In addition to model validation, the detailed 3D simulation results show that at the initial absorption stage, the vessel temperature and H/M ratio distributions are uniform throughout the entire vessel, indicating that hydrogen absorption is very efficient early during the hydriding process; thus, the local cooling effect is not influential.
Finally, the vessel absorption coefficient was set to μa3, and the same scattering coefficient as the background and inclusion.
The reflectance and absorption spectra from vessels and the macula were measured, from which the known spectral absorption signatures of oxy-hemoglobin and macular pigment were successfully identified.
At 415 nm, seen in Fig. 6(c), the intra-vessel absorption was high enough to completely prevent the excitation light from penetrating through to deeper tissues.
IVPA imaging is sensitive to optical absorption contrast inside the vessel wall [ 9, 10].
By combining an IVPA image with its co-registered IVUS image, the distribution of the endogenous and exogenous optical absorption contrast inside the vessel wall can be visualized [ 8, 11].
Vessels in breast tissue are predominantly tubular structures and recovering structure and absorption values of these vessels give important information useful for breast cancer detection and determining oxygenation of the breast [ 1, 6].
In addition, as the new growing blood vessels entered, absorption of DDM particles were observed, and so it can be considered that DDM plays the role of an ideal scaffold as DDM is slowly absorbed, maintaining the space, and replaced by new bone.
Muscles are richly supplied with blood vessels and absorption is much more rapid than from the subcutis and the curative effect faster.
In the stroma which consists mainly of connective tissue and blood vessels, hemoglobin absorption increases due to angiogenesis accompanying the development of precancers.
The natural hyperpermeability of tumor vessels increases absorption of macromolecular drugs into tumor tissue, suggesting that further enhancement of this process could be beneficial to the treatment of cancer (Baban and Seymour, 1998).
