This trial will compare the safety, diagnostic efficacy and efficiency of multi-slice computed tomography (MSCT) to the standard of care treatment of low to intermediate risk acute chest pain patients in the Emergency Department (ED). Daniel S. Berman, MD 11162 Coronary CT Acute chest pain 04/30/2008 Name: Nancy Zambrana Phone: (310) 423-4763 E-mail: ZambrananN@cshs.org