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Related Experiment Videos

Coronal imaging to assess urinary tract stone size.

Robert B Nadler1, Jeffrey A Stern, Simon Kimm

  • 1Department of Urology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.

The Journal of Urology
|August 18, 2004
PubMed
Summary

Coronal reconstructions provide more accurate urinary tract stone size measurements than axial images alone. Incorporating coronal views is crucial for precise stone assessment and clinical decision-making.

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Area of Science:

  • Radiology
  • Urology
  • Medical Imaging

Background:

  • Urinary tract stones are commonly evaluated using computerized tomography (CT).
  • Axial CT images accurately measure stone length and width.
  • Cephalocaudad dimensions are challenging to determine from axial CT images alone.

Purpose of the Study:

  • To determine if coronal reconstructions improve the accuracy of urinary tract stone size measurements.
  • To compare stone size measurements obtained from axial versus coronal CT reconstructions.

Main Methods:

  • Retrospective review of CT scans for urolithiasis evaluation (January-September 2001).
  • Measurement of stone length and width using axial images.
  • Measurement of cephalocaudad length and width using coronal reconstructions.

Related Experiment Videos

  • Estimation of cephalocaudad length from axial images.
  • Calculation of total stone area from both axial and coronal reconstructions.
  • Statistical analysis using the paired t test.

    • Main Results:

    • 102 patients with 151 stones were included.
    • Mean stone area was significantly larger in coronal reconstructions (31.29 mm²) compared to axial (22.23 mm²).
    • Mean greatest coronal dimension (6.51 mm) was significantly larger than the greatest axial dimension (4.87 mm).
    • Estimated cephalocaudad length from axial images (8.8 mm) differed significantly from actual coronal measurements (6.51 mm).
    • All comparisons showed statistically significant differences (p < 0.0001).

    Conclusions:

    • Axial CT images alone provide an inaccurate assessment of urinary tract stone size.
    • Coronal reconstructions offer a more comprehensive evaluation of stone dimensions.
    • Routine use of coronal reconstructions is recommended for accurate stone size measurement, aiding clinical decision-making.