[Diagnostic imaging of prostate cancer]

Area of Science:

• Urology
• Medical Imaging
• Oncology

Background:

• Prostate cancer nodules often appear as hypoechoic lesions on ultrasonography.
• Isoechoic nodules and advanced prostate cancer with asymmetric enlargement present visualization challenges.
• Transrectal sonography demonstrates varying sensitivity and specificity for prostate cancer detection.

Purpose of the Study:

• To evaluate the utility of Doppler color flow imaging in conjunction with transrectal sonography for prostate cancer diagnosis.
• To assess the correlation between blood flow detection, disease stage, and tumor grade.
• To compare the effectiveness of transrectal sonography, CT, and MRI in visualizing prostate cancer.

Main Methods:

• Transrectal sonography with Doppler color flow imaging was employed.
• Detection rates of blood flow were analyzed in patients with prostate cancer, normal prostates, and benign prostatic hyperplasia.
• Correlation of blood flow with disease stage and tumor grade was examined.
• The impact of castration on blood flow was observed.
• Comparative analysis with CT scan and MRI was performed.

Main Results:

• Doppler color flow imaging revealed a higher detection rate of blood flow in prostate cancer cases compared to controls.
• Blood flow detection rates increased with advanced disease stages but showed no difference across tumor grades.
• Blood flow significantly decreased post-castration, becoming undetectable within 4 weeks.
• CT scans were found to be ineffective for prostate cancer diagnosis.
• MRI showed promise in visualizing the prostate's internal architecture and cancer lesions.

Conclusions:

• Doppler color flow imaging enhances the detection of prostate cancer via transrectal sonography.
• Blood flow characteristics correlate with prostate cancer stage and respond to hormonal therapy.
• MRI offers superior visualization of prostate cancer compared to CT scans.