Color Doppler quantitative measures to predict outcome of biopsies in prostate cancer

Lidia Strigari, Annelisa Marsella, Stefano Canitano, Sara Gomellini, Stefano Arcangeli, Elisabetta Genovese, Biancamaria Saracino, Maria Grazia Petrongari, Steno Sentinelli, Marcello Crecco, Marcello Benassi, Giorgio Arcangeli

Research output: Contribution to journalArticle

Abstract

Purpose: The aim was to correlate the color Doppler flow activity pre- and postradiotherapy, using transrectal color Doppler ultrasonography (CDUS) and the 2 year positive biopsy rate after radiotherapy in patients with prostate cancer. Methods and materials: Analysis was carried out in 69 out of 160 patients who had undergone treatment with 3D-conformal radiotherapy (3D-CRT) to prostate and seminal vesicles. Patients were randomized to receive 80 Gy in 40 fractions in 8 weeks (arm A) and 62 Gy in 20 fractions in 5 weeks, 4 fractions per week (arm B). Color Doppler flow activity (CDFA) was evaluated calculating the vascularization index (VI), defined as the ratio between the colored and total pixels in the whole and peripheral prostate, delineated by a radiation oncologist on CDUS images, using EcoVasc a home-made software. The difference between the 2 year post- and pre-3D-CRT maximum VI (VImax), named Δ VImax, was calculated in the whole and peripheral prostate for each patient. Then, Δ VImax and the detected 2 year biopsy outcome were analyzed using the receiver operating characteristics (ROC) technique. Results: The VImax increased or decreased in patients with positive or negative biopsies, respectively, compared to the value before RT in both arms. The area under the ROC curve for Δ VImax in the whole and peripheral prostate is equal to 0.790 and 0.884, respectively. Conclusion: The Δ VImax index, comparing CDFA at 2 years compared to that before RT, allows the 2 year postradiotherapy positive biopsy rate to be predicted.

Original languageEnglish
Pages (from-to)4793-4799
Number of pages7
JournalMedical Physics
Volume35
Issue number11
DOIs
Publication statusPublished - 2008

Keywords

  • Biopsies
  • Color Doppler ultrasonography
  • Hypo-fractionated radiotherapy
  • Prostate cancer
  • Vascularization index

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Strigari, L., Marsella, A., Canitano, S., Gomellini, S., Arcangeli, S., Genovese, E., Saracino, B., Petrongari, M. G., Sentinelli, S., Crecco, M., Benassi, M., & Arcangeli, G. (2008). Color Doppler quantitative measures to predict outcome of biopsies in prostate cancer. Medical Physics, 35(11), 4793-4799. https://doi.org/10.1118/1.2990778