The event database contains all event-related information for the World of Photonics Congress.
Poster Hall B0 European Conferences on Biomedical Optics (ECBO) > Preclinical and Clinical Optical Diagnostics > Lunch Break and Poster Session - Monday
12:45-14:15 h | Hall B0 Hall B0, ICM
Subjects: Biophotonics and Medical Engineering
Human body mainly consists of muscle, bone and air, and we name penetrating photons the human-body-window (HBW) rays. The HBW spectra were measured using a white power light-emitting diode (LED) and a spectrometer. The photons from the LED penetrate the human body, and reflect, refract and scatter. Therefore, we measured only penetrating HBW spectra from the human body. In the HBW-CT, we used two 1.0-mm-diam copper pinholes and a 1.0-mm-diam polyacetal collimator. The white rays from the LED is focused by a lens, the white beam diameter is reduced using the pinhole, and the 1.0-mm-diam beam is exposed to the object. The penetrating HBW photons are selected out using the pinhole behind the object and detected by the phototransistor through the collimator. HBW-CT is accomplished by repeated translations and rotations of the object. The peak wavelength of the HBW spectra was 610 nm. The translation and rotation steps were 0.25 mm and 1.0º, respectively, and the spatial resolutions were determined as 1.0×1.0 mm2. The scanning time and a total rotation angle for CT were 9.8 min and 180º, respectively.