Which imaging method is better for detecting prostate cancer: micro-ultrasound or mpMRI?
When it comes to detecting prostate cancer, two imaging methods are often compared: micro-ultrasound (micro-US) and multiparametric magnetic resonance imaging (mpMRI). Both are used to guide biopsies and find clinically significant prostate cancer (csPCa), which is cancer that needs treatment. A 2025 systematic review and meta-analysis directly compared these two methods and found that they perform similarly in detecting csPCa. This means that for most men, neither method is clearly superior, and the best choice may depend on what is available at your hospital and your doctor's expertise.
What the research says
A 2025 systematic review and meta-analysis pooled data from 11 studies involving over 3,600 men who had micro-US-guided biopsy and nearly 3,900 men who had mpMRI-guided biopsy. The analysis found no statistically significant difference in the detection rates of clinically significant prostate cancer between the two methods (odds ratio 1.13, 95% confidence interval 0.99-1.30, P = 0.07) 5. Similarly, there was no significant difference in detecting clinically insignificant prostate cancer (odds ratio 0.89, 95% CI 0.72-1.09, P = 0.25) 5. This means that, on average, both methods catch about the same number of important cancers.
Other imaging techniques have also been studied. For example, PSMA PET imaging (using a radioactive tracer that targets prostate cancer cells) can be combined with CT or MRI. A 2022 review found that PSMA PET-MRI is better than PSMA PET-CT for local tumor staging and detecting local recurrence, but both are similar for finding distant metastases 11. Additionally, prostate elastography (a type of ultrasound that measures tissue stiffness) can improve the sensitivity of standard ultrasound for cancer detection 10.
It is worth noting that mpMRI is often used before biopsy to identify suspicious areas, while micro-US is a newer technology that provides high-resolution images in real time during biopsy. Both methods aim to reduce unnecessary biopsies and improve cancer detection, but the current evidence does not show a clear winner for csPCa detection 5.
What to ask your doctor
- Which imaging method (micro-ultrasound or mpMRI) is available at your facility, and which do you recommend for my situation?
- How many prostate biopsies using micro-ultrasound or mpMRI does your center perform each year?
- If I have a PI-RADS 3 lesion on mpMRI, would PSMA PET imaging add useful information?
- Are there any additional costs or wait times associated with one method over the other?
- How would the choice of imaging affect the number of biopsy cores taken and the risk of complications?
This question is drawn from common patient questions about Oncology and answered using cited medical research. We do not provide individualized advice.