Storage Phosphor Digital Radiography in Portable Chest Imaging: Comparison of Image Quality with Conventional Film-Screen System with Variation of mAs

Abstract Aim To compare digital panoramic images acquired for the presurgical assessment of third molars captured with a storage phosphorbased system with conventional film panoramic radiographs. Methods and Materials A total of 51 pairs of digital and conventional panoramic images, made simultaneously, were included in this study. The images were evaluated for diagnostic quality prior to third molar surgery by two experienced oral surgeons and rated with a four-point grading scale. Results Despite the fact that conventional panoramic images were rated higher than the digital images, the difference was not statistically significant. Conclusions Conventional and digital panoramic images were found to be of comparable image quality with regard to their diagnostic contribution to third molar surgery. Clinical Significance This study is contributory to understanding differences in image quality between digital and conventional panoramic radiography for certain diagnostic tasks. The lack of significant differences in image quality may be an endorsement for digital panoramic radiography. Citation Parissis N, Angelopoulos C, Mantegari S, Karamanis S, Masood F, Tsirlis A. A Comparison of Panoramic Image Quality between a Digital Radiography Storage Phosphor System and a Film-Based System. J Contemp Dent Pract [Internet]. 2010 Jan; 11(1):009-016. Available from: http://www.thejcdp.com/journal/view/ volume11-issue1-parissis.

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Phantom Study of Chest Radiography with Storage Phosphor, Selenium, and Film-Screen Systems

Acta Radiologica ◽

10.1177/02841851960371p170 ◽

1996 ◽

Vol 37 (1P1) ◽

pp. 332-336 ◽

Cited By ~ 2

Author(s):

M. Kehler ◽

K. Lyttkens ◽

B. Andersson ◽

P. Hochbergs ◽

C.-G. Lindberg ◽

...

Keyword(s):

Computed Radiography ◽

The Other ◽

Lung Tumour ◽

Operating Characteristics ◽

Storage Phosphor ◽

Conventional Film ◽

Screen System ◽

Test Objects ◽

Better Than ◽

Storage Phosphor System

Purpose: Chest radiographs from 3 digital systems − 2 based on luminescent phosphors and one on selenium — and a conventional film-screen system were evaluated and compared. Material and Methods: Computed radiography (CR) has for the past years been dominated by a single manufacturer, but now several systems have been marketed. Using a chest phantom and, as test objects, 2 simulated tumours for the lung and mediastinum, respectively, and one object simulating pulmonary lines, a total of 400 exposures were made, 100 on each system. The test objects were placed randomly with a ratio of presence/absence of each object of about 50. Six radiologists participated, 2 residents and 4 staff members. A receiver operating characteristics (ROC) analysis was performed with construction of curves, and the difference between the curves was estimated with a 2-tailed paired t-test. Results and Conclusion: The selenium-based system performed significantly better for pulmonary line detection than all the other systems, and better than one storage phosphor system for the lung “tumour” (p<0.05), while one storage phosphor system was slightly better than the other in diagnosing all 3 test objects. The score for the film-screen system was only average.

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Portable chest imaging: comparison of storage phosphor digital, asymmetric screen-film, and conventional screen-film systems.

Radiology ◽

10.1148/radiology.186.2.8421740 ◽

1993 ◽

Vol 186 (2) ◽

pp. 387-393 ◽

Cited By ~ 35

Author(s):

L T Niklason ◽

H P Chan ◽

P N Cascade ◽

C L Chang ◽

P W Chee ◽

...

Keyword(s):

Chest Imaging ◽

Storage Phosphor ◽

Portable Chest

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Assessment of image quality and radiation dose in some models of digital radiography systems – A Pehamed FLUORAD A + D phantom study

Radioprotection ◽

10.1051/radiopro/2018012 ◽

2018 ◽

Vol 53 (2) ◽

pp. 139-144

Author(s):

H. Kaheni ◽

A. Chaparian ◽

R. Nafisi-Moghadam ◽

N. Hamzian

Keyword(s):

Image Quality ◽

Radiation Dose ◽

Digital Radiography ◽

Quality Parameters ◽

Digital Systems ◽

Quality Performance ◽

Dose Area Product ◽

Ideal Situation ◽

Conventional Film ◽

Area Product

Digital radiography (DR) systems have been recently introduced as a developed technology that is replacing conventional film–screen systems in many countries around the world. Ideal situation in radiography is to maximize the image quality while minimizing the patient dose. The purpose of this study was to compare image quality and radiation dose in different digital radiography systems. Four different digital systems are compared in terms of their image quality performance and dose area product (DAP). Images of Pehamed FLUORAD A + D phantom were obtained for each DR system. Image quality parameters (contrast resolution (CR), spatial resolution (SR), and contrast-to-noise ratio (CNR)) and DAP were significantly different between different digital systems. It was shown that all four quantities increased with increasing exposure parameters in all systems. Image quality parameters of the SEDECAL system were higher than that in other systems (p ≤ 0.05). At the stable DAP (100 mGy.cm2), means of CR, CNR, and SR in the SEDECAL system were 6.38 ± 0.797, 29.70 ± 0.85 and 3.10 ± 0.38 lp/mm, respectively. The results of this investigation can be taken into consideration in the selection and purchasing of new systems in order to preserve patients as well as radiographers from unnecessary radiation dose.

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Digital Radiography of the Spine, Large Bones and Joints Using Stimulable Phosphor

Acta Radiologica ◽

10.1177/028418518802900302 ◽

1988 ◽

Vol 29 (3) ◽

pp. 267-271 ◽

Cited By ~ 18

Author(s):

H. Pettersson ◽

P. Aspelin ◽

E. Boijsen ◽

K. Herrlin ◽

N. Egund

Keyword(s):

Soft Tissue ◽

Radiation Dose ◽

Digital Radiography ◽

High Spatial Resolution ◽

Halo Effect ◽

Film System ◽

Unsharp Masking ◽

Conventional Film ◽

Screen System ◽

Radiologic Features

The value of digital radiography in musculoskeletal disorders was investigated by assessing its ability to depict anatomic structures and common radiologic features as compared with the conventional film-screen combination. The digital image that was frequency modified was superior to conventional films in delineating soft tissue structures and for areas with large attenuation differences. The conventional film-screen system was superior in depicting small anatomic structures and in identifying the zone close to prostheses. This was explained by the high spatial resolution of the conventional film system and the disturbing halo effect around the prosthesis seen with digital images. The halo effect is an overshoot caused by the unsharp masking operator, which was in this series not changed for individual examinations. The exposure (radiation dose) could be reduced to 50 per cent using the digital system, without any loss of information.

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