Browse > Article

Consideration of density matching technique of the plate type direct radiologic image system and the conventional X-ray film;first step for the subtraction  

So, Sung-Soo (Department of Periodontology, College of Dentistry, Yonsei University Research Institute for Periodontal Regeneration)
Noh, Hyeun-Soo (Department of Periodontology, College of Dentistry, Yonsei University Research Institute for Periodontal Regeneration)
Kim, Chang-Sung (Department of Periodontology, College of Dentistry, Yonsei University Research Institute for Periodontal Regeneration)
Choi, Seong-Ho (Department of Periodontology, College of Dentistry, Yonsei University Research Institute for Periodontal Regeneration)
Kim, Kee-Deog (Department of Dental Radiology, College of Dentistry, Yonsei University Research Institute for Periodontal Regeneration)
Cho, Kyoo-Sung (Department of Periodontology, College of Dentistry, Yonsei University Research Institute for Periodontal Regeneration)
Publication Information
Journal of Periodontal and Implant Science / v.32, no.1, 2002 , pp. 199-211 More about this Journal
Abstract
Digital substraction technique and computer-assisted densitometirc analysis detect minor change in bone density and thus increase the diagnostic accuracy. This advantage as well as high sensitivity and objectivity which precludes human bias have drawn interest in radiologic research area. The objectives of this study are to verify if Radiographic density can be recognized in linear pattern when density profile of standard periapical radiograph with the aluminium stepwedge as the reference, was investigated under varies circumstances which can be encountered in clinical situations, and in addition to that to obtain mutual relationship between the existing standard radiographic system, and future digital image systems, by confirming the corelationship between the standard radiograph and Digora system which is a digital image system currently being used. In order to make quantitative analysis of the bone tissue, digital image system which uses high resolution automatic slide scanner as an input device, and Digora system were compared and analyzed using multifunctional program, Brain3dsp. The following conclusions were obtained. 1. Under common clinical situation that is 70kVp, 0.2 sec., and focal distance 10cm, Al-Equivalent image equation was found to be Y=11.21X+46.62 $r^2=0.9898$ in standard radiographic system, and Y=12.68X+74.59, $r^2=0.9528$ in Digora system, and linear relation was confirmed in both the systems. 2. In standard radiographic system, when all conditions were maintained the same except for the condition of developing solution, Al-Equivalent image equation was Y=10.07X+41.64, $r^2=0.9861$ which shows high corelationship. 3. When all conditions were maintained the same except for the Kilovoltage peak, linear relationship was still maintained under 60kVp, and Al-Equivalent image equation was Y=14.60X+68.86, $r^2=0.9886$ in the standard radiograhic system, and Y=13.90X+80.68, $r^2=0.9238$ in Digora system. 4. When all conditions were maintained the same except for the exposure time which was varied from 0.01 sec. to 0.8 sec., Al-Equivalent image equation was found to be linear in both the standard radiographic system and Digora system. The R-square was distributed from 0.9188 to 0.9900, and in general, standard radiographic system showed higher R-square than Digora system. 5. When all conditions were maintained the same except for the focal distance which was varied from 5cm to 30cm, Al-Equivalent image equation was found to be linear in both the standard radiographic system and Digora system. The R-square was distributed from 0.9463 to 0.9925, and the standard radiographic system had the tendency to show higher R-square in shorter focal distances.
Keywords
Conventional X-ray; Digora; Density profile; Digital substraction;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Goaz PW, White SC. Oral Radiology. Principales and Interpretation, 3rd ed., St. Louis, Missouri. Mosby-Year Book Inc, 1994
2 Grondahl HG, Borg E. Endodontic mesurements with an intraoral image plate technique-the Digora System. The proceeding of the 10th international congress of dento-maxillofacial radiol 1994;101-151
3 Veders XL. The effect of different exposure times on the detectability of endodontic files in the new Diora direct digital introral X-ray system, The proceeding of the 10th international congress of Dentomaxillofacial Radiol 1994;245-246
4 Nummikoski PV, Martinez TS, Matteson SR, Mcdavid WD, Dove SB. Digiral subtraction radiography in artificial recurrent caries detection. Dentomaxillofac radiol 1992;21:59-64   DOI
5 Braegger U, Pasquali L, Weber H, Kornman KS. Computer-assisted densitometric image analysis (CADIA) for the assessment of alveolar bone density changes in furcations. J Clin Peridontol 1989;16:46-52   DOI
6 Strid KG, Klebo P. Bone mass determination from microradiographs by computer-assisted videodensitometry. I. Methodology. Acta Radiologica 1998;29:465-472   DOI   ScienceOn
7 Webber RL, Ruttimann UE, Grondahl HG. X-ray image subtraction as a bias for assessment of periodontal changes. J Periodont Res 1982;17:509-511   DOI   PUBMED
8 Ramadan AE, Mitchell DF. A roentgenogrphic study of experimental bone destruction. Oral Surg 1962;15:934-943   DOI   ScienceOn
9 van der Stelt PF. Computer-assisted interpretation in radiographic diagnosis. Dental Clinics of North America 1993;37:683-696   PUBMED
10 Okano T, Mera T, Ohki M, Ishikawa I, Yamada N. Digital subtraction of radiograph in evaluating alveolar bone changes after initial periodontal therapy. Oral Surg Oral Med Oral Pathol 1990;69:258-262   DOI   ScienceOn
11 Bragger U. Digital imaging in periodontal radiography. A review. I Clin Periodontol 1988;15,551-557   DOI
12 Miles DA. Imaging using solid-state detectors, Advaned in dental imagimg. Dental Clinics of North America 1993;37:531-540   PUBMED
13 Bender IB, Seltzer S. Roentgenographic and direct observation of experimental lesions in bone. I JAVA 1961;62:708-716
14 Sandernk GCH, van der stelt PF, Velders XL.Image quality of a new indirect digital intraoral X-ray sensor system. The digora system compared to direct digital systems and film in assessing root canal length. The proceeding of the 10th international congress of dento-maxillaofacial radiol 1994;377-379
15 Grondahl K, Grondahl HG, Webber R.L. Influence of variations in projection geometry on the detectability of periodontal bone loss; A comparison between subtraction radiography and conventional radiographic technique. I Clin Periodontol 1984;11:411-420   DOI
16 Welander U, et al. Resolution as defined by line spread and modulation transfer function for four digital intraoral radiographic system, Oral surg Oral med Oral pathol 1994;78:109-115   DOI   ScienceOn
17 Borg E, Grondahl HG. Dynamic range of film and digital systems for image acquisition in intrra-oralradiography. Third Symposium on Digital in Dental Radiography. Dentomaxillofacial Radiol 1995;224:104-105
18 Webber RL, Ruttimann UE, Heaven TJ. Calibration errors in digital subtraction radiography. J Periodontal Res 1990;25:268-275   DOI   PUBMED
19 Fujita M, Kodera Y, Ogawa M, Wada T, Doi K. Digital image processing of periopical radiographs. Oral Surg Oral Med Oral Pathol 1988;65:490-494   DOI   ScienceOn
20 Ruttimann UE, Webber RL. Volumetry of localized bone lesions by subtraction radiography J Periodontal Res 1987;22:215-216
21 Grondahl HG, Grondahl K, Webber RL. A digital subtraction technique for dental radiography. Oral Surg 1983;55:96-102   DOI   ScienceOn
22 Hassfeld S, Klug D, Merkle K, Ziegler C. First experience with the new siemens digital intraoral radiographic system. Third symposium on digital imaging in dental radiography. Dentomaxillofac Radiol 1995;24:93-98
23 Engelke W, Ruttimann UE, Tsuchimochi M, Bacher JD. An experimental study of new diagnostic methods for the examination of osseous lesions in the temporomandibular joint. Oral Surg Oral Med Oral Pathol 1992;73:348-349   DOI   ScienceOn
24 Kashima I, et al. Intraoral computed radiography using the Fuji computed radiography imagimg plate, Oral Surg Oral Med Oral Pathol 1994;78:239-246
25 Ortman LF, Dunford R, Mchenry K, Hausmann E. Subtraction radiography and computer assisted densitometric analyses of standardized radiographs. A comparison study with I absorptiomeetry. J Periodont Res 1985;20:644-651   DOI
26 Sun H, Ohki M, Yamada N. Quantitative evaluation of bone repair of peroapical lesions using digital subtraction radiography. part 2. Clinical application. Oral Radiol 1991;7:35-46   DOI
27 Ludlow JB, Soltmann R, Tyndal D, Gray JJ. Digital subtracted linear tomograms: Three techniques for mesuring condylar displacement. in digitally subtracted linear tomography. Dentomaxillofac radiol 1992;21:81-89
28 Vos MH, Janssen PTM, van Aken J, Heethaar RM. Quantitative mesurement of periodontal bone changes by digital subtraction as a bias for assessment of periodontal changes J Periodont Res 1986;21:583-591
29 Harada T, Nishikawa K, Shibuya H, Hayakawa Y, Kuroyanagi K. Sen-A-Ray characteristics with variation in beam quality, Oral Surg Oral Med Oral Pathol Oral Radiol. Endo 1995;80:120-123   DOI   ScienceOn
30 Wenzel A, Warrer K, Karring T. Digital substraction radiography in assessing bone changes in periodontal defects following guided tissue regeneration. I Clin Periodontal 1992;19:208-213   DOI
31 Walker A, Honeer K, Czajka J, Shearer AC, Wilson NHF. Quantitative assesmesnt of a new dental imaging system. British J Radiography 1991;64:529-36
32 Nelvig P, Wing K, and Welander U. Sen-A-Ray. A new system for direct digital intraoral radiography. Oral Surg Oral Med Oral Pathol 1992;74:818-823   DOI   ScienceOn
33 Kashima I, et ai. Computed panoramic tomography with scanning laser-stimulated luminescence. Oral Surg Oral Med Oral Pathol 1985;60:448-453   DOI   ScienceOn