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Stone Protocols

  • "In patients with renal masses DE CT can provide high quality VNE data sets, which are a reasonable approximation of TNE data sets. Integration of DE scanning into a renal mass protocol will lower radiation exposure by 35%.” Dual Energy CT in patients Suspected of Having Renal Masses: Can Virtual Nonenhanced Images Replace True Nonenhanced Images?"

    Graser A et al
    Radiology 2009; 252:443-440

     

  • "Reductions in radiation dose are possible with dual energy CT if the need for true unenhanced datasets is eliminated, and if low tube currents are used, radiation doses delivered in dual-energy CT are similar to those used in single-energy CT."

    Dual-Energy Multidetector CT: Hoe Does It Work, What Can It Tell Us, and When Can We Use It in Abdominopelvic Imaging?
    Coursey CA et al.
    RadioGraphics 2010; 30:1037-1055

     

  • "Decreasing the tube charge from 100 to 30 mAs resulted in similar detection of renal stones while reducing patient radiation exposure by as much as 70%. Multidetector CT scanning parameters should be tailored to minimize radiation exposure to the patients while helping detect clinically significant renal stones."

    "The reduced radiation CT protocol (30 mAs) resulted in similar detection of renal stones 3.0 mm or larger compared with the standard radiation protocol (100 mAs) while reducing patient exposure by as much as 70%"

    Effect of Reduced Radiation CT Protocols on the Detection of Renal Calculi
    Jin DH et al
    Radiology 2010; 255;100-107

  • " In patients with known calculi greater than 3 mm being evaluated for recurrent pain or when calculi 3 mm or smaller are viewed as not clinically important due to their spontaneous passage, a protocol with up to 75% reduction in dose should be considered."

    Urinary Calculi: Radiation Dose Reduction of 50% and 75% at CT-Effect on Sensitivity
    Ciaschini MW et al.
    Radiology 2009; 251:105-111

  • "There was no statistically significant difference in sensitivity with a 50% or 75% dose reduction for the detection of calculi greater than 3 mm in diameter."

    Urinary Calculi: Radiation Dose Reduction of 50% and 75% at CT-Effect on Sensitivity
    Ciaschini MW et al.
    Radiology 2009; 251:105-111

     

  • There was no significant differences between the 100% examinations and the 50% and 25% examinations for the detection of calculi greater than 3 mm."

    Urinary Calculi: Radiation Dose Reduction of 50% and 75% at CT-Effect on Sensitivity
    Ciaschini MW et al.
    Radiology 2009; 251:105-111