ABSTRACT
An indicator of operating technique (phantom) is very useful for quality control in diagnostic radiology. We tested experimentally that the "Random Phantom" is the most suitable between those commercially available for xeromammography. In fact this indicator points out image quality alterations caused even by very small variations of the physical parameters affecting image quality. We did not test the phantoms for mammographic technique but we believe that the "Random" is the most suitable in this field too.
Subject(s)
Mammography/instrumentation , Xeromammography/instrumentation , Humans , Quality Control , Technology, RadiologicABSTRACT
Basic calcium phosphate (BCP) crystal deposition can lead to periarticular collections associated with typical radiographic findings, most frequently observed in the shoulder. Moreover, these deposits may be revealed in other articular sites (i.e., wrist, hand, foot, elbow, hip, etc.). Initially, the calcium deposits may appear poorly defined (cloudlike); afterwards, they may reveal different patterns (linear, triangular or circular areas), changing in size, configuration and site. Adjacent bone may be normal, although osteoporosis, cystic lesions and reactive sclerosis are reported. The radiographic appearance of calcifications will depend upon the exact location of the deposits in the specific tendon of the rotator cuff, the adjacent bursae and the soft tissues.
Subject(s)
Calcinosis/diagnostic imaging , Calcium Phosphates/metabolism , Shoulder Joint , Adult , Aged , Calcinosis/metabolism , Crystallization , Female , Humans , Male , Middle Aged , Radiography , Shoulder Joint/diagnostic imaging , Tendons/diagnostic imaging , Tendons/metabolismABSTRACT
The cortical margin of the inferior end plate of lumbar vertebral bodies, in the frontal projection, frequently simulates the curvature of a bow, aimed cephalad. On lateral view, the two concavities are superimposed and lie in the posterior portion of the vertebral body. The aspect, called "Cupid's bow" must be considered a normal anatomic variant and should not be confused with diseases affecting the spine. The incidence and degree of the finding are discussed.
