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首页> 外文会议>International Workshop on Digital Mammography >Comparison of Two Novel FFDM Systems with Different a-Se Detector Technology: Physical Characterization and Phantom Contrast Detail Evaluation in Clinical Conditions
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Comparison of Two Novel FFDM Systems with Different a-Se Detector Technology: Physical Characterization and Phantom Contrast Detail Evaluation in Clinical Conditions

机译：不同A-SE检测器技术的两种新型FFDM系统的比较：临床条件的物理特征和幻像对比细节评价

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摘要

Two new full field digital mammography (FFDM) equipments are compared, Fujifilm Amulet and Siemens Mammomat Inspiration. The systems are identical apart from the detector. Both use a-Se for photon conversion, but differ in detector readout technology: innovative photoconductive switching readout in the first system (pixel pitch 50 μm) and conventional a-Si TFT-matrix readout in the second (pixel pitch 8.5 μm). Comparison of the physical characteristics in terms of MTF, NNPS and DQE gives similar results for peak-DQE (both > 70% for Mo/Mo anode/target combination at 120 μGy detector entrance kerma_(ait)), but a slower DQE decline at higher frequencies in the first system. Image quality assessment was based on contrast to noise (CNR) measurement and automated contrast detail (CD) curve analysis (phantom CDMAM ver, 3.4 and CDMAM Analyser ver. 1.1, both Artinis). It revealed a superior performance of the new detector equivalent to an average glandular dose (AGD) reduction comprised between 8% and 28% at equal image quality.
机译：比较了两种新的全场数字乳房X线摄影（FFDM）设备，富士夫举动和西门子Mammomat启发。该系统与检测器相同。两者都使用A-SE进行光子转换，但探测器读数技术的不同：在第一系统（像素间距50μm）中的创新光电导切换读数和第二（像素间距8.5μm）中的传统A-Si TFT矩阵读出。在MTF，NNP和DQE方面的物理特性的比较给出了峰-DQE（MO / MO阳极/靶组合）的类似结果，在120μg探测器入口Kerma_（AIT）），但DQE较慢下降第一系统中的较高频率。图像质量评估基于噪声（CNR）测量和自动对比细节（CD）曲线分析（Phantom CDMAM Ver，3.4和CDMAM Analyzer Ver。1.1，都是Artinis）的对比。它揭示了当量的新探测器的优异性能，其等于平均腺剂量（AgD）减少，其在等于图像质量时为8％至28％。

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