Performance characteristics of a Kodak computed radiography system.
Performance characteristics of a Kodak computed radiography system.
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柯达计算机放射成像系统的性能特征。
DOI：
10.1118/1.598781
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发表时间：
1999
期刊：
影响因子：
3.8
通讯作者：
Dobbins3rd,JT
中科院分区：
文献类型：
--
作者：
Bradford,CD;Peppler,WW;Dobbins3rd,JT
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The performance characteristics of a photostimulable phosphor based computed radiographic (CR) system were studied. The modulation transfer function (MTF), noise power spectra (NPS), and detective quantum efficiency (DQE) of the Kodak Digital Science computed radiography (CR) system (Eastman Kodak Co.‐model 400) were measured and compared to previously published results of a Fuji based CR system (Philips Medical Systems‐PCR model 7000). To maximize comparability, the same measurement techniques and analysis methods were used. The DQE at four exposure levels (30, 3, 0.3, 0.03 mR) and two plate types (standard and high resolution) were calculated from the NPS and MTF measurements. The NPS was determined from two‐dimensional Fourier analysis of uniformly exposed plates. The presampling MTF was determined from the Fourier transform (FT) of the system's finely sampled line spread function (LSF) as produced by a narrow slit. A comparison of the slit type (“beveled edge” versus “straight edge”) and its effect on the resulting MTF measurements was also performed. The results show that both systems are comparable in resolution performance. The noise power studies indicated a higher level of noise for the Kodak images (∼20% at the low exposure levels and 40%–70% at higher exposure levels). Within the clinically relevant exposure range (0.3–3 mR), the resulting DQE for the Kodak plates ranged between 20%–50% lower than for the corresponding Fuji plates. Measurements of the presampling MTF with the two slit types have shown that a correction factor can be applied to compensate for transmission through the relief edges.
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DOI：
--
发表时间：
1997
期刊：
Medical Imaging
影响因子：
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作者：
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DOI：
--
发表时间：
1990
期刊：
Medical Physics (Lancaster)
影响因子：
--
作者：
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通讯作者：
C. Ravin
影响因子：
3.8
作者：
DOBBINS, JT
通讯作者：
DOBBINS, JT
影响因子：
3.8
作者：
DOBBINS, JT;ERGUN, DL;CLARK, DC
通讯作者：
CLARK, DC
影响因子：
3.8
作者：
HILLEN, W;SCHIEBEL, U;ZAENGEL, T
通讯作者：
ZAENGEL, T