| Zugriffsnummer | 29920 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Time-resolved imaging of solid phantoms for optical mammography |
| Autor(in); Institution |
Grosenick, Dirk; 8.12, Biomedizinische Optik und NMR-Messtechnik, PTB-Berlin
Wabnitz, Heidrun; 8.12, Biomedizinische Optik und NMR-Messtechnik, PTB-Berlin
Rinneberg, Herbert; 8, Medizinphysik und metrologische Informationstechnik, PTB-Berlin
|
| Quelle/Jahr | Applied Optics: 36 (1997), 1, 221 - 231 |
| ISSN | 0003-6935 |
| DOI | |
| URL | |
| Verlag | Washington, DC: Soc. |
| Zusammenfassung | We have recorded time-resolved transillumination images of solid phantoms with objects embedded that differ in their scattering and absorption coefficients from those of the bulk material, simulating a compressed human breast with a tumor inside. Employing time-correlated single photon counting at rates of up to 1 MHz, we recorded distributions of times of flight of photons at 1369 scan positions within 2.5 min. Several quantities, such as fractional transmittance, first moments, Fourier amplitudes, phase shifts, and frequency-dependent effective transport scattering and absorption coefficients, have been derived from experimental data to form two-dimensional images. By recording such images at a selected total number of photons detected, we have determined the contrast and effective signal-to-noise ratio in each case. |
