The TSA is in the process of introducing new Advanced Imaging Technology which will substantially address the questions of modesty. Any potential threat items that are detected are detected by an automated system and indicated on a generic outline of a person (rather than the passenger's body). If no potential threat items are detected, an "OK" appears on the monitor with no outline.(See the illustrations below.)
Click here to can get more information on the new system. Deployment of the new technology is not yet scheduled for the major NYC area (see the current list here), but the TSA plans to eventually install it everywhere.
The backscatter technology used in the system was evaluated by the Food and Drug Administration’s (FDA) Center for Devices and Radiological Health (CDRH), the National Institute for Standards and Technology (NIST), and the Johns Hopkins University Applied Physics Laboratory (APL). All reported that it is safe and meets national health and safety standards. Click here to read more and download the evaluations.
They also informed us of new Risk-Based Security and Pre-Check pilot programs which will allow passengers to voluntarily provide more information about themselves, so that the TSA can better segment the population in terms of risk and provide expedited screening for "trusted travelers". See more information here.