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Impact of JPEG lossy image compression on quantitative digital subtraction radiography.
Dentomaxillofac Radiol. 2002 Mar; 31(2):106-12.DR

Abstract

OBJECTIVES

The aim of the study was to evaluate the impact of JPEG lossy image compression on the estimation of alveolar bone gain by quantitative digital subtraction radiography (DSR).

METHODS

Nine dry domestic pig mandible posterior segments were radiographed three times ('Baseline', 'No change', and 'Gain') with standardized projection geometry. Bone gain was simulated by adding artificial bone chips (1, 4, and 15 mg). Images were either compressed before or after registration. No change areas in compressed and subtracted 'No change-Baseline' images and bone gain volumes in compressed and subtracted 'Gain-Baseline' images were calculated and compared to the corresponding measurements performed on original subtracted images.

RESULTS

Measurements of no change areas ('No change-Baseline') were only slightly affected by compressions down to JPEG 50 (J50) applied either before or after registration. Simulated gain of alveolar bone ('Gain-Baseline') was underestimated when compression before registration was performed. The underestimation was bigger when small bone chips of 1 mg were measured and when higher compression rates were used. Bone chips of 4 and 15 mg were only slightly underestimated when using J90, J70, and J50 compressions before registration.

CONCLUSIONS

Lossy JPEG compression does not affect the measurements of no change areas by DSR. Images undergoing subtraction should be registered before compression and if so, J90 compression with a compression ratio of 1:7 can be used to detect and measure 4 mg and larger bone gain.

Authors+Show Affiliations

Fidler A
University of Ljubljana, Faculty of Medicine, Department of Stomatology, Slovenia.
Likar B
No affiliation info available
Pernus F
No affiliation info available
Skaleric U
No affiliation info available

MeSH

Alveolar ProcessAnalysis of VarianceAnimalsDisease Models, AnimalExostosesImage Processing, Computer-AssistedMandibleMandibular DiseasesRadiography, Dental, DigitalStatistics as TopicStatistics, NonparametricSubtraction TechniqueSwine

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

12076050

Citation

Fidler, A, et al. "Impact of JPEG Lossy Image Compression On Quantitative Digital Subtraction Radiography." Dento Maxillo Facial Radiology, vol. 31, no. 2, 2002, pp. 106-12.
Fidler A, Likar B, Pernus F, et al. Impact of JPEG lossy image compression on quantitative digital subtraction radiography. Dentomaxillofac Radiol. 2002;31(2):106-12.
Fidler, A., Likar, B., Pernus, F., & Skaleric, U. (2002). Impact of JPEG lossy image compression on quantitative digital subtraction radiography. Dento Maxillo Facial Radiology, 31(2), 106-12.
Fidler A, et al. Impact of JPEG Lossy Image Compression On Quantitative Digital Subtraction Radiography. Dentomaxillofac Radiol. 2002;31(2):106-12. PubMed PMID: 12076050.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impact of JPEG lossy image compression on quantitative digital subtraction radiography. AU - Fidler,A, AU - Likar,B, AU - Pernus,F, AU - Skaleric,U, PY - 2002/6/22/pubmed PY - 2002/7/20/medline PY - 2002/6/22/entrez SP - 106 EP - 12 JF - Dento maxillo facial radiology JO - Dentomaxillofac Radiol VL - 31 IS - 2 N2 - OBJECTIVES: The aim of the study was to evaluate the impact of JPEG lossy image compression on the estimation of alveolar bone gain by quantitative digital subtraction radiography (DSR). METHODS: Nine dry domestic pig mandible posterior segments were radiographed three times ('Baseline', 'No change', and 'Gain') with standardized projection geometry. Bone gain was simulated by adding artificial bone chips (1, 4, and 15 mg). Images were either compressed before or after registration. No change areas in compressed and subtracted 'No change-Baseline' images and bone gain volumes in compressed and subtracted 'Gain-Baseline' images were calculated and compared to the corresponding measurements performed on original subtracted images. RESULTS: Measurements of no change areas ('No change-Baseline') were only slightly affected by compressions down to JPEG 50 (J50) applied either before or after registration. Simulated gain of alveolar bone ('Gain-Baseline') was underestimated when compression before registration was performed. The underestimation was bigger when small bone chips of 1 mg were measured and when higher compression rates were used. Bone chips of 4 and 15 mg were only slightly underestimated when using J90, J70, and J50 compressions before registration. CONCLUSIONS: Lossy JPEG compression does not affect the measurements of no change areas by DSR. Images undergoing subtraction should be registered before compression and if so, J90 compression with a compression ratio of 1:7 can be used to detect and measure 4 mg and larger bone gain. SN - 0250-832X UR - https://www.unboundmedicine.com/medline/citation/12076050/Impact_of_JPEG_lossy_image_compression_on_quantitative_digital_subtraction_radiography_ DB - PRIME DP - Unbound Medicine ER -