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Related Experiment Videos

Contrast medium precipitation during abdominal CT.

D S Ball, P D Radecki, A C Friedman

    Radiology
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

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    Gastrografin precipitation in abdominal CT scans can cause artifacts. Adjusting the pH of Gastrografin solutions significantly reduces this precipitation, improving diagnostic accuracy for CT imaging.

    Area of Science:

    • Radiology
    • Medical Imaging
    • Gastroenterology

    Background:

    • Gastrografin (meglumine diatrizoate and diatrizoate sodium) is an oral contrast agent used in abdominal computed tomography (CT).
    • Precipitation of Gastrografin within the gastric lumen has been observed, potentially leading to beam-hardening artifacts and reduced diagnostic quality.
    • These artifacts can obscure pathology and limit the interpretation of abdominal CT scans.

    Purpose of the Study:

    • To investigate the incidence of Gastrografin precipitation during abdominal CT.
    • To evaluate the effect of pH modification on Gastrografin precipitation.
    • To determine if a buffered Gastrografin solution can reduce precipitation and improve CT image quality.

    Main Methods:

    • Review of 55 abdominal CT scans from patients who ingested 2% Gastrografin solution.

    Related Experiment Videos

  • In vitro CT scans of Gastrografin solutions titrated with hydrochloric acid or sodium hydroxide to assess pH effects.
  • Comparison of precipitation rates between standard and buffered Gastrografin solutions in 51 subsequent CT scans.

    • Main Results:

    • Twenty out of 55 patients (36%) showed intraluminal Gastrografin precipitation, causing beam-hardening artifacts.
    • In vitro studies demonstrated that raising the pH of Gastrografin virtually eliminated precipitation.
    • Abdominal CT scans using a buffered Gastrografin solution showed precipitation in only 5 out of 51 patients.

    Conclusions:

    • Gastrografin precipitation is a significant issue in abdominal CT, causing artifacts that compromise image quality.
    • Adjusting the pH of oral Gastrografin solutions by buffering effectively minimizes precipitation.
    • The use of properly buffered dilute oral Gastrografin solutions is recommended to decrease precipitation prevalence and enhance diagnostic value in abdominal CT examinations.