What is X-RAY
An X-Ray (radiograph) is a noninvasive medical test that helps physicians diagnose and treat medical conditions. Imaging with x-rays involves exposing a part of the body to a small dose of ionizing radiation to produce pictures of the inside of the body. X-rays are the oldest and most frequently used form of medical imaging.The latest modalities include computed radiography and direct radiography. These are the latest aids in high resolution x-ray imaging.
What happens during an X-ray test?
The X-rays are produced by an electrical machine and the patient stands between the machine and a special screen used for obtaining the image. Patients are asked to remove any metal objects, such as watches and jewellery, that might appear on the picture and cause confusion.The patient is asked to keep as still as possible for the few seconds it takes for each image to be obtained. The procedure is entirely painless and there are no side effects. The pictures are checked for technical quality by the radiographer and then sent off to the radiologist for reporting.
Is X-ray radiation dangerous – I?
It is one of the ironies of radiological practice that X-rays can both cause cancer and be used to treat it. Nowadays, with the use of very small doses of radiation to produce high quality X-ray images, the risk of cancer after properly supervised X-ray examinations is extremely small; so small as to be of no consequence to any individual.
Is X-ray radiation dangerous – II?
Because staff in the X-ray department work with X-rays all the time they would, if they stayed beside every patient, over the course of time, be exposed to quite a high dose of radiation. This is why they go behind a
screen when the X-ray beam is switched on. The cumulative effect would be significant for them in a way that it is not significant for an individual patient.
Is X-ray radiation dangerous – III?
Radiation can cause damage to a foetus, which is why, as far as possible, the use of X-rays during pregnancy is kept to the absolute minimum. Any woman who suspects that she is pregnant, and who has been referred for an X-ray examination, should make sure that the radiographers and doctors caring for her know about her condition.
Digital radiography & conventional radiography – I
Digital radiography is a form of x-ray imaging, where digital X-ray sensors are used instead of traditional photographic film. Advantages include time efficiency through bypassing chemical processing and the ability to digitally transfer and enhance images. Also less radiation can be used to produce an image of similar contrast to conventional radiography.
Digital radiography & conventional radiography – II
Digital Radiography (DR) or (DX) is essentially filmless X-ray image capture. In place of X-ray film, a digital image capture device is used to record the X-ray image and make it available as a digital file that can be presented for interpretation and saved as part of the patient’s medical record.
Digital radiography & conventional radiography – III
The advantages of DR over film include immediate image preview and availability, a wider dynamic range which makes it more forgiving for overand under-exposure as well as the ability to apply special image
processing techniques that enhance overall display of the image. The simplest way to describe the basis of digital technology is for the average person to relate to their personal camera.