Kim, Ho-Kyung
(Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology)
,
Cho, Gyu-Seong
(Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology)
,
Chung, Yong-Hyun
(Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology)
,
Ahn, Seong-Kyu
(Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology)
,
Lee, Hyung-Koo
(Department of Biomedical Engineering, Catholic University Medical College)
,
Kim, Hoi-Nam
(Department of Radiation Oncology, Catholic University Medical College)
,
Yoon, Sei-Chul
(Department of Radiation Oncology, Catholic University Medical College)
Prototype portal imaging device (EPID) based on CCD camera, which has a $20\times20cm^2$ field of view (FOV), has been developed and then tested by acquiring phantom images for 6 MV x-ray beam. While, among the captured images, each frame suffered notorious quantum noise, the frame averag...
Prototype portal imaging device (EPID) based on CCD camera, which has a $20\times20cm^2$ field of view (FOV), has been developed and then tested by acquiring phantom images for 6 MV x-ray beam. While, among the captured images, each frame suffered notorious quantum noise, the frame averaging largely enhanced the image quality against quantum noise. Over 60 frames averaging, the signal-to-noise ratio (SNR) was increased by $\sim20$ times and contrast was increased about 2 times in the skull-region of the acquired head-phantom image.
Prototype portal imaging device (EPID) based on CCD camera, which has a $20\times20cm^2$ field of view (FOV), has been developed and then tested by acquiring phantom images for 6 MV x-ray beam. While, among the captured images, each frame suffered notorious quantum noise, the frame averaging largely enhanced the image quality against quantum noise. Over 60 frames averaging, the signal-to-noise ratio (SNR) was increased by $\sim20$ times and contrast was increased about 2 times in the skull-region of the acquired head-phantom image.
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