Related Experiment Videos
Physical and clinical evaluation of a 2,048 x 2,048-matrix image intensifier TV digital imaging system in bone
Y Higashida1, Y Baba, M Hatemura
1Department of Radiological Technology, Kumamoto University College of Medical Science, Japan.
Rationale And Objectives:
To evaluate the potential utility of a 2,048 x 2,048-matrix image intensifier television digital radiography (DR) system versus a conventional screen-film (S-F) system for bone radiography.
Methods:
Basic imaging properties were evaluated including resolution properties, Wiener spectra, and detectabilities of low-contrast signals. DR images were obtained with the same exposure (iso-dose) or one-third the exposure (low-dose) used with the S-F system. The visibility of pathologic details of metastatic disease on bone radiographs of 27 patients was evaluated subjectively by six radiologists.
Results:
Resolution properties of the DR system were slightly superior to those of the S-F system at low-frequency range, but the S-F system showed considerably higher resolution properties at the high-frequency range. The noise levels for iso-dose DR were slightly greater than those for S-F imaging at low spatial frequency; however, low-dose digital radiographs showed higher noise levels. Visibility of details of diagnostic features on bone radiographs was similar with both systems, but the low-dose digital radiographs were slightly inferior.
Conclusion:
High-resolution image intensifier television DR systems may be clinically useful for bone radiography.