Conventional radiographic examination of the human body dates back to the genesis of diagnostic radiology in 1895 when Wilhelm Roentgen produced the first x-ray film image of his wife’s hand. Conventional radiography remains fundamental to the practice of diagnostic imaging. X-ray is an imaging technique that has been used to show up abnormalities in bones and certain body tissue.
X-rays are a type of high-energy radiation that is like light waves but higher in energy. An X-ray machine can produce short bursts of X-rays that pass easily through fluids and soft tissues of the body but are blocked by dense tissue such as bone.
Computed Radiography (CR)
A filmless system that eliminates chemical processing and provides digital radiographic images. CR substitutes a phosphor imaging plate for the film-screen cassette. Available CR cassette sizes match those available for traditional film-screen cassettes. The same x-ray tube, exposure control systems, and cassette holders as used in conventional radiography are used for CR. The phosphor-coated imaging plate interacts with x-rays transmitted through the patient to capture a latent image. The phosphor plate is placed within a reading device that scans the plate with a helium-neon laser, emitting light, which is captured by a photomultiplier tube and processed into a digital image. The CR receptor is erased with white light and is used repeatedly. The digital image is transferred to a computerized picture archiving and communication system (PACS). The PACS stores and transmits digital images via computer networks to give physicians and health care providers in many locations simultaneous instant access to the diagnostic images.
Digital Radiography (DR)
Provides a filmless and cassette less system for capturing x-ray images in digital format. DR substitutes a fixed electronic detector or charge-coupled device (CCD) for the film-screen cassette or phosphor imaging plate. Direct read-out detectors produce an immediate digital radiographic image. Most DR detectors are installed in a fixed bucky, thus limiting the ability of the system to obtain images portably at the patient’s bedside but the advantage is it give us instant image result thus quicker time.
Here, we have 4 conventional radiography units(3 PHILIPS, 1 GE) with KODAK CR system and 1 PHILIPS Digital Radiography unit. In current time, we also equipped with 7(1 SIEMENS, 3 SHIMADZU, 3 GE) mobile unit allocated at dedicated placed in the hospital.
All x-ray images in the 24 working hours are processed, stored and can be accessed by doctor through Picture Archiving and Communication System (PACS).
In our Department of Radiology HUSM, the plain radiography modalities are offered for diagnostic purpose at 365 days without gap time to fulfill the need from wards and trauma center workload cases.