Papers Published

1. Oshinski, J.N. and Hofland, L. and Mukundan, S. and Dixon, W.T. and Parks, W.J. and Pettigrew, R.J., Two-dimensional coronary MR angiography without breath holding, Radiology (USA), vol. 201 no. 3 (1996), pp. 737 - 43 .
   (last updated on 2007/04/15)

   Abstract:
   The authors' purpose was to determine whether breath holding can be eliminated in two-dimensional magnetic resonance (MR) imaging of the coronary arteries by using real-time respiratory gating. Thirty-one subjects (20 healthy volunteers, 11 patients) underwent MR imaging. In 13 subjects, a respiratory monitoring belt was used, and in 18 subjects, a navigator echo was used. MR imaging was performed with breath holding, respiratory gating, and respiratory gating with two signals acquired. Three reviewers conducted a blinded review of the images, and overall image quality was rated on a scale from 1 (poor) to 5 (excellent). Respiratory gating with two signals acquired provided image quality superior to that with breath-hold imaging (3.7 vs. 3.0, respectively; P<0.05). Measurements of signal-to-noise ratio (14.5 for respiratory gating with two signals acquired and 11.9 for breath holding) supported the results of the image review. Navigator-echo gating provided better image quality than the monitoring belt (3.7 vs. 3.1, respectively; P<0.05). It is concluded that breath holding may be eliminated by gating image acquisition to a real-time monitor of respiratory position. Respiratory gating enables improved resolution by means of acquisition of multiple signals, provides aligned sections of coronary arteries, and improves patient tolerance

   Keywords:
   angiocardiography;biomedical NMR;