Transrectal real-time elastography of the prostate: Normal patterns

Area of Science:

• Medical Imaging
• Urology
• Biophysics

Background:

• Transrectal real-time sonoelastography is increasingly important for prostate evaluation.
• Defining normal elasticity patterns correlated with prostate volume is crucial for clinical practice.

Purpose of the Study:

• To establish normal sonoelastography patterns of the prostate.
• To correlate these patterns with prostate volume and anatomical zones.
• To address technical considerations in prostate elastography.

Main Methods:

• 100 men (aged 30-87) with prostate volumes from 20-100 cc were studied.
• Strain images were acquired using an end-fire convex probe.
• Prostate anatomical zone elasticity was compared with gland volume.

Main Results:

• The peripheral zone was consistently elastic. Rare areas of reduced elasticity were seen in 23% of men over 40.
• The central zone showed variable elasticity, with posterior regions being more elastic than lateral/base regions.
• Transition zone elasticity varied with prostate volume: smaller glands (<45 cc) were more elastic than larger ones (>45 cc).

Conclusions:

• Real-time sonoelastography effectively differentiates prostate elastic properties.
• Normal elasticity patterns can be defined and correlated with prostate gland volume.
• Findings support the use of elastography for characterizing normal prostate tissue variations.