A noninvasive method for assessing BODY COMPOSITION. It is based on the differential absorption of X-RAYS (or GAMMA RAYS) by different tissues such as bone, fat and other soft tissues. The source of (X-ray or gamma-ray) photon beam is generated either from radioisotopes such as GADOLINIUM 153, IODINE 125, or Americanium 241 which emit GAMMA RAYS in the appropriate range; or from an X-ray tube which produces X-RAYS in the desired range. It is primarily used for quantitating BONE MINERAL CONTENT, especially for the diagnosis of OSTEOPOROSIS, and also in measuring BONE MINERALIZATION
Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
--subdivision Radiography--Positioning under individual organs and regions of the body, e.g. Heart--Radiography--Positioning; Foot--Radiography--Positioning
Radiographie en médecine vétérinaire. : Clinical radiology of the horse / Janet A. Butler, Christopher M. Colles, Sue J. Dyson, Svend E. Kold, Paul W. Poulos
Radiographie Estomac : Radiology of the stomach and duodenum / A.H. Freeman, E. Sala (eds.) ; with contributions by K. Balan [and others] ; foreword by A.L. Baert
radiographie Maladie du système nerveux central : Pediatric neuroradiology / [edited by] Paolo Tortori-Donati and Andrea Rossi ; in collaboration with Roberta Biancheri ; foreword by Charles Raybaud
Radiographie Système nerveux : Pediatric neuroradiology / [edited by] Paolo Tortori-Donati and Andrea Rossi ; in collaboration with Roberta Biancheri ; foreword by Charles Raybaud
Radiography -- adverse effects : An introduction to radiation protection in medicine / edited by Jamie V. Trapp, Queensland University of Technology, Brisbane, Australia, Tomas Kron, Peter MacCallum Cancer Centre, Melbourne, Australia
