A comparison of CT scan to transrectal ultrasound-measured prostate volume in untreated prostate cancer

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Abstract

Purpose: To compare CT and transrectal ultrasound (TRUS)-measured prostate volumes in patients with untreated prostate cancer. Methods and Materials: Between 1995 and 1999, 48 consecutive patients at the Portland Veterans Affairs Medical Center were treated with external beam radiotherapy. In 36 of these patients, TRUS and CT measurements of the prostate volume were obtained before treatment and 3), the CT/TRUS volume ratio was 1.7, and it was 1.4 for men whose volume was greater than the median. The CT volumes were correlated similarly with the TRUS volumes regardless of the CT slice interval. Conclusion: A strong correlation was found between CT scan and TRUS measurement of the prostate volume; however, CT consistently overestimated the prostate volume by approximately 50% compared with TRUS.

Original languageEnglish (US)
Pages (from-to)29-32
Number of pages4
JournalInternational Journal of Radiation Oncology Biology Physics
Volume57
Issue number1
DOIs
StatePublished - Sep 1 2003

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Prostate
Prostatic Neoplasms
cancer
Cone-Beam Computed Tomography
Veterans
Radiotherapy
radiation therapy
intervals
Therapeutics

Keywords

  • CT
  • Prostate cancer
  • Prostate volume
  • Ultrasonography

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Radiation

Cite this

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title = "A comparison of CT scan to transrectal ultrasound-measured prostate volume in untreated prostate cancer",
abstract = "Purpose: To compare CT and transrectal ultrasound (TRUS)-measured prostate volumes in patients with untreated prostate cancer. Methods and Materials: Between 1995 and 1999, 48 consecutive patients at the Portland Veterans Affairs Medical Center were treated with external beam radiotherapy. In 36 of these patients, TRUS and CT measurements of the prostate volume were obtained before treatment and 3), the CT/TRUS volume ratio was 1.7, and it was 1.4 for men whose volume was greater than the median. The CT volumes were correlated similarly with the TRUS volumes regardless of the CT slice interval. Conclusion: A strong correlation was found between CT scan and TRUS measurement of the prostate volume; however, CT consistently overestimated the prostate volume by approximately 50{\%} compared with TRUS.",
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AU - Marshall, Lynn

AU - Garzotto, Mark

AU - Hung, Arthur

AU - Holland, John

AU - Beer, Tomasz (Tom)

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AB - Purpose: To compare CT and transrectal ultrasound (TRUS)-measured prostate volumes in patients with untreated prostate cancer. Methods and Materials: Between 1995 and 1999, 48 consecutive patients at the Portland Veterans Affairs Medical Center were treated with external beam radiotherapy. In 36 of these patients, TRUS and CT measurements of the prostate volume were obtained before treatment and 3), the CT/TRUS volume ratio was 1.7, and it was 1.4 for men whose volume was greater than the median. The CT volumes were correlated similarly with the TRUS volumes regardless of the CT slice interval. Conclusion: A strong correlation was found between CT scan and TRUS measurement of the prostate volume; however, CT consistently overestimated the prostate volume by approximately 50% compared with TRUS.

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