standardized A-scan (Ossoinig's procedure), and B-scan ultrasound techniques.

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  • Focused on analyzing tissue movements and wave characteristics under ultrasound examination.

    • Main Results:

    • Retinal detachment/proliferative vitreoretinopathy showed 100% amplitude waves (90% of cases) and peak splitting on A-scan, with retinal mobility on B-scan (80% of cases).
    • Choroidal melanoma exhibited rapid spontaneous internal echo movements on A-scan, with B-scan detecting movement in larger tumors (3/15 cases).

    Conclusions:

    • Dynamic ultrasound findings, particularly tissue mobility patterns, can help differentiate between retinal detachment with proliferative vitreoretinopathy and choroidal melanoma.
    • A-scan and B-scan provide valuable complementary information for diagnosing these ophthalmic conditions.