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Comment & Response
April 2020

Effective Radiation Doses for Lung Cancer Screening Scans—Reply

Author Affiliations
  • 1Division of Gastroenterology, Department of Internal Medicine, University of California, San Diego, La Jolla
  • 2Department of Radiology and Biomedical Imaging, University of California, San Francisco
JAMA Intern Med. 2020;180(4):612. doi:10.1001/jamainternmed.2019.7422

In Reply We thank Bernheim for his thoughtful comments on our recently published Original Investigation.1 The American College of Radiology (ACR) and Centers for Medicare & Medicaid Services recommend a maximum volumetric computed tomography dose index (CTDIvol) of 3 mGy for lung cancer screening.2,3 As a measure of the average dose per slice, CTDIvol will reflect many of the scanning decisions made by the radiologists and technologists, and reliably measure average doses that patients will receive.

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