Interventional Radiology: Computed Tomography

1789 Words 8 Pages
he intent of the paper is to give the reader a closer examination of a variety of Medical Imaging modalities that are being used today. A short rundown is presented for Interventional Radiography, Nuclear Medicine, Mammography, Magnetic Resonance Imaging, Ultrasound, and Radiation Therapy. Following is a more in-depth look at Computed Tomography that will give the reader a better comprehension of how it separates itself from other medical imaging specialties.
Interventional radiology:

The concept behind interventional radiology is to treat and diagnose patients using the least amount of invasive techniques that are available today. The primary goal is to have a healthy outcome and minimize risks. These procedures offer less pain, less recovery
…show more content…
Sagittal, coronal, and axial planes are all optimal diagnostic viewpoints. A Computed Tomography unit utilizes an x-ray tube and a detector array to find anatomic information from a patient. A typical repeating method that is required is an intravenous infusion of an iodinated contrast agent which helps to distinguish between pathology and ordinary tissue. Since the introduction of clinical Computed Tomography scanning in the early 1970s, systems have evolved through four generations. The distinction between generations is related primarily to the number and arrangement of the detectors, the devices that measure the lessening of the transmitted x-ray beam. (Woodward,A., MA, RT(R)(CT)(QM), Chapman, T., RT(R)(CT) - …show more content…
These systems include highly complex computing and imaging devices. The x-ray tube is similar to a general radiographic tube in construction and operation; however, modifications are required for the tube to withstand additional heat capacity due to the expansion in exposure times. Detectors are solid state and are comprised of photodiodes combined with scintillation crystal materials. Solid-state detectors convert transmitted x-ray energy into light, which is converted into electrical energy and then into a digital signal. The detector array affects patient dose and the efficiency of the Computed Tomography unit. Collimation is imperative because it reduces patient dose and improves image quality. Current generation scanners generally use one collimator (at the x-ray tube), which shapes and confines the beam. The slice thickness on modern multi-detector units is controlled by the size of the detector row used. (Woodward,A., MA, RT(R)(CT)(QM), Chapman, T., RT(R)(CT) - 2014)
Nowadays, Computed Tomography is more readily accessible to patients especially for head traumas which speed up the process of determining injuries of all levels. From the beginning, Intravenous Pyelogram (IVP) was done utilizing conventional x-ray to locate kidney stones. This process was long and drawn out with the time it took the infusion of contrast to go through the system. However, with

Related Documents