PDF(Pubmed)
Abstract：
UNASSIGNED: Abdominal radiographs remain useful in newborns. Given the high radiation sensitivity of this population, it is necessary to optimize acquisition techniques to minimize radiation exposure.
UNASSIGNED: Evaluate the effects of three additional filtrations on radiation dose and image quality in abdominal X-rays of newborns using an anthropomorphic phantom.
UNASSIGNED: Abdominal radiographs of an anthropomorphic newborn phantom were performed using acquisition parameters ranging from 55 to 70 kV and from 0.4 to 2.5 mAs, without and with three different additional filtrations: 0.1 mm copper (Cu) + 1 mm aluminum (Al), 0.2 mm copper + 1 mm aluminum, and 2 mm aluminum. For each X-ray the dose area product (DAP) was measured, the signal-to-noise ratio (SNR) was calculated, and image quality (IQ) was evaluated by two blinded radiologists using the absolute visual grading analysis (VGA) method.
UNASSIGNED: Adding an additional filtration resulted in a significant reduction in DAP, with a decrease of 42% using 2 mm Al filtration, 65% with 0.1 mm Cu + 1 mm Al filtration, and 78% with 0.2 mm Cu + 1 mm Al filtration (p < 0.01). The addition of 2 mm aluminum filtration does not significantly decrease the SNR (p = 0.31), CNR (p = 0.52) or the IQ (p = 0.12 and 0.401 for reader 1 and 2, respectively). However, adding copper-containing filtration leads to a significant decrease in, SNR, CNR and IQ.
UNASSIGNED: Adding a 2 mm Al additional filtration for abdominal radiographs in newborns can significantly reduce the radiation dose without causing a significant decrease in image quality.
UNASSIGNED: Evaluate the effects of three additional filtrations on radiation dose and image quality in abdominal X-rays of newborns using an anthropomorphic phantom.
UNASSIGNED: Abdominal radiographs of an anthropomorphic newborn phantom were performed using acquisition parameters ranging from 55 to 70 kV and from 0.4 to 2.5 mAs, without and with three different additional filtrations: 0.1 mm copper (Cu) + 1 mm aluminum (Al), 0.2 mm copper + 1 mm aluminum, and 2 mm aluminum. For each X-ray the dose area product (DAP) was measured, the signal-to-noise ratio (SNR) was calculated, and image quality (IQ) was evaluated by two blinded radiologists using the absolute visual grading analysis (VGA) method.
UNASSIGNED: Adding an additional filtration resulted in a significant reduction in DAP, with a decrease of 42% using 2 mm Al filtration, 65% with 0.1 mm Cu + 1 mm Al filtration, and 78% with 0.2 mm Cu + 1 mm Al filtration (p < 0.01). The addition of 2 mm aluminum filtration does not significantly decrease the SNR (p = 0.31), CNR (p = 0.52) or the IQ (p = 0.12 and 0.401 for reader 1 and 2, respectively). However, adding copper-containing filtration leads to a significant decrease in, SNR, CNR and IQ.
UNASSIGNED: Adding a 2 mm Al additional filtration for abdominal radiographs in newborns can significantly reduce the radiation dose without causing a significant decrease in image quality.
摘要：
■腹部X光片在新生儿中仍然有用。鉴于这些人群的辐射敏感性高,有必要优化采集技术以最大程度地减少辐射暴露。
■使用拟人化体模评估三个额外的过滤对新生儿腹部X射线中辐射剂量和图像质量的影响。
■使用55至70kV和0.4至2.5mAs的采集参数对拟人化新生儿体模进行腹部射线照片，没有和有三个不同的额外过滤：0.1毫米铜（Cu）+1毫米铝（Al），0.2毫米铜+1毫米铝，和2毫米的铝。对于每次X射线，测量剂量面积乘积（DAP），计算信噪比(SNR)，和图像质量（IQ）由两名失明的放射科医生使用绝对视觉分级分析（VGA）方法进行评估。
■添加额外的过滤导致DAP显着减少，使用2毫米铝过滤减少42%，65％，0.1mmCu+1mmAl过滤，和78％，0.2毫米的Cu+1毫米的Al过滤（p<0.01）。添加2毫米铝过滤不会显着降低SNR（p=0.31），CNR(p=0.52)或IQ(对于读取器1和2分别为p=0.12和0.401)。然而,添加含铜过滤导致显着减少，SNR,CNR和IQ。
■为新生儿腹部X光片添加2mmAl额外过滤可以显着降低辐射剂量，而不会导致图像质量显着下降。
■使用拟人化体模评估三个额外的过滤对新生儿腹部X射线中辐射剂量和图像质量的影响。
■使用55至70kV和0.4至2.5mAs的采集参数对拟人化新生儿体模进行腹部射线照片，没有和有三个不同的额外过滤：0.1毫米铜（Cu）+1毫米铝（Al），0.2毫米铜+1毫米铝，和2毫米的铝。对于每次X射线，测量剂量面积乘积（DAP），计算信噪比(SNR)，和图像质量（IQ）由两名失明的放射科医生使用绝对视觉分级分析（VGA）方法进行评估。
■添加额外的过滤导致DAP显着减少，使用2毫米铝过滤减少42%，65％，0.1mmCu+1mmAl过滤，和78％，0.2毫米的Cu+1毫米的Al过滤（p<0.01）。添加2毫米铝过滤不会显着降低SNR（p=0.31），CNR(p=0.52)或IQ(对于读取器1和2分别为p=0.12和0.401)。然而,添加含铜过滤导致显着减少，SNR,CNR和IQ。
■为新生儿腹部X光片添加2mmAl额外过滤可以显着降低辐射剂量，而不会导致图像质量显着下降。
