What is the difference between MRI and CT?
Both MRI and CT make cross-sectional images (slices) of almost any area of the body using a sophisticated computer system. The major difference is that while an MRI uses a large magnet and radio waves to produce images, a CT scanner uses ionizing radiation. With the MRI studies, there is no exposure to ionizing radiation and there are no known side effects. The systems complement each other well as they both have their inherent strengths and weaknesses. CT, however, can only directly acquire transverse and coronal images, whereas MRI can directly acquire slices in any plane and is superior when it comes to soft tissue contrast.
Both MRI and CT are diagnostic exams used to thoroughly image a selected area of the human body. Similarly, both MRI and CT require the use of a large machine, and each method relies upon computer technology to reconstruct a cross-sectional image of the body. Aside from these very fundamental similarities, there are many inherent differences between MRI and CT scans. Magnetic Resonance Imaging (MRI) – Developed in the mid 1980s, MRI technology utilizes radio frequency waves and very powerful magnets. After applying a very strong, localized electromagnetic field, the MRI scanner emits a series of radio pulses into the body, exciting the hydrogen protons found in the bodys soft tissue. Upon measuring the relaxation times of these hydrogen protons, the MRI scanner employs sophisticated computer technology to interpret the protons behavior and recreates a 3-dimensional image of the body. Since hydrogen is the most abundant element in the body, MRI technology is capable of producing amazing
Both MRI and CT are diagnostic exams used to thoroughly image a selected area of the human body. Similarly, both MRI and CT require the use of a large machine, and each method relies upon computer technology to reconstruct a cross-sectional image of the body. Aside from these very fundamental similarities, there are many inherent differences between MRI and CT scans.
