An observation of increased contrast due to both T1 and T2 weighting in a synthetic image.
An observation was made that subtracted images generated by an SR/IR interleaved pulse sequence on a low field strength magnetic resonance imager (M&D Technology Ltd, Aberdeen, Scotland) contained contrast between pathological and normal tissues that was not explained by either T1 or T2 weighting alone. A theoretical model for this image has been derived and its validity confirmed by phantom experiments. It is shown that the subtracted image is dependent on the product of T1 and T2 prolongation for contrast. This type of image might be of use in screening for unknown pathologies and such techniques may shorten routine patient imaging times.
NMR Imaging Unit, Royal Infirmary, Edinburgh, Scotland.
H A
HA
McRitchie
J P
JP
Ridgway
L W
LW
Turnbull
D M
DM
Kean
D005682:Gadolinium; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008433:Mathematics; D008962:Models, Theoretical; D013382:Subtraction Technique; D013997:Time Factors
D005682:Gadolinium