NHANES

banner image collage showing 4 pictures: portable x-ray device, mobile x-ray truck, chest-xray, and map of Kenya

The National Health and Nutrition Examination Surveys (NHANES), conducted by the National Center for Health Statistics, Centers for Disease Control (NCHS/CDC), are designed to assess the health and nutritional status of adults and children in the United States through interviews and direct physical examinations. Here are materials related to the second and third National Health and Nutrition Examination Surveys (NHANES II and III), carried out during the years 1976-1980 and 1988-1994, respectively.

Digitization of the NHANES Radiographs
The NHANES radiographs have been scanned by Dr. Bernie Huang at the University of California at Los Angeles and the University of California at San Francisco. Dr. Huang’s group used a Lumysis 100 with a 175 micron spot to scan the first 6000 radiographs. The remaining radiographs will be scanned on the Lumysis 150 again with a 175 micron spot size.

The radiographs are transferred from the Lumysis scanner internal disk to a SUN Sparc Classic LX via FTP. Once on the SUN, the quality control technician checks each image to insure that it passes stage-1 of the National Center for Health Statistics three-tiered quality control process. After the images have passed quality control, they are transferred to an erasable optical platter storage and transport to NCHS. NCHS then conducts stage-2 and stage-3 quality control on the images. Any image failing stage 1 is redigitized; any image failing stage 2 or 3 is tagged as failing quality control.