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Related Experiment Videos

Comparability of CT-based and TRUS-based prostate volumes.

K R Badiozamani1, K Wallner, W Cavanagh

  • 1Department of Radiation Oncology, University of Washington, Seattle, USA.

International Journal of Radiation Oncology, Biology, Physics
|February 25, 1999
PubMed
Summary

Computed tomographic (CT) scans and transrectal ultrasound (TRUS) provide comparable prostate volume measurements for brachytherapy planning. Both imaging modalities showed close agreement in defining prostate dimensions and volumes.

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Area of Science:

  • Radiology
  • Urology
  • Medical Imaging

Background:

  • Accurate prostate volume measurement is crucial for effective brachytherapy planning.
  • Transrectal ultrasound (TRUS) is a common imaging modality for prostate brachytherapy.
  • Computed tomographic (CT) scans offer an alternative imaging method for prostate assessment.

Purpose of the Study:

  • To compare prostate volume measurements obtained by TRUS and CT scans.
  • To evaluate the suitability of CT scans for brachytherapy planning compared to TRUS.

Main Methods:

  • Ten patients undergoing prostate brachytherapy evaluation were included.
  • Both TRUS and CT imaging were performed on all patients.
  • Prostate contours were delineated at 5-mm intervals, and volumes were calculated.

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Main Results:

  • CT-based prostate volumes ranged from 31.1 to 48.1 cc; TRUS-based volumes ranged from 26.6 to 46.4 cc.
  • A strong correlation (r = 0.9) was observed between CT and TRUS volumes.
  • Prostatic dimensions (anterior-posterior, lateral, craniocaudal) were similar between the two modalities.

Conclusions:

  • CT scan volumes and measurements closely correlate with TRUS findings.
  • CT imaging is appropriate for pre- or postimplant dosimetry in prostate brachytherapy.
  • The study confirms the reliability of CT scans for prostate volume assessment in brachytherapy.