Related Experiment Videos
Prostate: high-frequency Doppler US imaging for cancer detection.
Ethan J Halpern1, Ferdinand Frauscher, Stephen E Strup
1Department of Radiology, Jefferson Prostate Diagnostic Center, Thomas Jefferson University, 132 S 10th St, Philadelphia, PA 19107-5244, USA. ethan.halpern@mail.tju.edu
Radiology
|October 2, 2002
Summary
Targeted prostate biopsy using Doppler ultrasound missed cancers found by standard sextant biopsy. Standard biopsy remains crucial for comprehensive cancer detection.
Area of Science:
- Urology
- Medical Imaging
- Oncology
Background:
- Prostate cancer diagnosis relies heavily on biopsy.
- Traditional methods include sextant biopsy.
- Advanced imaging like Doppler ultrasound is being explored for targeted biopsies.
Purpose of the Study:
- To compare cancer detection rates between targeted prostate biopsy guided by high-frequency Doppler ultrasonography (US) and standard modified sextant biopsy.
- To evaluate the effectiveness of Doppler US in identifying cancerous sites for biopsy.
Main Methods:
- Prospective evaluation of 62 patients using gray-scale, color, and power Doppler transrectal US.
- Biopsy specimens were obtained via targeted approach based on Doppler findings, followed by modified sextant biopsy.
- Statistical analysis included conditional logistic regression and clustered receiver operating characteristic analysis.
Main Results:
- Cancer was detected in 18 (29%) of 62 patients.
- Targeted biopsy had a slightly higher positive rate (13%) than sextant biopsy (9.7%), but this was not statistically significant (P =.1).
- Doppler imaging showed limited ability to reliably distinguish cancerous sites at biopsy locations (AUCs close to 0.5).
Conclusions:
- Targeted biopsy based on high-frequency Doppler US findings may miss a significant number of prostate cancers.
- Modified sextant biopsy remains a vital component for comprehensive prostate cancer detection.
- Further research is needed to improve the accuracy of imaging-guided targeted biopsies.