X-rayEvaluation of cervical spine injury (CSI) in children requires rapid, yet accurate assessment of damage. Given concerns of radiation exposure, expert consensus advises that computed tomography (CT) should be used sparingly. However, CT can provide superior image resolution and detection of ...
SPECT原理：通过摄入含有半衰期适当的放射性同位素药物，在药物到达所需要成像的断层位置后， 由于放射性衰变，将从断层处发出γ光子，位于外层的γ照相机探头的每个灵敏点探测沿一条投影线 (Ray)进来的γ光子，通过闪烁体将探测到的高能γ射线转化为能量较低但数量很大的光信号，通过光 电倍增管将光信号转化为电信号...
SPECT原理:通过摄入含有半衰期适当的放射性同位素药物,在药物到达所需要成像的断层位置后, 由于放射性衰变,将从断层处发出γ光子,位于外层的γ照相机探头的每个灵敏点探测沿一条投影线 (Ray)进来的γ光子,通过闪烁体将探测到的高能γ射线转化为能量较低但数量很大的光信号,通过光 电倍增管将光信号转化为电信号并进行...
SPECT原理:通过摄入含有半衰期适当的放射性同位素药物,在药物到达所需要成像的断层位置后, 由于放射性衰变,将从断层处发出γ光子,位于外层的γ照相机探头的每个灵敏点探测沿一条投影线 (Ray)进来的γ光子,通过闪烁体将探测到的高能γ射线转化为能...
Deciding between an MRI, CT scan, or X-ray can be confusing, especially when you’re not sure which is the most appropriate for your specific health concern. This guide demystifies the process, helping you understand when each type of imaging is recommended and what to consider before undergo...
关键词:骨;移植物;前交叉韧带;重建;骨隧道;3D-CT;X射线片 Application of three-dimensional reconstructive CT versus X-ray in postoperative evaluation of bone tunnel and graft status after single bundle anterior cruciate ligament near-isometric reconstruction Zheng Weipeng1, Wei Hewei1, Liu Zhijun1, ...
X-Ray vs. CT vs. MRI CT Scans|MRI|X-rays When doctors need to see what’s happening inside your body, they often have you get a diagnostic imaging test. There are several types of these imaging tests that help the doctor make an accurate diagnosis and choose the ideal treatment plan....
CT, or CAT scans, are special X-ray tests that produce cross-sectional images of the body using X-rays and a computer. CT scans are also referred to as computerized axial tomography. CT was developed independently by a British engineer named Sir Godfrey Hounsfield and Dr. Alan Cormack. It...
刘明华创伤患者ct选择的进与退刘明华 创伤患者CT选择的进与退 第三军医大学第一附属医院急救部刘明华教授 西南医院 SOUTHWESTHOSPITAL 西南医院 SOUTHWESTHOSPITAL 西南医院 SOUTHWESTHOSPITAL CT的发展 1963年1969年1972年1974年1977年X线投影数据重建图像技术1979年诺贝尔奖第一台头颅CTCT首次应用于临床第一台全身CT第三代...
非说成像的话，相干X射线对CDI的时间分辨率会比3代光源强很多，可以在X-ray对样品造成辐射损伤的时间...