J Korean Radiol Soc.
1987 Feb;23(1):154-160. 10.3348/jkrs.1987.23.1.154.
Comparison of the image quality of digital radiography system and film-screen system; radiologists' rating ofthe visibility of normal anatomic
- KMID: 2359670
- DOI: http://doi.org/10.3348/jkrs.1987.23.1.154
Abstract
- Digital image aquisition and display is widely used in CT, ultrasonography, digital subtraction angiography, nuclear medicine and magnetic resonance image. But most of the radiological examinations performed in radiologydepartement are made by using conventional film-screen system. The development of the digital radiography systemis essential if totally digitized radiology departement is desired. The advantages of digitizing the radiographic information are usually discussed in terms of PACS (picture archiving and communication system), furthermore thereare many other advantages such as contrast modification, spatial filtering, subtraction and superimposition of the images through the image processing by computer. Currently several composed of photosimulable phosphors such asbarium fluorohalide crystal read with a He-Ne laster ot produce digital radiographic imags. Another promising approach is scan projection radiography. The authors performed the clinical study of comparing the image qualitiesof digital radiography system using scanning laser luminiscence(FCR) and conventional film-screen system in ChestPA, skull radiography and K.U.B. in terms of the visibility of the normal anatomic structure ratingthose(qualities) on a scale of 0 to 3 and obtained the following results. Normal contrast digital images arecomparable to conventional film-screen images, but the images of high frequency enhancement is far superior to conventional film-screen images especially in peripherally located structures such as skin, subcutaneous fat, musculoskeletal systems, nasal bone, inner and outer table of the skull including the diploic space, paranasalsinuses, nasopharynx and laryns, trachea and main bronchi, mediastinal sturctures, retrocardiac and subphrenic vascular markings. Another promising aspects of digital radiography system in the examinations using portable unitand fluoroscopy.
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