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Errors in quantitative dynamic three-dimensional keyhole MR imaging of the breast
D B Plewes1, J Bishop, I Soutar
1Department of Medical Biophysics, University of Toronto, Sunnybrook Health Science Centre, Ontario, Canada.
Journal of Magnetic Resonance Imaging : JMRI
|May 1, 1995
Summary
Three-dimensional (3D) keyhole magnetic resonance (MR) imaging shows potential for dynamic breast lesion monitoring. However, this technique can lead to significant errors, especially with smaller lesions and higher temporal resolution.
Area of Science:
- Medical Imaging
- Radiology
- Biophysics
Background:
- Three-dimensional (3D) keyhole magnetic resonance (MR) imaging offers dynamic monitoring of contrast agent uptake in breast lesions.
- This technique aims for complete breast coverage with high spatial and temporal resolution.
Purpose of the Study:
- To estimate errors associated with data truncation in 3D keyhole MR imaging for breast lesion analysis.
- To evaluate the impact of temporal resolution and object size on measurement accuracy.
Main Methods:
- Numerical simulations were used to assess various implementations of the 3D keyhole technique.
- The study analyzed errors resulting from data truncation in 2D and 3D region-of-interest measurements.
Main Results:
- Errors increase with higher temporal resolution and smaller object sizes.
- Significant errors (up to 75%) can occur for objects near 1-pixel diameter with 50% k-space sampling.
- Preliminary clinical images revealed artifacts indicative of insufficient k-space sampling.
Conclusions:
- The 3D keyhole technique may introduce substantial errors in contrast agent uptake measurements.
- Careful consideration of sampling strategies and object size is crucial for accurate interpretation of 3D keyhole MR breast imaging.
- Further optimization is needed to mitigate artifacts and ensure reliable clinical application.