TY - JOUR
T1 - High-frequency Doppler US of the prostate
T2 - Effect of patient position
AU - Halpern, Ethan J.
AU - Frauscher, Ferdinand
AU - Forsberg, Flemming
AU - Strup, Stephen E.
AU - Nazarian, Levon N.
AU - O'Kane, Patrick
AU - Gomella, Leonard G.
PY - 2002
Y1 - 2002
N2 - PURPOSE: To evaluate cancer detection with directed biopsy of the prostate on the basis of high-frequency Doppler ultrasonographic (US) findings, and to determine the effect of patient position on the observed flow pattern. MATERIALS AND METHODS: Thirty-two patients were evaluated in the left lateral decubitus position with gray-scale, color Doppler, and power Doppler transrectal US. Up to four directed biopsy specimens were obtained on the basis of gray-scale and Doppler US findings, and modified sextant biopsy followed. Analysis of variance and the Wilcoxon signed rank test were used to evaluate the distribution of Doppler signals within the prostate. Three healthy volunteers with no known prostate disease were also examined in supine and both decubitus positions. RESULTS: In the patient group, both color and power Doppler US demonstrated increased flow on the left side of the prostate, with greater flow toward the base of the gland (P < .002). Consequently, 62 of 90 directed-biopsy cores were obtained in the left base and midgland. The positive biopsy rate for directed biopsy was not significantly different from that of sextant biopsy (P = .4). Seven patients had cancer that was identified with sextant biopsy, but only four cancers were identified with directed biopsy. Each of the three healthy volunteers demonstrated increased Doppler flow on the dependent side when the subject was in the lateral decubitus position. CONCLUSION: The positive yield of directed biopsy was similar to the yield of sextant biopsy. On the basis of observations made in healthy volunteers, the authors conclude that flow asymmetry in patients who underwent biopsy may have been related to patient position.
AB - PURPOSE: To evaluate cancer detection with directed biopsy of the prostate on the basis of high-frequency Doppler ultrasonographic (US) findings, and to determine the effect of patient position on the observed flow pattern. MATERIALS AND METHODS: Thirty-two patients were evaluated in the left lateral decubitus position with gray-scale, color Doppler, and power Doppler transrectal US. Up to four directed biopsy specimens were obtained on the basis of gray-scale and Doppler US findings, and modified sextant biopsy followed. Analysis of variance and the Wilcoxon signed rank test were used to evaluate the distribution of Doppler signals within the prostate. Three healthy volunteers with no known prostate disease were also examined in supine and both decubitus positions. RESULTS: In the patient group, both color and power Doppler US demonstrated increased flow on the left side of the prostate, with greater flow toward the base of the gland (P < .002). Consequently, 62 of 90 directed-biopsy cores were obtained in the left base and midgland. The positive biopsy rate for directed biopsy was not significantly different from that of sextant biopsy (P = .4). Seven patients had cancer that was identified with sextant biopsy, but only four cancers were identified with directed biopsy. Each of the three healthy volunteers demonstrated increased Doppler flow on the dependent side when the subject was in the lateral decubitus position. CONCLUSION: The positive yield of directed biopsy was similar to the yield of sextant biopsy. On the basis of observations made in healthy volunteers, the authors conclude that flow asymmetry in patients who underwent biopsy may have been related to patient position.
KW - Prostate neoplasms, US
KW - Prostate, biopsy
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U2 - 10.1148/radiol.2223010946
DO - 10.1148/radiol.2223010946
M3 - Article
C2 - 11867778
AN - SCOPUS:0036190162
SN - 0033-8419
VL - 222
SP - 634
EP - 639
JO - Radiology
JF - Radiology
IS - 3
ER -