Temporal-spatial characteristic evaluation in a dynamic flat-panel detector system

H. Kawashima; R. Tanaka; K. Matsubara; K. Ichikawa; K. Sakuta; S. Minami; N. Hayashi; S. Sanada; M. Kawamura; T. Yamamoto

doi:10.1117/12.844603

23 March 2010 Temporal-spatial characteristic evaluation in a dynamic flat-panel detector system

H. Kawashima, R. Tanaka, K. Matsubara, K. Ichikawa, K. Sakuta, S. Minami, N. Hayashi, S. Sanada, M. Kawamura, T. Yamamoto

Author Affiliations +

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76224T (2010) https://doi.org/10.1117/12.844603
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

This report presents the fundamental temporospatial characteristics of a dynamic flat-panel detector (FPD) system. We investigated the relationship between pixel value and X-ray pulse output, and examined reproducibility, dependence on pulse width, tube voltage, and pulse rate. Sequential images were obtained using a direct conversion-type dynamic FPD. The exposure conditions were: 110 kV, 80 mA, 6.3 ms, 7.5 fps, source-to-image distance (SID) 1.5 m. X-ray pulse output was measured using a dosimetry system with a sampling interval of 70 μs, to determine temporal changes in each X-ray pulse output. Temporal changes in pixel value were measured in the obtained images, and the relationship between pixel value and X-ray pulse output was examined. Reproducibility was assessed by comparing the results in two sequential images obtained under the same exposure conditions. Moreover, the relationships and properties were evaluated by changing the pulse width (12 ms and 25 ms), tube voltage (80 kV, 90 kV, and 100 kV), and pulse rate (3.75 fps and 15 fps). The results showed a good correlation between the X-ray pulse output and pixel values. Fluctuation of the pixel value measured in sequential images is thought to be mainly due to changes in X-ray pulse output, and is not caused by FPD.

Citation Download Citation

H. Kawashima, R. Tanaka, K. Matsubara, K. Ichikawa, K. Sakuta, S. Minami, N. Hayashi, S. Sanada, M. Kawamura, and T. Yamamoto "Temporal-spatial characteristic evaluation in a dynamic flat-panel detector system", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76224T (23 March 2010); https://doi.org/10.1117/12.844603

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available