452 A Study of Dry imager & Wet imager for Lung cancer Screening CT

CT screening for lung cancer.

Recommendations against screening for lung cancer were based on the lack of a reduction in mortality of the screened group as compared with the control group in randomized control trials. These results were interpreted as showing that early detection of lung cancer as a result of screening did not decrease the mortality rate compared with detection after presentation of symptoms for the populat...

CT screening for lung cancer

Please include a few sentences as an abstract of the paper so that it will have a presence in the online databases.

CT screening for lung cancer.

CT screening for lung cancer.

To the Editor: The survival data from the International Early Lung Cancer Action Program (I-ELCAP) study of computed tomographic (CT) screening for lung cancer, as reported by Henschke et al. (Oct. 26 issue), are misleading.1 These estimates of survival are potentially confounded by lead-time and overdiagnosis biases of unknown magnitude and therefore defy meaningful interpretation. Although th...

A Heterodyning Range Imager

We describe a full-field range imager based on a heterodyning configuration. The scene is illuminated with a modulated light source. The received refl ected light is mixed in a high-speed shutter with a frequency shifted version of the light source modulation. This results in a low frequency signal, with the range encoded as phase, that is easily measured with standard CCD machine vision camera...