"Comparison of Cardiovascular Magnetic Resonance and Single-Photon Emission Computed Tomography in Women with Suspected Coronary Artery Disease from the CE-MARC Trial"
Circ
http://circ.ahajournals.org/content/early/2013/12/19/CIRCULATIONAHA.112.000071.abstract 
"Conclusions—In both sexes, CMR has greater sensitivity than SPECT. Unlike SPECT, there are no significant gender differences in the diagnostic performance of CMR. These findings plus an absence of ionising radiation exposure, mean that CMR should be more widely adopted in women with suspected CAD."