Almost as soon as X-ray machines became available for use in medicine images were being taken of flowers etc.
Delicious Radiography Plain X-rays Despite the development of newer technologies such as computed tomography CTultrasound imaging and magnetic resonance imaging MRIplain film X-rays remain an important tool for the diagnosis of many disorders.
In radiography, a beam of X-rays, produced by an X-ray generator, is transmitted through an object, e. The X-rays are absorbed by the material they pass through in differing amounts depending on the density and composition of the material. X-rays that are not absorbed pass through the object and are recorded on X-ray sensitive film Figure 1 1.
The basic setup for X-ray imaging. The collimator restricts the beam of X-rays so as to irradiate only the region of interest. The antiscatter grid increases tissue contrast by reducing the number of detected X-rays that have been scattered by tissue. While bone absorbs X-rays particularly well, soft tissue such as muscle fiber, which has a lower density than bone, absorbs fewer X-rays.
This results in the familiar contrast seen in X-ray images, with bones shown as clearly defined white areas and darker areas of tissue Figure 2 2. This makes conventional X-rays very suitable for scans of bones and tissue dense in calcium such as in dental images and detection of bone fractures.
Other uses of radiography include the study of the organs in the abdomen, such as the liver and bladder; chest radiography for diseases of the lung, such as pneumonia or lung cancer and mammography to screen for breast cancer.
X-ray fluoroscopy is used to detect a number of diseases associated with the stomach and intestine, genitals and urinary tract. A typical X-ray radiograph of the chest, in which the regions of bone appear white.
Digital X-rays, which overcome these problems, have therefore become increasingly popular in radiography.
Similar to a digital camera, an electronic detector is used instead of film. X-ray imaging provides fast, high-resolution images and is relatively inexpensive.
The average examination for most plain film examinations takes no more than 10—15 minutes and requires no special preparation of the patient. The X-ray picture is stored on a piece of film called a radiograph. These are interpreted by a physician specially trained to interpret them, known as a radiologist.
The ionizing radiation used in the production of X-ray images is carcinogenic and continuous exposure to these rays over time may cause damage to the body and increase the risk of cancer.
However, experts consider the benefits of an accurate diagnosis and treatment to far outweigh the comparatively small risk involved in X-ray imaging.
Since the developing embryo is much more sensitive to the effects of ionizing radiation than adult patients, X-rays of any part of the body are not recommended for pregnant women.
The risks of X-rays are greater for young children and unborn babies and the doctor will always bear this in mind when deciding on the need for medical imaging.
Aug 17, 2. Courtesy of Klinikum St.
Marien Amberg, Germany Last updated: Mar 6, Trustworthy Health Information This website has been submitted to the Health On the Net Foundation, an independent body that promotes quality, objective and transparent online health information, for HON code certification. Siemens About Us This website is an initiative of Siemens Healthineers to provide patients and healthcare professionals with information about the use of radiation in medical imaging.Nov 08, · On Nov.
8, , German scientist Wilhelm Roentgen’s experiments with cathode rays led him to discover X-rays, a feat that earned him the first-ever Nobel Prize for Physics.
Discovery of the X-Ray In , Wilhelm Conrad Roentgen was the director of the physics department at the University of Wurtzburg and an active professor there. X-ray is a term that refers to a beam of energy. Dental radiograph A photographic image produced on an image receptor by passage of the x-rays through the teeth and related structures.
Peter Shull, an associate professor of engineering at Penn State University, is the fourth co-author.. The scientific treatise grew out of decades of research and practical experience building and using X-ray imaging and nondestructive evaluation systems at LLNL and studies in academia. Sep 08, · Radiography, the use of X-rays to view unseen or hard-to-see objects, began in when the first X-ray machine was built by Wilhelm Roentgen.
This technology was almost immediately taken up by medicine, and became an important medical speciality called radiology. X-ray viewing machine. Historical artwork of the fluoroscope designed and built by the French inventor Eugene Ducretet ().
This device was used to examine postal packets and parcels using X-rays. • During World War I, Curie used her radiography expertise to set up dozens of mobile and permanent X-ray stations, which helped doctors diagnose and treat battlefield injuries.