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(Circulation. 2007;115:1464-1480.)
© 2007 American Heart Association, Inc.

New Drugs and Technologies

New Technology for Noninvasive Evaluation of Coronary Artery Disease

Marcelo F. Di Carli, MD; Rory Hachamovitch, MD, MSc

From the Divisions of Nuclear Medicine/PET and Cardiovascular Imaging, Departments of Radiology and Medicine (M.F.D.C.), Brigham and Women’s Hospital, Harvard Medical School, Boston, Mass, and the Division of Cardiology (R.H.), University of Southern California, Los Angeles, Calif.

Correspondence to Marcelo F. Di Carli, MD, Division of Nuclear Medicine/PET, Brigham and Women’s Hospital, 75 Francis St, Boston, MA 02115. E-mail mdicarli@partners.org

Key Words: coronary disease • imaging • tomography

An extract of the first 250 words of the full text is provided, because this article has no abstract.

	Introduction

 
Cardiac computed tomography (CT) and positron emission tomography (PET) are emerging as powerful noninvasive imaging tools for the evaluation of atherosclerosis in patients with known or suspected coronary artery disease (CAD). Unlike invasive coronary angiography, CT coronary angiography (CTA) not only assesses disease within the coronary lumen but can also provide direct qualitative and quantitative information about nonobstructive atherosclerotic plaque burden within the vessel wall. Thus, it is possible that CTA-based patient evaluation may provide more clinically relevant information on which to base risk assessments compared with conventional "lumenography." On the other hand, PET is rapidly growing as a powerful and efficient alternative to conventional single-photon emission CT (SPECT) imaging to evaluate regional myocardial perfusion and metabolism in patients with CAD. In addition, PET scanners are now being converted to hybrid PET/CT devices, which, in the setting of CAD, offer the potential for a comprehensive noninvasive cardiac evaluation of anatomy and function. This review will discuss current and potential future applications of cardiovascular CT, PET, and hybrid PET/CT, with a particular focus on ischemic heart disease.

	Conceptual Framework of Noninvasive Imaging Strategies for CAD

 
The information provided by noninvasive imaging generally falls into 1 of 3 categories: myocardial perfusion, left ventricular (LV) function, or coronary artery anatomy. The clinical utility, value, and role of a noninvasive modality are based on 2 test characteristics: What type of information is provided (eg, stress perfusion, stress and/or rest LV function, coronary anatomy), and what is the accuracy of the information provided. For example, SPECT and PET both provide stress and rest . . . [Full Text of this Article]

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