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Chest X-rayRead the Chest X-ray article » What is a chest X-ray?A chest X-ray is a radiology test that involves exposing the chest briefly to radiation to produce an image of the chest and the internal organs of the chest. An X-ray film is positioned against the body opposite the camera, which sends out a very small dose of a radiation beam. As the radiation penetrates the body, it is absorbed in varying amounts by different body tissues depending on the tissue's composition of air, water, blood, bone, or muscle. Bones, for example, absorb much of the X-ray radiation while lung tissue (which is filled with mostly air) absorbs very little, allowing most of the X-ray beam to pass through the lung.
What is a shadow on a chest X-ray?Due to the differences in their composition (and, therefore, varying degrees of penetration of the X-ray beam), the lungs, heart, aorta, and bones of the chest each can be distinctly visualized on the chest X-ray. The X-ray film records these differences to produce an image of body tissue structures and these are shadows seen on the X-ray. The white shadows on chest X-ray represent more dense or solid tissues, such as bone or heart, and the darker shadows on the chest X-ray represent air filled tissues, such as lungs. How is the chest X-ray procedure performed?Patients obtaining a chest X-ray will often be requested to use an X-ray gown, and extra metallic objects such as jewelry are removed from the chest and/or neck areas. These objects can block X-ray penetration, making the result less accurate. Patients may be asked to take a deep breath and hold it during the chest X-ray in order to inflate the lungs to their maximum, which increases the visibility of different tissues within the chest. The chest X-ray procedure often involves a view from the back to the front of the body as well as a view from the side. The view from the side is called a lateral ... Recommended Reading Related to Chest X-rayWhat is low blood pressure?Blood pressure is the force exerted by circulating blood on the walls of blood vessels. It constitutes one of the critically important signs of life or vital signs which include heart beat, breathing, and temperature. Blood pressure is generated by the heart pumping blood into the arteries modified by the response of the arteries to the flow of blood. An individual's blood pressure is expressed as systolic/diastolic blood pressure, for example, 120/80.The systolic blood pressure (the top number) represents the pressure in the arteries as the muscle of the heart contracts and pumps blood into them. The diastolic blood pressure (the bottom number) represents the pressure in the arteries as the muscle of the heart relaxes following its contraction. Blood pressure always is higher when the heart is pumping (squeezing) than when it is relaxing. The range of systolic blood pressure for most healthy adults falls between 90 and 120 mil... Other Related Chest X-ray ArticlesEmergency Contact for Daly City
Nearby Daly City Hospitals *![]() Seton Medical Center ![]() Kaiser Permanente South San Francisco Medical Center ![]() Laguna Honda Hospital & Rehabilitation Center ![]() St Luke's Hospital ![]() UCSF Medical Center at Parnassus ![]() California Pacific Medical Center Davies Campus ![]() San Francisco General Hospital ![]() St Mary's Medical Center ![]() San Francisco VA Medical Center ![]() Kaiser Permanente San Francisco Medical Center ![]() California Pacific Medical Center California Campus ![]() California Pacific Medical Center East Campus ![]() UCSF Medical Center at Mount Zion ![]() California Pacific Medical Center Pacific Campus ![]() Saint Francis Memorial Hospital ![]() Chinese Hospital ![]() Mills-Peninsula Health Services ![]() Seton Medical Center Coastside ![]() Mills Hospital ![]() Alameda Hospital ![]() Alta Bates Summit Medical Center Summit Campus ![]() San Mateo Medical Center ![]() Kaiser Permanente Medical Center at Oakland ![]() Children's Hospital & Research Center Oakland ![]() Alameda County Medical Center Highland Campus ![]() Alta Bates Summit Medical Center Herrick Campus ![]() Alta Bates Summit Medical Center Alta Bates Campus ![]() Marin General Hospital ![]() San Leandro Hospital ![]() Kentfield Rehabilitation & Specialty Hospital ![]() Kindred Hospital San Francisco Bay Area ![]() Sequoia Hospital ![]() Alameda County Medical Center Fairmont Campus ![]() John George Psychiatric Pavilion ![]() Doctor's Medical Center San Pablo ![]() Kaiser Permanente Redwood City Medical Center ![]() Eden Medical Center ![]() Kaiser Permanente Hayward Medical Center ![]() St Rose Hospital ![]() Kaiser Permanente San Rafael Medical Center ![]() Menlo Park Surgical Hospital ![]() Lucile Packard Children's Hospital ![]() Stanford Hospital & Clinics ![]() Kaiser Permanente Walnut Creek Medical Center ![]() VA Palo Alto Health Care System ![]() John Muir Medical Center Walnut Creek Campus ![]() Novato Community Hospital ![]() Washington Hospital ![]() San Ramon Regional Medical Center ![]() Contra Costa Regional Medical Center ![]() Fremont Hospital ![]() VA Northern CA Healthcare System at Martinez ![]() El Camino Hospital ![]() John Muir Behavioral Health Center ![]() John Muir Medical Center Concord Campus ![]() ValleyCare Health System Pleasanton ![]() St Helena Hospital Center for Behavioral Health ![]() Kaiser Permanente Vallejo Medical Center ![]() Sutter Solano Medical Center Featured Articles*Provider Directory Terms of Use: The WebMD 'Provider Directory' is provided by WebMD for use by the general public as a quick reference of information about Providers. The Provider Directory is not intended as a tool for verifying the credentials, qualifications, or abilities of any Provider contained therein. Inclusion in the Provider Directory does not imply recommendation or endorsement nor does omission in the Provider Directory imply WebMD disapproval. |





























































