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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 Castro Valley
Nearby Castro Valley Hospitals *![]() Eden Medical Center ![]() Alameda County Medical Center Fairmont Campus ![]() John George Psychiatric Pavilion ![]() Kindred Hospital San Francisco Bay Area ![]() San Leandro Hospital ![]() St Rose Hospital ![]() Kaiser Permanente Hayward Medical Center ![]() San Ramon Regional Medical Center ![]() Alameda Hospital ![]() ValleyCare Health System Pleasanton ![]() Alameda County Medical Center Highland Campus ![]() Washington Hospital ![]() Fremont Hospital ![]() Alta Bates Summit Medical Center Summit Campus ![]() Kaiser Permanente Medical Center at Oakland ![]() Kaiser Permanente Walnut Creek Medical Center ![]() Children's Hospital & Research Center Oakland ![]() Alta Bates Summit Medical Center Alta Bates Campus ![]() Alta Bates Summit Medical Center Herrick Campus ![]() John Muir Medical Center Walnut Creek Campus ![]() Mills Hospital ![]() Kaiser Permanente Redwood City Medical Center ![]() San Mateo Medical Center ![]() Menlo Park Surgical Hospital ![]() Valley Memorial Hospital ![]() Sequoia Hospital ![]() Mills-Peninsula Health Services ![]() San Francisco General Hospital ![]() Lucile Packard Children's Hospital ![]() Livermore Division of the VA Palo Alto Healthcare System ![]() St Luke's Hospital ![]() Stanford Hospital & Clinics ![]() Chinese Hospital ![]() Saint Francis Memorial Hospital ![]() Kaiser Permanente South San Francisco Medical Center ![]() California Pacific Medical Center Davies Campus ![]() California Pacific Medical Center Pacific Campus ![]() John Muir Medical Center Concord Campus ![]() John Muir Behavioral Health Center ![]() UCSF Medical Center at Mount Zion ![]() Kaiser Permanente San Francisco Medical Center ![]() VA Palo Alto Health Care System ![]() Laguna Honda Hospital & Rehabilitation Center ![]() VA Northern CA Healthcare System at Martinez ![]() St Mary's Medical Center ![]() UCSF Medical Center at Parnassus ![]() California Pacific Medical Center East Campus ![]() California Pacific Medical Center California Campus ![]() Seton Medical Center ![]() Contra Costa Regional Medical Center ![]() Doctor's Medical Center San Pablo ![]() El Camino Hospital ![]() San Francisco VA Medical Center ![]() Sutter Delta Medical Center ![]() Kaiser Permanente Santa Clara Medical Center ![]() Seton Medical Center Coastside ![]() Regional Medical Center of San Jose ![]() O'Connor Hospital ![]() Santa Clara Valley Medical Center ![]() Marin General Hospital ![]() Kentfield Rehabilitation & Specialty Hospital ![]() El Camino Hospital of Los Gatos ![]() St Helena Hospital Center for Behavioral Health ![]() Kaiser Permanente Vallejo Medical Center ![]() Sutter Solano Medical Center ![]() Good Samaritan Hospital San Jose ![]() Good Samaritan Hospital Mission Oaks ![]() Kaiser Permanente San Rafael Medical Center ![]() Kaiser Permanente San Jose 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. |







































































