energy subtraction

energy subtraction

digital radiography using higher- and lower-energy exposures, either by double exposure at 2-kV levels or by interposing a copper filter that absorbs the lower-energy photons between two phosphor plates, with computer calculation of high-Z and low-Z images (bone and soft tissues, respectively); makes use of the fact that lower-energy x-rays are absorbed by more high-Z substances, such as calcium and copper, because of the photoelectric effect.
See also: Z, photoelectric effect, phosphor plate.

energy subtraction

a radiographic technique in which two different x-ray beams are used alternately to provide a subtraction image resulting from differences in photoelectric interaction.

en·er·gy sub·trac·tion

(en'ĕr-jē sŭb-trak'shŭn)
Digital radiography using higher- and lower-energy exposures, either by double exposure at 2-kV levels or by interposing a copper filter that absorbs the lower-energy photons between two phosphor plates, with computer calculation of high-Z and low-Z images (bone and soft tissues, respectively); makes use of the fact that lower-energy x-rays are absorbed by more high-Z substances, such as calcium and copper, because of the photoelectric effect.
References in periodicals archive ?
The RADspeed Pro EDGE employs cutting-edge technologies like tomosynthesis, speed stitch, and dual energy subtraction.
A flexible fully automated positioning system, offering a broad range of easy-to-use advanced applications including tomosynthesis, energy subtraction, and long length imaging--giving facilities the tools they need to better support challenging exams and diagnosis.
Dual energy subtraction radiography--Adding critical information to the diagnosis of chest disease.
The technology is used in the company's ClearRead +Detect[TM] software, an application that identifies and circles potentially cancerous lung nodules on a bone-suppressed chest X-ray image, and/or images captured by modalities such as dual energy subtraction (DES).
DAYTON, Ohio -- Software by Riverain Technologies significantly improves radiologists' ability to detect potentially cancerous lung nodules in X-ray images, and might be a cost-effective alternative to dual energy subtraction (DES) imaging, according to two new studies being presented at the 20th Anniversary Meeting of the European Society of Thoracic Imaging (ESTI), June 22-24, in London.
Dual Energy Subtraction - GE's outstanding digital X-ray applicationeliminates overlying bone obstruction from chest or abdominal images.
Advanced Applications on Discovery XR640: Advanced applications offered on the Discovery XR640, including Dual Energy Subtraction, VolumeRAD[TM] (digital tomography) and Auto Image Paste have changed the ways GE customers think about X-ray and how to best use the technology with their patient populations.
GE's Dual Energy Subtraction, a first-of-its-kind digital X-ray technology, can help doctors see these "hidden" lung cancers by displaying a digital image of only the soft tissue in the chest - without the bones - allowing doctors to better detect and diagnose lung cancer.
GE has proven itself the leader in DR imaging by introducing advanced applications, such as dual energy subtraction.
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