Detection of cancer at early stages is a critical step in improving cancer treatment. Currently, detection and diagnosis of cancer usually depend on changes in cells and tissues that are detected by a doctor's physical touch or imaging expertise. Instead, scientists would like to make it possible to detect the earliest molecular changes, long before a physical exam or imaging technology is effective. To do this, they need a new set of tools.
![Nanodevices Can Improve Cancer Detection and Diagnosis](https://webarchive.library.unt.edu/eot2008/20081006130124im_/http://www.cancer.gov/images/Documents/59f950a6-9b9d-43ad-80a4-776cefdd17ce/cancer7.jpg)
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