Technical Note: Long‐term stability of Hounsfield unit calibration for cone beam computed tomography

Background and objective: In recent years, cone-beam computed tomography (CBCT) has become a key diagnostic tool in dentistry. CBCT can provide 3D images of the maxillofacial area to help dental practitioners in diagnosis and treatment, especially implant placement and treatment of pathogenic lesions. This study aimed to compare the Hounsfield Unit (HU) values obtained from CBCT images for bones of different densities with the corresponding HU values from MDCT images. Materials and methods: cube-shaped bone blocks of identical size were cut from the middle section of the cow ribs and femur area such that they had a layer of cortical bone in their buccal, lingual, and top surfaces and trabecular bone in the middle. MDCT scans were performed using a Somatom Sensation Ct Scanner. After determining HU from the results of these scans, nine suitable specimens from different ranges of HU were chosen for comparison. HU of the CBCT images was computed by the dedicated software of the CBCT machine. Finally, HU values obtained from MDCT and CBCT were compared. Data analysis was performed using SPSS version 25 at the 0.05 significance level. Results: The results showed a statistically significant difference between the mean HU from MDCT images and the mean HU from CBCT images (P<0.05). For similar specimens, CBCT produced higher mean HU values than MDCT. The Pearson correlation test detected a significant direct relationship between the HU values of specimens in MDCT and CBCT (P<0.05). Conclusion: For the tools and software used in this study, there was no significant difference between the HU values obtained from MDCT and CBCT, but the mean HU obtained from CBCT was higher than that from MDCT.

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Target Embolization of Complex Vertebral Artery Dissecting Aneurysm with Endovascular Reconstructive Technique Using Cone-beam Computed Tomography Angiography: Technical Note

World Neurosurgery ◽

10.1016/j.wneu.2021.11.123 ◽

2021 ◽

Author(s):

Kenji Fukuda ◽

Dai Kawano ◽

Yoshinobu Horio ◽

Hironori Fukumoto ◽

Masaki Takahara ◽

...

Keyword(s):

Computed Tomography ◽

Vertebral Artery ◽

Cone Beam Computed Tomography ◽

Computed Tomography Angiography ◽

Dissecting Aneurysm ◽

Technical Note ◽

Cone Beam ◽

Reconstructive Technique ◽

Vertebral Artery Dissecting Aneurysm

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Long-Term Postoperative Cone-Beam Computed Tomography Analysis of Secondary Bone Grafting in 79 Patients With Unrepaired Alveolar Clefts

Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.joms.2019.10.010 ◽

2020 ◽

Vol 78 (7) ◽

pp. 1164-1170

Author(s):

Tamir Dean Anver ◽

Lida Mirzai ◽

Peng Li ◽

Kathlyn K. Powell ◽

Peter D. Waite

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Bone Grafting ◽

Cone Beam ◽

Tomography Analysis

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Cone-beam computed tomography evaluation of short- and long-term airway change and stability after orthognathic surgery in patients with Class III skeletal deformities: bimaxillary surgery and mandibular setback surgery

International Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.ijom.2011.09.008 ◽

2012 ◽

Vol 41 (1) ◽

pp. 87-93 ◽

Cited By ~ 66

Author(s):

S.-B. Park ◽

Y.-I. Kim ◽

W.-S. Son ◽

D.-S. Hwang ◽

B.-H. Cho

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Orthognathic Surgery ◽

Cone Beam ◽

Class Iii ◽

Mandibular Setback ◽

Short And Long Term ◽

Mandibular Setback Surgery ◽

Bimaxillary Surgery

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Cone Beam Computed Tomography Evaluation of the Diagnosis, Treatment Planning, and Long-Term Followup of Large Periapical Lesions Treated by Endodontic Surgery: Two Case Reports

Case Reports in Dentistry ◽

10.1155/2013/564392 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12

Author(s):

Vijay Shekhar ◽

K. Shashikala

Keyword(s):

Computed Tomography ◽

Case Report ◽

Treatment Planning ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Histopathological Diagnosis ◽

Periapical Lesions ◽

Endodontic Surgery ◽

Anterior Teeth

The aim of this case report is to present two cases where cone beam computed tomography (CBCT) was used for the diagnosis, treatment planning, and followup of large periapical lesions in relation to maxillary anterior teeth treated by endodontic surgery. Periapical disease may be detected sooner using CBCT, and their true size, extent, nature, and position can be assessed. It allows clinician to select the most relevant views of the area of interest resulting in improved detection of periapical lesions. CBCT scan may provide a better, more accurate, and faster method to differentially diagnose a solid (granuloma) from a fluid-filled lesion or cavity (cyst). In the present case report, endodontic treatment was performed for both the cases followed by endodontic surgery. Biopsy was done to establish the confirmatory histopathological diagnosis of the periapical lesions. Long-term assessment of the periapical healing following surgery was done in all the three dimensions using CBCT and was found to be more accurate than IOPA radiography. It was concluded that CBCT was a useful modality in making the diagnosis and treatment plan and assessing the outcome of endodontic surgery for large periapical lesions.

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