The online version of this article (https://doi.org/10.1007/s11282-018-0350-z) contains supplementary material, which is available to authorized users.
To assess the linear measurements of edentulous ridges recorded from multidetector row computed tomography (MDCT) images obtained by a previously untested ultra-low dose in combination with filtered back-projection (FBP), adaptive statistical iterative reconstruction (ASIR), and model-based iterative reconstruction (MBIR).
Three cadavers were imaged using a reference protocol with a standard dose and FBP (volume CT dose index (CTDIvol): 29.4 mGy) and two ultra-low-dose protocols, LD1 and LD2 (CTDIvol: 0.53 and 0.29 mGy). All test examinations were reconstructed with FBP, ASIR 50, ASIR 100, and MBIR. Linear measurements from the images of the edentulous ridges recorded from the test protocols were compared with those from the reference using a one-sample t test, Bland–Altman plots, and linear regression. Statistical significance was set at a p value of 0.05.
The one-sample t test demonstrated a statistically significant difference between the measurements from the reference protocol and all test protocols. The difference was not clinically significant for the following three test protocols: LD1/FBP, LD1/ASIR 50, and LD2/FBP. Bland–Altman plots with linear regression showed no systematic variation between the measurements obtained with the reference protocol and these three test protocols.
The lowest-dose protocol to demonstrate comparable measurements with a standard MDCT dose was CTDIvol 0.29 mGy with FBP. These results must be considered with caution for areas of the jaws with thin cortication. The results in areas of thin cortication should be verified by studies with larger sample sizes at such areas and comparison with true gold standard measurements.
United Nations Scientific Committee on the Effects of Atomic Radiation. Sources and effects of ionizing radiation. Official Records of the General Assembly, Sixty-third Session, Supplement No. 46; New York: United Nations; 2010.
National Council on Radiation Protection and Measurements. Achievements of the past 50 years and addressing the needs of the future. In: NCRP fiftieth annual meeting program; 2014.
McHanwell S, Brenner E, Chirculescu ARM, Drukker J, van Mameren H, Mazzotti G, et al. The legal and ethical framework governing body donation in Europe—a review of current practice and recommendations for good practice. Eur J Anat. 2008;12(1):1–24.
Riederer BM, Bolt S, Brenner E, Bueno-Lopez JL, Cirulescu ARM, Davies DC, et al. The legal and ethical framework governing body donation in Europe—1st update on current practice. Eur J Anat. 2012;16(1):1–21.
Platzer W, Putz R, Poisel S. Ein neues Konservierungs- und Aufbewahrungssystem für anatomisches Material. Acta Anat (Basel). 1978;102(1):60–7. CrossRef
Christner JA, Kofler JM, McCollough CH. Estimating effective dose for CT using dose–length product compared with using organ doses: consequences of adopting International Commission on Radiological Protection Publication 103 or dual-energy scanning. AJR Am J Roentgenol. 2010;194(4):881–9. CrossRefPubMed
Bland JM, Altman D. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1986;327(8476):307–10. CrossRef
European Union. Council Directive 2013/59/Euratom of 5 December 2013. Laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation, and repealing Directives 89/618/Euratom, 90/641/Euratom, 96/29/Euratom, 97/43/Euratom and 2003/122/Euratom. Off J Eur Union. 2014;17:13/1–13/73.
Kobayashi K, Shimoda S, Nakagawa Y, Yamamoto A. Accuracy in measurement of distance using limited cone-beam computerized tomography. Int J Oral Maxillofac Implants. 2004;19(2):228–31. PubMed
- Comparability of dental implant site ridge measurements using ultra-low-dose multidetector row computed tomography combined with filtered back-projection, adaptive statistical iterative reconstruction, and model-based iterative reconstruction
Asma’a Abdurrahman Al-Ekrish
- Springer Singapore
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