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Full-Text Articles in Medicine and Health Sciences
Portal Imaging Using A Csi (Tl) Scintillator Coupled To A Cooled Ccd Camera, Amit Sawant
Portal Imaging Using A Csi (Tl) Scintillator Coupled To A Cooled Ccd Camera, Amit Sawant
Theses and Dissertations (ETD)
The purpose of this research was to design a high performance digital portal imaging
system, using a transparent x-ray scintillator coupled to a cooled CCD camera. Theoretical
analysis using Monte Carlo simulation was performed to calculate the QDE, SNR and DQE of
the system. A prototype electronic portal imaging device (EPID) was built, using a 12.7 mm
thick, 20.32 cm diameter, CsI (Tl) scintillator, coupled to an Astromed ® liquid nitrogen cooled
CCD TV camera. The system geometry of the prototype EPID was optimized to achieve high
spatial resolution. Experimental evaluation of the prototype EPID was performed, by
determining its …
Late Effects Of Ionizing Radiation On Normal Microvascular Networks, Vinh Nguyen
Late Effects Of Ionizing Radiation On Normal Microvascular Networks, Vinh Nguyen
Theses and Dissertations (ETD)
Therapeutic doses of ionizing radiation result in changes in the structure and function of microvascular networks in normal tissue. Previously, we reported on the early effects of ionizing radiation on microvascular networks at 3, 7, and 30 days post-irradiation [1-3]. Data from the early time points suggested that ionizing radiation significantly alters the structure and function of microvascular networks and interferes with the normal processes of vessel maturation. Here, we
present our findings on the late effects of ionizing radiation on normal tissue microvasculature at 60, 120, and 180 days post-irradiation. The cremaster muscle of Golden Syrian hamster was locally …