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Scott W. He investigates the impact of government and the private sector on access, quality, and pricing in health care, global trends in health care innovation, and key economic issues related to the future of technology-based medical advances.

Atlas is a frequent policy advisor to policymakers and government officials in the United States and in other countries. He has served as Senior Advisor for Health Care to a number of candidates for President of the United States, as well as having counselled members of the US Congress on health care, testified before Congress, and briefed directors of key agencies in the federal government.

In the private sector, Atlas is a frequent advisor to start-up entrepreneurs and companies in life sciences and medical technology. Atlas is also the editor of the leading textbook in the field, Magnetic Resonance Imaging of the Brain and Spine, now in Professorr fifth edition and previously translated from English into Mandarin, Spanish, and Portuguese.

He has been an editor, an associate editor, and a member of the editorial and scientific boards of many journals as well as national and international scientific societies during the past three decades and has written more than scientific publications in leading journals. As professor and Chief of Neuroradiology at Stanford University Medical Center from until and during his prior academic positions, Dr. Atlas trained more than one hundred neuroradiology fellows, many of whom are now leaders in the field throughout the world. The aims of this study were to analyze the distribution and amount of ionizing radiation delivered by CT scans in the modern era Dr Robert Lustig s A Professor Of high-speed CT and to estimate cancer risk in the elderly, the read article group most frequently imaged using CT scanning.

A retrospective cohort study was conducted using Medicare claims spanning 8 years to assess CT use. In the two populations, 1, 0.

Although radiation doses have been increasing along with the increasing reliance on CT scans for diagnosis and therapy, using conservative estimates Rboert worst-case scenario methodology, the authors found that the risk for secondary cancers is low in older adults, the group subjected to the most frequent CT scanning.

Trends showing increasing use, however, underscore the importance of monitoring CT utilization and its consequences.

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View details for DOI View details for Web of Science ID Dr Robert Lustig s A Professor Of View details for PubMedID Computed tomographic CT angiography is an imaging test that is safer and less expensive than an older test in diagnosing narrowing of the carotid arteries-the most common cause of stroke in US adults. Our examination of Medicare data between and found that about 20 percent of the time this test was used, it substituted for the older test. The majority of new use, however, constituted "incremental" use, in cases where patients previously would not have received any test. We found no evidence that the growth in CT angiography led to more patients' being treated for carotid artery disease. The value of the test as a substitute for the older procedure may be enough to still justify expanding use.

Tracking the uses of emerging technologies to encourage efficient use is essential, but it can be challenging in cases where new tools have multiple uses and information is incomplete. The overall goal of the paper is to understand the progress of the design and Dr Robert Lustig s A Professor Of of China's New Cooperative Medical System NCMS program between the second year of the program and In the paper we seek to assess some of the strengths and weaknesses of the program using a panel of national-representative, household survey data that were collected in and early According to our data, we confirm the recent reports by the Ministry of Health that there have been substantial improvements to the NCMS program in terms of coverage and participation.

We also show that rural individuals also perceive an improvement in service by While the progress of the NCMS program is clear, there are still weaknesses.

Most importantly, the program clearly does not meet one of its key goals of providing insurance against catastrophic illnesses. Our analysis shows that one of the limiting factors is constrained funding. The availability of computed tomography CT and magnetic resonance imaging MRI scanning has grown rapidly, but the value of increased availability is not clear. We document the relationship between CT and MRI availability and use, and we consider potentially important sources of benefits. We discuss key questions that need to be addressed if value is to be well understood.

In an example we study, expanded imaging may be valuable because it provides quicker access to more precise diagnostic information, although evidence for improved health outcomes is limited.]