PURPOSE To evaluate the effect of a temporal subtraction technique for digital chest radiography with regard to the accuracy of detection of lung nodules. MATERIALS AND METHODS Twenty solitary lung nodules smaller than 30 mm in diameter, including 10 lung cancers and 10 benign nodules, were used. The nodules were grouped subjectively according to their subtlety. For non-nodular cases, 20 nodu...

OBJECTIVES To verify whether changes in bone mass induced by glucocorticoid and bisphosphonate can be detected by digital subtraction radiography of lateral X-rays in female rat mandibles. METHODS 36 Rattus norvegicus (Wistar) females were randomly allocated to three groups: Group 1, control (n = 12); Group 2, induced osteopaenia (n = 12); and Group 3, induced osteopaenia plus risedronate (n ...

background: there is a controversy about exact time of bone healing. the aim of this study was evaluation of bone formation and change of density after mandibular third molar extraction.     methods: radiographs were taken from 16 empty tooth sockets immediately after extraction of mandibular third molars and 2, 4 and 6 months later under similar condition. the radiographs were digitized and th...

introduction proper cleaning and shaping of the root canal system is one of the most important aspects of endodontic therapy. to estimate the canal length before instrumentation in endodontic treatment, traditionally, conventional radiographic techniques and, recently, direct digital radiography (ddr) are applied. the application of computer technology in radiography has allowed less exposure t...

Most interventional pain physicians are experts in the use of fluoroscopy and understand its importance in improving the safety, accuracy and efficacy of diagnostic and therapeutic procedures. The addition of digital subtraction may enhance the utility of radiography and improve the accuracy of our interpretations. This article illustrates the use of the technique in several patients. The utili...

A 41-year-old patient with a history of low back pain underwent conventional radiography, CT, digital subtraction angiography (DSA), and MR imaging. An inhomogeneous sclerotic-lytic lumbar vertebra with slightly thickened spongiotic structure and intense contrast enhancement were compatible with an L4 vertebral hemangioma. Embolization and posterior surgical osseous decompression was performed....

background and aims. early diagnosis of external root resorption is important for accurate treatment. the purpose of this study was to compare the efficacy of a charge-coupled device (ccd) sensor and a photostimulable phosphor (psp) plate receptor in the diagnosis of artificial external root resorption. materials and methods. in this diagnostic in-vitro study, 40 maxillary incisors were mounted...