Phased array coils for upper extremity MRA.
A phased array coil was constructed for imaging the upper extremity vasculature for patients undergoing dialysis treatment. The phased array coil exhibits improved signal-to-noise ratio (SNR) over the body coil and allows imaging of the entire upper extremity. SNR as a function of depth was measured on a homogeneous phantom with the arm coil and compared with the body coil. Near the coil there is an improvement of a factor of 7 and at a depth of approximately 6-7 cm, there is an improvement of factor 2. In vivo SNR measurements resulted in similar improvements. Images of the upper extremity vasculature of healthy volunteers were generated using 2D-time-of-flight (2DTOF) angiography. Blood flow velocity was assessed in a CINE-phase contrast study.
Monroe
J W
JW
Department of Radiology, Ohio State University, Columbus, USA.
Schmalbrock
P
P
Spigos
D G
DG
D001132:Arm / Q000098:blood supply*; D016477:Artifacts; D001783:Blood Flow Velocity / Q000502:physiology; D003287:Contrast Media; D004867:Equipment Design; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation; D018810:Magnetic Resonance Angiography / Q000295:instrumentation*; D008961:Models, Structural; D009040:Motion Pictures; D018482:Muscle, Skeletal / Q000098:blood supply; D012039:Regional Blood Flow / Q000502:physiology; D006435:Renal Dialysis; D012815:Signal Processing, Computer-Assisted; D013499:Surface Properties
D003287:Contrast Media