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J Magn Reson Imaging. 2011 Jul;34(1):231-8. doi: 10.1002/jmri.22593.

In vivo single scan detection of both iron-labeled cells and breast cancer metastases in the mouse brain using balanced steady-state free precession imaging at 1.5 T.

Author information

1
Imaging Research Laboratories, Robarts Research Institute, London, ON, Canada.

Abstract

PURPOSE:

To simultaneously detect iron-labeled cancer cells and brain tumors in vivo in one scan, the balanced steady-state free precession (b-SSFP) imaging sequence was optimized at 1.5 T on mice developing brain metastases subsequent to the injection of micron-sized iron oxide particle-labeled human breast cancer cells.

MATERIALS AND METHODS:

b-SSFP sequence parameters (repetition time, flip angle, and receiver bandwidth) were varied and the signal-to-noise ratio, contrast between the brain and tumors, and the number of detected iron-labeled cells were evaluated.

RESULTS:

Optimal b-SSFP images were acquired with a 26 msec repetition time, 35° flip angle, and bandwidth of ±21 kHz. b-SSFP images were compared with T(2) -weighted 2D fast spin echo (FSE) and 3D spoiled gradient recalled echo (SPGR) images. The mean tumor-brain contrast-to-noise ratio and the ability to detect iron-labeled cells were the highest in the b-SSFP images.

CONCLUSION:

A single b-SSFP scan can be used to visualize both iron-labeled cells and brain metastases.

PMID:
21698713
PMCID:
PMC3501681
DOI:
10.1002/jmri.22593
[Indexed for MEDLINE]
Free PMC Article

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