4D CT

What is 4D CT?

4D CT is a scan that captures both the spatial and temporal dimensions of an object. Unlike conventional 3D CT scans, which only show the shape and structure of an object at a fixed point in time, 4D CT scans can show how an object changes over time. This is achieved by taking multiple 3D CT scans at different time intervals and combining them into a single 4D image.

4D CT process

Data acquisition: A series of 2D CT images are acquired at different angles around the object using an X-ray source and detector. The images are synchronised with the motion of the object, which can be measured by external or internal sensors. The data acquisition can be performed in a continuous or gated mode, depending on the speed and regularity of the motion.

Image reconstruction: The 2D CT images are processed and combined using algorithms to form a 3D CT image for each time point. The image reconstruction can be done using analytical or iterative methods, depending on the accuracy and efficiency required. The image reconstruction can also correct for motion artifacts and noise that may affect the image quality.

Image analysis: The 3D CT images are displayed and analysed using various software tools and techniques. The image analysis can include segmentation, registration, visualisation, quantification, and modeling of the object and its motion. This analysis can provide useful information and insights for various applications and purposes.