CT is an imaging technique that uses X-rays from 360-degree directions. The X-ray projection data is subsequently reconstructed using a computer to yield detailed cross-sectional and 3D images of the human body. While CT imaging does not provide the same level of tissue-to-tissue contrast as MRI, which generates images depicting the properties of biological tissues, it has two significant benefits. Firstly, it can capture a broad area in a short duration, and secondly, it provides high spatial resolution. Thus, CT imaging is widely utilized in clinical practice for various purposes, such as identifying the causes of abdominal discomfort and determining the stage of malignant tumors.