Related Experiment Video
Updated: Apr 6, 2026
Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging
Published on: December 15, 2014
Prostate diffusion imaging with distortion correction
Rebecca A Rakow-Penner1, Nathan S White1, Daniel J A Margolis2
1Department of Radiology, University of California San Diego School of Medicine.
Purpose:
Diffusion imaging in the prostate is susceptible to distortion from B0 inhomogeneity. Distortion correction in prostate imaging is not routinely performed, resulting in diffusion images without accurate localization of tumors. We performed and evaluated distortion correction for diffusion imaging in the prostate.
Materials And Methods:
28 patients underwent pre-operative MRI (T2, Gadolinium perfusion, diffusion at b=800 s/mm(2)). The restriction spectrum protocol parameters included b-values of 0, 800, 1500, and 4000 s/mm(2) in 30 directions for each nonzero b-value. To correct for distortion, forward and reverse trajectories were collected at b=0 s/mm(2). Distortion maps were generated to reflect the offset of the collected data versus the corrected data. Whole-mount histology was available for correlation.
Results:
Across the 27 patients evaluated (excluding one patient due to data collection error), the average root mean square distortion distance of the prostate was 3.1 mm (standard deviation, 2.2mm; and maximum distortion, 12 mm).
Conclusion:
Improved localization of prostate cancer by MRI will allow better surgical planning, targeted biopsies and image-guided treatment therapies. Distortion distances of up to 12 mm due to standard diffusion imaging may grossly misdirect treatment decisions. Distortion correction for diffusion imaging in the prostate improves tumor localization.
Insights
Distortion correction in prostate diffusion MRI significantly improves tumor localization. This enhanced accuracy is crucial for precise surgical planning and targeted therapies in prostate cancer management.
Area of Science:
- Radiology
- Medical Imaging
- Oncology
Background:
- Prostate diffusion imaging is prone to B0 inhomogeneity distortions.
- Current clinical practice rarely corrects these distortions, impacting tumor localization.
- Inaccurate localization hinders effective prostate cancer treatment planning.
Purpose of the Study:
- To evaluate the effectiveness of distortion correction for prostate diffusion imaging.
- To quantify the extent of image distortion in standard prostate diffusion MRI.
- To demonstrate the benefit of distortion correction for improved tumor localization.
Main Methods:
- 28 patients underwent pre-operative MRI including T2, Gadolinium perfusion, and diffusion imaging.
- Restriction Spectrum Imaging (RSI) protocol with b-values up to 4000 s/mm(2) was used.
- Forward and reverse diffusion trajectories at b=0 s/mm(2) enabled distortion mapping and correction.
Main Results:
- The average root mean square distortion was 3.1 mm (SD 2.2 mm).
- Maximum distortion observed in the prostate reached up to 12 mm.
- Distortion correction was successfully applied to the diffusion data.
Conclusions:
- Prostate cancer MRI localization is improved with distortion correction.
- Significant distortion (up to 12 mm) can misdirect treatment decisions.
- Implementing distortion correction enhances MRI accuracy for surgical planning and therapies.
Related Concept Videos
01:17Assessment of Diffusion and Perfusion
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
01:20¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)