📐 Prostate Volume & PSA Density Calculator

Prostate Volume Calculator ELLIPSOID FORMULA

ℹ️ Enter prostate measurements to calculate volume using the ellipsoid formula

Anteroposterior (AP) Length

Transverse (TR) Width

Craniocaudal (CC) Height

Formula: Volume = AP × TR × CC × 0.523

PSA Density Calculator RISK ASSESSMENT

ℹ️ Calculate PSA density to assess cancer risk

PSA Level

ng/mL

Prostate Volume

Will be automatically filled from volume calculation above

Formula: PSA Density = PSA ÷ Volume

📚 Clinical Reference Information ▼

Normal Prostate Volume

Normal: 25-30 cc

Prostatomegaly Classification:

Mild: 30-50 cc
Moderate: 50-80 cc
Marked: >80 cc

PSA Density Cutoffs

<0.09: Low risk - unlikely clinically significant cancer (NPV 96%)

0.09-0.15: Intermediate - clinical correlation advised

≥0.15: Consider biopsy for clinically significant cancer

0.19-0.20: Optimal sensitivity/specificity balance

PI-RADS 3 Management

For patients with PI-RADS 3 lesions on mpMRI, PSA density ≥0.15 ng/mL/cc warrants biopsy consideration, with positive predictive values approaching 60% for clinically significant disease.

Measurement Technique

According to ACR PI-RADS 2.1 guidelines, AP and TR measurements should be obtained on the sagittal plane for maximum accuracy.

Reference: RadioGyan Calculator

📊 PI-RADS Calculator