Radiology, which is the branch of medical science deals with treatment through the method of applying imagining technology like x-ray and radiation for diagnosing and treating diseases.  In radiology, an array of imaging technologies like ultrasound, computed tomography (CT), nuclear medicine, positron emission tomography (PET) and resonance imaging (MRI) is used. It is a radiographer or radiologic technologist who carries out procedures for performing radiography.  Below are some of the prominent technologies which are used in radiography.

1. Projection (plain) radiography: Radiograph is the techniques where, X rays are passed through a patient’s body and then are converted into an image for diagnosis of body part where they are passed through. The most common images produced by X-rays are silver impregnated films. However, with span of time Plain radiography is been under placement by Digital Radiography, DR in which X-rays strike over a plate of sensors which further on changes signals into digital information and in an image over computer screen.
2. Fluoroscopy: Fluoroscopy and angiography are enhanced use of X-ray imaging, where, under the radiography process a fluorescent screen and image intensifier tube is being attached with a closed-circuit television system for real time imaging of structures in motion or for added radiocontrast agent. Radiocontrast agents are either injected into or administered through swallowing to examine anatomy and working of blood vessels, the genitourinary system or the gastrointestinal tract.
3. Computed tomography: CT imaging technique employ X-rays in coordination with computing algorithms to image the body in measured calculation. In CT, an X-ray generating tube opposite an X-ray detector (or detectors) in a ring shaped apparatus revolves around a patient and generate computer produced cross-sectional image (tomogram. In comparison to Radiography, CT can read finer details of the patient’s body. CT exposes the patient to more ionizing radiation than a radiograph.
4. Ultrasound: Medical ultrasonography uses ultrasound (high-frequency sound waves) to see soft tissue structures of the patient’s body. As the ultrasound process is devoid of ionization, its image quantity depends upon the person who is taking Ultra Sound. It has also limitation due to incapacity image through air like lungs, bowel, loops and bone. The implication of ultrasound in medical imaging had come over to upper surface in recent time and within 30 years.
5. Magnetic Resonance Imaging: MRI is the technique where strong magnetic fields are used to determine atomic nuclei (usually hydrogen protons) within body tissues to produce a better imaging quality as for purpose of diagnosing a patient.   MRI can produce images in axial, coronal, sagittal and multiple oblique planes with equal ease. It produces the best soft tissue contrast among all the imaging techniques. With development in scanning speed, spatial resolution, computer 3D algorithms and hardware, MRI has become quite handy in musculoskeletal radiology and neuroradiology.
6. Nuclear medicine: In Nuclear medicine imaging radiopharmaceuticals consisting of substances with affinity for certain body tissues labeled with radioactive tracer are administered to a patient. Tracers which are used mostly are Technetium-99m, Iodine-123, Iodine-131, Gallium-67 and Thallium-201. The heart, lungs, thyroid, liver, gallbladder, and bones are the organs which are tested using these conditions and techniques.
7. PET (positron emission tomography): This sort of scanning falls under the category of nuclear medicine. Under this type of scanning there a radioactive biologically active substance mostly Fluorine -18 Flurodeoxyglucose is injected into a patient and the radiation left out by the patient is used for producing multi-planer images of the body.