Comparison of film, direct digital, and tuned-aperture computed tomography images to identify the location of crestal defects around endosseous titanium implants

Webber, Richard L.; Horton, Roger A.; Underhill, Thomas E.; Ludlow, John B.; Tyndall, Donald A.

doi:10.1016/s1079-2104(96)80029-1

Cited by 72 publications

(38 citation statements)

References 7 publications

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“…The TACT technique does not require expensive equipment and can be easily employed in routine clinical and laboratory settings without having to standardize or maintain rigid projection geometry. Studies using conventional film-based 2D radiographs as the basis images for 3D reconstruction using TACT have produced impressive results, too [1,19,20,21,22,23,24,25,26,27,28].…”

Section: Discussionmentioning

confidence: 99%

“…This served as the third imaging modality for purposes of this investigation and was known as iteratively restored TACT images (TACT-IR). Iterative restoration has been shown to improve the diagnostic accuracy of TACT images with respect to numerous other diagnostic tasks [19,22,24,26,27]. Fractal analyses was carried out on images acquired using three imaging modalities: (a) conventional 2D direct digital images; (b) TACT-U; and (c) TACT-IR.…”

Section: Image Acquisitionmentioning

confidence: 99%

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Fractal analyses of osseous healing using Tuned Aperture Computed Tomography images

et al. 2001

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The aim of this study was to evaluate osseous healing in mandibular defects using fractal analyses on conventional radiographs and tuned aperture computed tomography (TACT; OrthoTACT, Instrumentarium Imaging, Helsinki, Finland) images. Eighty test sites on the inferior margins of rabbit mandibles were subject to lesion induction and treated with one of the following: no treatment (controls); osteoblasts only; polymer matrix only; or osteoblast-polymer matrix (OPM) combination. Images were acquired using conventional radiography and TACT, including unprocessed TACT (TACT-U) and iteratively restored TACT (TACT-IR). Healing was followed up over time and images acquired at 3, 6, 9, and 12 weeks post-surgery. Fractal dimension (FD) was computed within regions of interest in the defects using the TACT workbench. Results were analyzed for effects produced by imaging modality, treatment modality, time after surgery and lesion location. Histomorphometric data were available to assess ground truth. Significant differences (p < 0.0001) were noted based on imaging modality with TACT-IR recording the highest mean fractal dimension (MFD), followed by TACT-U and conventional images, in that order. Sites treated with OPM recorded the highest MFDs among all treatment modalities (p < 0.0001). The highest MFD based on time was recorded at 3 weeks and differed significantly with 12 weeks (p < 0.035). Correlation of FD with results of histomorphometric data was high (r = 0.79; p < 0.001). The FD computed on TACT-IR showed the highest correlation with histomorphometric data, thus establishing the fact TACT is a more efficient and accurate imaging modality for quantification of osseous changes within healing bony defects.

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Section: Discussionmentioning

confidence: 99%

Section: Image Acquisitionmentioning

confidence: 99%

Fractal analyses of osseous healing using Tuned Aperture Computed Tomography images

et al. 2001

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“…Claimed advantage of TACT over conventional radiographic techniques is that the images produced have less anatomical noise in the area of interest (35,36). The overall radiation dose of TACT is not greater than 1 to 2 times that of a conventional periapical film as the total exposure dose is divided amongst the series of exposures taken (33,37).…”

Section: Computed Tomographymentioning

confidence: 99%

Imaging in Endodontics: An Overview of Conventional and Alternative Advanced Imaging Techniques

Gümrü

Tarçın²

2013

MUSBED

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Endodontide görüntüleme: Konvansiyonel ve alternatif ileri görüntüleme teknikleri Endodontide teşhis, tedavi planlaması ve tedavi sonuçlarının değerlendirilmesinde radyografik incelemeden büyük oranda istifade edilmektedir. İster röntgen filmi ile ister dijital sensörler ile çekilmiş olsun, endodontik problemlerin tedavisinde kullanılan periapikal radyografiler iki boyutlu olmaları, geometrik distorsiyon, anatomik yapıların süperpozisyonu ve sadece o andaki durumu yansıtmaları nedeniyle sınırlı bilgi sağlamaktadır. Bu derlemede periapikal radyografilerin sahip olduğu kısıtlamalar gözden geçirilmekte ve endodonti pratiğinde konvansiyonel radyografilerin tamamlayıcıları olarak önerilen alternatif ileri görüntüleme tekniklerine değinilmektedir. Bu görüntüleme tekniklerinin avantaj ve dezavantajları da kısaca tartışılmaktadır. Anahtar sözcükler: Bilgisayarlı tomografi, konik ışınlı bilgisayarlı tomografi, endodonti, manyetik rezonans görüntüleme, periapikal radyografi, ultrason ABS TRACTImaging in endodontics: an overview of conventional and alternative advanced imaging techniques Diagnosis, treatment planning and outcome assessment in endodontics depend to a large extent on radiographic examinations. Periapical radiographs, either captured on x-ray film or digital sensors, used for the management of endodontic problems provide limited information because of the combination of their twodimensional nature, geometric distortion, anatomical noise, and temporal perspective. This review provides a summary of the limitations of periapical radiographs and the relevance of alternative advanced imaging techniques which are suggested as adjuncts to conventional radiographs in endodontic practice. Advantages and disadvantages of these imaging techniques are also briefly discussed.

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“…Because newly developed, small, flat-panel detectors with high sensitivity to X-ray and comparatively low-noise characteristics have tomosynthesis system in which the benefit of digitization is fully utilized 29,30) . A 3-D imageforming algorithm, TACT, which can be implemented with virtually any projectionbased imaging system capable of digitized output, produces true 3D data from any number of arbitrarily oriented two-dimensional projections.…”

Section: Introductionmentioning

confidence: 99%

Clinical Validity of the Interactive and Low-Dose Three-Dimensional Dento-Alveolar Imaging System, Tuned-Aperture Computed Tomography

Yuki

Yamamoto

Kousuge

et al. 2003

Bull. Tokyo Dent. Coll.

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Based on technical studies and clinical examinations, the clinical value of a new three-dimensional dento-alveolar imaging system, Tuned-Aperture Computed Tomography (TACT ® ), were examined for dental applications. TACT is a conventional and low-cost tomosynthesis method in which the benefit of digitization is fully utilized. The clinical information yield of TACT has been examined for the detection of dental caries, periodontal defects and radicular fractures, and also for the pre-surgical assessment of implant placement and impacted teeth. In this article, we introduce basic TACT technology, review the literature pertaining to in vitro and in vivo studies, and describe the outline of our study of TACT to determine its clinical value in the assessment of impacted maxillary teeth.

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Comparison of film, direct digital, and tuned-aperture computed tomography images to identify the location of crestal defects around endosseous titanium implants

Cited by 72 publications

References 7 publications

Fractal analyses of osseous healing using Tuned Aperture Computed Tomography images

Fractal analyses of osseous healing using Tuned Aperture Computed Tomography images

Imaging in Endodontics: An Overview of Conventional and Alternative Advanced Imaging Techniques

Clinical Validity of the Interactive and Low-Dose Three-Dimensional Dento-Alveolar Imaging System, Tuned-Aperture Computed Tomography

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