Clinical Technique: Digital Radiography in Exotic Pets—Important Practical Differences Compared with Traditional Radiography

Ludewig, Eberhard; Pees, Michael; Morgan, Joe P.

doi:10.1053/j.jepm.2011.11.006

Cited by 6 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In comparison to screen-film radiography however, digital radiography is limited in its spatial resolution 2 . Image quality in digital radiographs depends on the intrinsic sharpness and noise level of the detector system, with noise being the limiting factor in object detection, while screen-film systems are contrast limited 3 . In digital radiography two different approaches have been developed.…”

Section: Introductionmentioning

confidence: 99%

Needle-based storage-phosphor detector radiography is superior to a conventional powder-based storage phosphor detector and a high-resolution screen-film system in small patients (budgerigars and mice)

Tebrün

Ludewig

Köhler

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

This method comparison study used radiographs of 20 mice and 20 budgerigars to investigate comparability between computed radiography (CR) and high-resolution screen-film systems and study the effects of reduced radiation doses on image quality of digital radiographs of small patients. Exposure settings used with the mammography screen-film system (SF) were taken as baseline settings. A powder-based storage-phosphor system (CR P ) and a needle-based storage-phosphor system (CR N ) were used with the same settings (D/100%) and half the detector dose (D/50%). Using a scoring system four reviewers assessed five criteria per species covering soft tissue and bone structures. Results were evaluated for differences between reviewers (interobserver variability), systems and settings (intersystem variability, using visual grading characteristic analysis). Correlations were significant (p ≤ 0.05) for interobserver variability in 86.7% of the cases. Correlation coefficients ranged from 0.206 to 0.772. For mice and budgerigars, the CR N system was rated as superior to the SF and CR P system for most criteria, being significant in two cases each. Comparing the SF and CR P system, the conventional method scored higher for all criteria, in one case significantly. For both species and both digital systems, dose reduction to 50% resulted in significantly worse scores for most criteria. In summary, the needle-based storage-phosphor technique proved to be superior compared to the conventional storage-phosphor and mammography screen-film system. Needle-based detector systems are suitable substitutes for high-resolution screen–film systems when performing diagnostic imaging of small patients. Dose reduction to 50% of the corresponding dose needed in high-resolution film-screen systems cannot be recommended.

show abstract

Section: Introductionmentioning

confidence: 99%

Needle-based storage-phosphor detector radiography is superior to a conventional powder-based storage phosphor detector and a high-resolution screen-film system in small patients (budgerigars and mice)

Tebrün

Ludewig

Köhler

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…With the transition from screen film to digital radiography, reptile medicine was faced with the advantages and disadvantages of the new technology. Digital systems provide advantages such as a greater dynamic range, data transfer, a linear signal response, post-processing, and storage possibilities [9][10][11][12][13][14]. Even though screen-film systems have a superior spatial resolution, digital systems can differentiate very small attenuation differences better [12].…”

Section: Introductionmentioning

confidence: 99%

“…Based on these results, the comparison of different digital systems amongst each other and the implementation of dose requirements for valuable diagnostic images is of great interest [11,13,16]. For a basic understanding, today, in veterinary medicine, different digital detector systems with different advantages are used: First, digital detector systems can further be divided into computed radiography (CR) and direct radiography (DR) [10,14,17,18]. DR includes flat panel systems, where a scintillator converts incoming X-rays directly into light [10,18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radiation Dose Reduction in Different Digital Radiography Systems: Impact on Assessment of Defined Bony Structures in Bearded Dragons (Pogona vitticeps)

Steiner

Ludewig

Tebrün³

et al. 2023

Animals

Self Cite

View full text Add to dashboard Cite

Three different digital detector systems were used to study the effect of a defined radiation dose reduction on the image quality of digital radiographs in bearded dragons (Pogona vitticeps). A series of radiographs of seven bearded-dragon cadavers with a body mass ranging from 132 g to 499 g were taken in dorsoventral projection. The digital systems employed included two computed radiography systems (CR) (one system with a needle-based and one with a powdered-based scintillator) and one direct radiography system (DR). Three levels of the detector dose were selected: A standard dose (defined based on the recommended exposure value of the CRP, D/100%), a half dose (D/50%), and a quarter dose (D/25%). Four image criteria and one overall assessment were defined for each of four anatomic skeletal regions (femur, rib, vertebra, and phalanx) and evaluated blinded by four veterinarians using a predefined scoring system. The results were assessed for differences between reviewers (interobserver variability), radiography systems, and dosage settings (intersystem variability). The comparison of the ratings was based on visual grading characteristic (VGC) analysis. Dose reduction led to significantly lower scores in all criteria by every reviewer, indicating a linear impairment of image quality in different skeletal structures in bearded dragons. Scores did not differ significantly between the different systems used, indicating no advantage in using a computed or direct radiography system to evaluate skeletal structures in bearded dragons. The correlation was significant (p ≤ 0.05) for interobserver variability in 100% of the cases, with correlation coefficients between 0.50 and 0.59. While demonstrating the efficacy of the use of digital radiography in bearded dragons and the similar quality in using different computed or direct radiography systems, this study also highlights the importance of the appropriate level of detector dose and demonstrates the limits of post-processing algorithm to compensate for insufficient radiation doses in bearded dragons.

show abstract

Radiography—General Principles

Holmes¹,

Divers²

2019

Mader's Reptile and Amphibian Medicine and Surgery

View full text Add to dashboard Cite

Clinical Technique: Digital Radiography in Exotic Pets—Important Practical Differences Compared with Traditional Radiography

Cited by 6 publications

References 29 publications

Needle-based storage-phosphor detector radiography is superior to a conventional powder-based storage phosphor detector and a high-resolution screen-film system in small patients (budgerigars and mice)

Needle-based storage-phosphor detector radiography is superior to a conventional powder-based storage phosphor detector and a high-resolution screen-film system in small patients (budgerigars and mice)

Radiation Dose Reduction in Different Digital Radiography Systems: Impact on Assessment of Defined Bony Structures in Bearded Dragons (Pogona vitticeps)

Radiography—General Principles

Contact Info

Product

Resources

About