ERRORS IN QUANTITATIVE DYNAMIC 3-DIMENSIONAL KEYHOLE MR-IMAGING OF THE BREAST

被引：15

作者：

PLEWES, DB

BISHOP, J

SOUTAR, I

COHEN, E

机构：

[1] Department of Medical Biophysics, University of Toronto, Sunnybrook Health Science Centre, Toronto, Ontario, M4N 3M5

[2] Department of Radiology, Mount Sinal Hospital, Toronto, Ontario

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1995年 / 5卷 / 03期

关键词：

ARTIFACT; BREAST; MR; BREAST NEOPLASMS; CONTRAST ENHANCEMENT; GADOLINIUM; IMAGE PROCESSING; K-SPACE;

D O I：

10.1002/jmri.1880050322

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Three-dimensional (3D) keyhole magnetic resonance (MR) imaging has been proposed as a means of providing dynamic monitoring of contrast agent uptake by breast lesions, with complete breast coverage and high spatial and temporal resolution. The 3D keyhole technique dynamically samples the central regions of k-space in both phase-encoding directions and provides high-frequency data from a precontrast acquisition. Errors due to data truncation with two-dimensional and 3D region-of-interest measurements are estimated from a numerical simulation of various implementations of the 3D keyhole technique. Errors were found to increase with increasing temporal resolution and reduced object size. Errors of 75% are possible for objects with a diameter approaching 1 pixel when a 3D keyhole implementation that samples 50% of phase-encoding data in each direction is used. Preliminary clinical images with this approach illustrate artifacts consistent with inadequate k-space sampling.

引用

页码：361 / 364

页数：4

共 15 条

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