Title :
Picosecond holography-a new diagnostic tool?
Author_Institution :
Ind. Metrol., R. Inst. of Technol., Stockholm, Sweden
Abstract :
By studying only the part of a single picosecond laser pulse that arrives first, and thus has travelled the shortest path, it is possible to see profiles of transparent objects hidden between two ground glasses. Experiments are described which aim at imaging in living tissue, either because absorption of light causes a shadow, or because a difference in refractive index causes a time shift in the arrival of the light pulse. Light-in-flight recordings of a single pulse with an energy of 8 mJ and a duration of some 25 ps were successfully made using a mode-locked frequency-doubled YAG-laser. The mechanisms elucidated can potentially give selectivity for malignant tissue along with image information
Keywords :
holography; laser beam applications; patient diagnosis; 25 ps; 8 mJ; YAG-laser; biomedical imaging; cancer detection; diagnostic tool; frequency doubled laser; light in flight-recordings; living tissue; malignant tissue; mode locked laser; picosecond holography; picosecond laser pulse; Absorption; Cancer; Glass industry; Holography; Metrology; Optical pulses; Pulse measurements; Pulse shaping methods; Refractive index; Shape measurement;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo
DOI :
10.1109/ISCAS.1988.15476
