Related Experiment Video
Updated: Jul 5, 2026
09:11
Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy
Published on: April 9, 2019
Automatic passive tracking of an endorectal prostate biopsy device using phase-only cross-correlation
André de Oliveira1, Jaane Rauschenberg, Dirk Beyersdorff
1Deutsches Krebsforschungszentrum, Abteilung Medizinische Physik in der Radiologie, Im Neuenheimer Feld 280, Heidelberg, Germany.
Magnetic Resonance in Medicine
|April 23, 2008
Summary
This study introduces an automated MR-guided prostate biopsy technique using a passive marker and a novel pulse sequence. This method enhances real-time needle tracking, improving precision and reducing procedure time for better lesion targeting.
Area of Science:
- Medical Imaging
- Biomedical Engineering
- Interventional Radiology
Background:
- MR-guided transrectal prostate biopsy is often manual and time-consuming.
- Manual realignment of imaging slices with biopsy needles hinders efficient lesion targeting.
Purpose of the Study:
- To present a novel pulse sequence for automated tracking of a passive marker during MR-guided prostate biopsy.
- To offer an alternative to existing active tracking methods for improved biopsy precision.
Main Methods:
- A pulse sequence automatically tracks a passive marker on a biopsy device holder.
- A phase-only cross-correlation (POCC) algorithm identifies the needle axis in orthogonal FLASH images.
- Real-time realignment of a trueFISP imaging slice is achieved using marker position data.
Main Results:
- The POCC algorithm precisely identified the marker even with initial misalignments up to 45 degrees.
- Needle placement precision of 1.5 +/- 1.1 mm was achieved at a frame rate of 1 image/s.
- Phantom experiments evaluated sensitivity to initial misalignments and signal-to-noise ratio.
Conclusions:
- The presented automated tracking technique offers a precise and efficient alternative for MR-guided prostate biopsies.
- Real-time image slice realignment based on passive marker tracking can significantly improve needle placement accuracy.
- This method has the potential to reduce procedure time and enhance targeting accuracy in prostate interventions.
