Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-01-21
1998-11-03
Casler, Brian
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
334309, 334306, H61B 5055
Patent
active
058301437
ABSTRACT:
A dynamic MRA study of a subject is performed using a 3D fast gradient-recalled echo pulse sequence that employs a non-selective RF excitation pulse. The frame rate of the resulting series of reconstructed images is increased by sampling a central region of k-space at a higher rate than the peripheral regions of k-space. The acquisition is gated using a cardiac trigger signal and the central region of k-space is acquired during diastole and the peripheral regions of k-space are acquired during systole. Image frames are reconstructed at each sampling of the central k-space region using the temporally nearest samples from the peripheral k-space regions. Two of the image frames are subtracted to form an MR angiogram.
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Frayne Richard
Grist Thomas M.
Korosec Frank R.
Mistretta Charles M.
Casler Brian
Wisconsin Alumnin Research Foundation
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