Qué hace esta calculadora
Combines lesion zone with T2, diffusion, and dynamic contrast-enhancement scores.
Select the lesion zone and sequence scores. The calculator applies the PI-RADS v2.1 dominant-sequence rules.
Antes del cálculo
- Confirm an untreated prostate and a technically adequate multiparametric MRI, then identify the lesion's zone.
- Score the dominant sequence for that zone and review biopsy, treatment, PSA, and prior imaging history.
Alcance clínico
Use PI-RADS v2.1 for multiparametric MRI assessment of the untreated prostate when evaluating the likelihood of clinically significant prostate cancer. The dominant sequence differs between peripheral-zone and transition-zone lesions.
Aplicabilidad y exclusiones
- The score is not a staging system and does not assess nodal, osseous, or metastatic disease.
- Post-treatment prostate and substantial post-biopsy change require separate interpretation; clinical history, PSA, and prior pathology remain essential.
Método y lógica de cálculo
For peripheral-zone lesions, diffusion is the dominant sequence and dynamic contrast enhancement can upgrade a qualifying score 3 lesion. For transition-zone lesions, T2-weighted imaging is dominant with diffusion used in the specified tie-breaking pathway.
Tabla de interpretación
| Score | Likelihood of clinically significant cancer |
|---|---|
| 1 | Very low |
| 2 | Low |
| 3 | Intermediate / equivocal |
| 4 | High |
| 5 | Very high |
Errores frecuentes
- Applying peripheral-zone dominant-sequence rules to a transition-zone lesion, or vice versa.
- Treating PI-RADS as a staging system or a stand-alone biopsy decision.
PI-RADS expresses the likelihood of clinically significant prostate cancer; it does not establish histology or stage.
Ejemplo práctico
Caso: Fictional example: a peripheral-zone lesion has DWI score 3 and focal positive dynamic contrast enhancement.
Cálculo: Peripheral zone selects DWI as dominant; qualifying positive DCE upgrades the overall assessment from 3 to 4.
Interpretación: Example output: PI-RADS 4. Confirm image quality, lesion measurements, and the complete v2.1 rules before reporting.
Cómo usar esta calculadora
- Completa los campos visibles de imagen y medición. Los datos obligatorios están indicados en la herramienta.
- Revisa la categoría, la puntuación, las mediciones y cualquier recomendación o advertencia calculada.
- Copia el texto para el informe solo después de comprobar el resultado con la exploración completa y la guía de referencia.
Preguntas sobre esta calculadora
Why does lesion zone matter?
Because DWI is dominant in the peripheral zone, while T2-weighted imaging is dominant in the transition zone.
Does PI-RADS include PSA density?
No. PSA density is clinically relevant but is calculated separately and does not change the imaging score itself.
¿Se envían las mediciones de pacientes a RadPhrases?
No. Los datos introducidos y los resultados se procesan en el navegador y esta página no los envía.