CONE-BEAM COMPUTED TOMOGRAPHY IN PALEOANTHROPOLOGY

Objective: to study the capabilities of cone-bean computed tomography (CBCT) in estimating the bone structure when analyzing anthropological findings.

Material and methods. Twenty-four bone fragments (remains) of Napoléon Bonaparte Imperial Army soldiers who had died at a Königsberg military hospital during their retreat from Russia in the War of 1812 were examined by CBCT. A total of 28 tubular bones with different injury healing signs and a skull with maxillofacial trauma marks were investigated. Furthermore, an object from D.G. Rokhlin’s paleopathological collection was used to analyze a complicated humeral infectious process. CBCT was performed by individually selecting the scanning foldings, physicotechnical conditions and regimens in relation to the anatomic location and size of fragments.

Results. Processing of the obtained images reveled fractures of different bones in 19 (65.5%) cases. The signs of ununited fractures were visualized in 20.7% of the samples. Image post-processing showed intraarticular consolidated fractures in 13.8% of the anthropological findings. The CBCT examination of bone fragments exhibited the signs of their fusion. A wound pattern was established in 31% of the samples. The specific features of a bone amputation stump could be characterized in detail in 17.2% of the anthropological findings. 51.7% of the cases were found to have signs of sustained bone inflammatory diseases of various genesis, which in 41.4% of them were presented by linear, bulbar, and assimilated periostal reactions and significantly detectable on CBCT scans. Sequestral cavities were imaged in 31% of the fragments.

Conclusion. The CBCT images are characterized by high informative value (from 7.5 to 10.6 pixels/mm), optimal spatial resolution, definition, and hardness. The software of CBCT involves the parameters and possible postprocessing of images (building of panoramic and mulplanar reconstructions, assessment of the density characteristics of tissues), which allow an analysis of anthropological material, by needlessly destroying them.

1. Бужилова А.П., Березина Н.Я., Селезнева В.И. Новые находки из коллекции Рохлина: рентгенологический анализ образцов из палеопатологического фонда МАЭ РАН. Электронная библиотека Музея антропологии и этнографии им. Петра Великого (Кунсткамера) РАН. http://www. kunstkamera.ru/lib/rubrikator/ 08/08_02/978-5-88431-238-8/ Buzhilova A.P., Berezina N.Ya., Selezneva V.I. New findings from the collection of Rokhlin: roentgenological analysis of samples from the Paleopatological Fund of MAE RAS. Eleсtronic Library of the Museum of Anthropology and Ethnography named after Peter the Great (Cabinet of curiosities), Russian akademy of sciences. http://www. kunstkamera.ru/lib/rubrikator/ 08/08_02/978-5-88431-238-8/ (in Russian).

2. Бужилова А.П., Потрахов Н.Н., Потрахов Е.Н., Грязнов А.Ю. Анализ маркеров эпизодического стресса методом микрофокусной рентгенографии (по антропологическим материалам эпохи каменного века). Биотехносфера. 2013; 2/26: 7–14. Buzhilova A.P., Potrakhov N.N., Potrakhov E.N., Gryaznov A.Yu. An analysis of markers of episodic stress with microfocus Х-ray method (on the anthropological materials of the stone age). Biotekhnosfera. 2013; 2/26: 7–14 (in Russian).

3. Васильев А.Ю., Блинов Н.Н. (мл.), Егорова Е.А., Макарова Д.В., Горлычева Е.Г. Возможности применения современных методов лучевой диагностики в антропологии. В кн. Матер. научн.- практ. конфер. «Поволжские чтения». Саратов; 2013: 12–3. Vasil’ev A.Yu., Blinov N.N. (jr), Egorova Е.А., Makarova D.V., Gorlycheva Е.G. Application opportunities of modern X-ray diagnostics in anthropology. In: Mat. sci.- pract. konf. «Volga reading». Saratov; 2013: 12–3 (in Russian).

4. Макарова Д.В. Новые возможности методов лучевой диагностики в антропологии. В кн.: Мат. Междунар. VI конф. «Невский радиологический форум-2013». СПб; 2013: 318. Makarova D.V. New opportunities of radiodiagnostics in anthropology. In: Mat. Int. VI konf.: «Neva Radiology Forum-2013». St. Petersburg. 2013: 318 (in Russian).

5. Медникова М.Б. Кисть сунгирца (новые данные о строении трубчатых костей). Вестник Моск. универ. С. XXIII. Антроп. 2012; 4: 4. URL: http://www.antropos.msu.ru/ vestnic/12_4.html Mednikova M.B. The sungirc`s brush (new data about structure of tubular bones). Vestnik Moskovskogo universiteta. Seriya XXIII. Antropologiya. 2012; 4: 4. URL: http:// www.antropos.msu.ru/vestnic/ 12_4.html (in Russian).

6. Васильев А.Ю., Буланова И.М., Бужилова А.П., Медникова М.Б., Березина Н.Я. Микрофокусная рентгенография и спиральная рентгеновская компьютерная томография в распознавании изменений костной ткани у древних людей. Казанский медицинский журнал. 2010; 1: 44–8. Vasil’ev A.Yu., Bulanova I.M., Buzhilova A.P., Mednikova M.B., Berezina N.Ya. Microfocus radiography and spiral X-ray computed tomography in recognition of changes of bone tissue of ancient people. Kazanskiy meditsinskiy zhurnal. 2010; 1: 44–8 (in Russian).

7. Макарова Д.В., Егорова Е.А., Горлычева Е.Г., Блинов Н.Н., Васильев А.Ю., Бужилова А.П. Возможности современных методов лучевой диагностики в экспертной оценке антропологического материала. Совр. технол. в мед. 2014; 6 (1): 34–42. Makarova D.V., Egorova Е.А., Gorlycheva Е.G., Blinov N.N., Vasil'ev A.Yu., Buzhilova A.P. Opportunities of modern methods of X-ray diagnostics in the expert evaluation of anthropological material. Sovremennye tekhnologii v meditsine. 2014; 6 (1): 34–42 (in Russian).

8. De Froidmont S., Grabherr S., Vaucher P., De Cesare M., Egger C., Papageorgopoulou C. et al. Virtual anthropology: a comparison between the performance of conventional X-ray and MDCT in investigating the trabecular structure of long bones. URL: http:// www.ncbi.nlm.nih.gov/pubmed/ 23153800.

9. Coopersmith H. How X-rays demystified a 2,500-year-old battle wound. LiveScience's Exp. Voices: Op-Ed & Insights. URL: http://www.livescience.com/37929- deadly-barbed-arrowhead-revealedby-xray.html.