Friday, May 30, 2025
问题:X射线在空间某一点的强度是指单位时间内通过垂直于X射线传播方向上的单位面积上的()与()乘积的总和。...
Friday, May 30, 2025
问题:什么是特殊X射线摄影?试述软X射线摄影、高千伏X射线摄影、体层摄影的基本原理。...
Wednesday, November 20, 2024
Sunday, February 16, 2025
Friday, April 18, 2025
Sunday, July 23, 2023
问题:根据波数的定义,下面不正确的描述是()。A、与波长成反比B、与频率成正比C、与光子能量成正比D、与波长成正比...
Friday, May 30, 2025
Friday, April 4, 2025
Thursday, February 6, 2025
Saturday, October 12, 2024
Thursday, February 13, 2025
问题:对一幅图像的总模糊度有影响的因素是().A、成像系统的空间分辨力B、图像的运动模糊度C、焦点模糊度D、检测器模糊度...
Sunday, March 30, 2025
Wednesday, April 16, 2025
Wednesday, October 16, 2024
Wednesday, November 20, 2024
Tuesday, September 13, 2022
问题:声束聚焦的主要目的是().A、增加探测深度B、提高横向分辨力C、提高纵向分辨力...
Wednesday, October 16, 2024
问题:在递次衰变99Mo→99mTc中,子核放射性活度达到峰值的时间为()。A、6.02hB、66.02hC、23h...
Monday, February 3, 2025
Sunday, March 30, 2025