Radiological findings in ancient Egyptian canopic jars: comparing three standard clinical imaging modalities (x-rays, CT and MRI)
Tóm tắt
The aim of our study was to evaluate the potential and the limitations of standard clinical imaging modalities for the examination of ancient Egyptian canopic jars and the mummified visceral organs (putatively) contained within them. A series of four ancient Egyptian canopic jars was imaged comparing the three standard clinical imaging modalities: x-rays, computed tomography (CT) and magnetic resonance imaging (MRI). Additionally, imaging-data-based volumetric calculations were performed for quantitative assessment of the jar contents. The image contrast of the x-ray images was limited by the thickness and high density of the calcite mineral constituting the examined jars. CT scans showed few artefacts and revealed hyperdense structures of organ-specific morphology, surrounded by a hypodense homogeneous material. The image quality of MRI scans was limited by the low amount of water present in the desiccated jar contents. Nevertheless, areas of pronounced signal intensity coincided well with hyperdense structures previously identified on CT scans. CT-based volumetric calculations revealed holding capacities of the jars of 626–1319 cm3 and content volumes of 206–1035 cm3. CT is the modality of choice for non-invasive examination of ancient Egyptian canopic jars. However, despite its limitations, x-ray imaging will often remain the only practicable method for on-site investigations. Overall, the presented radiological findings are more compatible with contained small organ fragments rather than entire mummified organs, as originally expected, with consequent implications for envisioned future sampling for chemical and genetic analysis.
Tài liệu tham khảo
Koenig W, Barth JA (1896) 14 Photographien mit Roentgen-Strahlen: aufgenommen im physikalischen Verein zu Frankfurt a.M. Verlag von Johann Ambrosius Barth, Leipzig
Lewin PK, Harwood-Nash DC (1977) Computerized axial tomography in medical archeology. Paleopathol Newsl:17–8–9
Cox SL (2015) A critical look at mummy CT scanning. Anat Rec (Hoboken) 298:1099–1110
Saab G, Chhem RK, Bohay R (2008) Paleoradiologic Techniques. Paleoradiology imaging mummies and fossils. Brothwell DR and Chhem RK. Berlin Heidelberg, Springer Verlag: 15–54
Ruhli FJ, Chhem RK, Boni T (2004) Diagnostic paleoradiology of mummified tissue: interpretation and pitfalls. Can Assoc Radiol J 55:218–227
Cavka M, Janković I, Sikanjić PR et al (2010) Insights into a mummy: a paleoradiological analysis. Coll Antropol 34:797–802
Ruder TD, Thali Y, Bolliger SA et al (2013) Material differentiation in forensic radiology with single-source dual-energy computed tomography. Forensic Sci Med Pathol 9:163–169
Allam AH, Thompson RC, Wann LS et al (2011) Atherosclerosis in ancient Egyptian mummies: the Horus study. JACC Cardiovasc Imaging 4:315–327
Ruhli FJ (2015) Short review: magnetic resonance imaging of ancient mummies. Anat Rec (Hoboken) 298:1111–1115
Rühli FJ, von Waldburg H, Nielles-Vallespin S et al (2007) Clinical magnetic resonance imaging of ancient dry human mummies without rehydration. JAMA 298:2618–2620
Ohrström L, Bitzer A, Walther M, Rühli FJ (2010) Technical note: terahertz imaging of ancient mummies and bone. Am J Phys Anthropol 142:497–500
Ruhli FJ, Hodler J, Boni T (2002) Technical note: CT-guided biopsy: a new diagnostic method for paleopathological research. Am J Phys Anthropol 117:272–275
Cavka M1, Petaros A, Boščić D et al (2012) Scenes from the past: CT-guided endoscopic recovery of a foreign object from the cranial cavity of an ancient Egyptian mummy. Radiographics 32:2151–2157
Dodson A (1994) The canopic equipment of the kings of Egypt. Studies in Egyptology. Kegan Paul International, London xxii, 215 p., 48 p. of plates : ill
Bolliger SA, Oesterhelweg L, Spendlove D, Ross S, Thali MJ (2009) Is differentiation of frequently encountered foreign bodies in corpses possible by Hounsfield density measurement? J Forensic Sci 54:1119–1122
Wade AD, Nelson AJ, Garvin GJ (2011) A synthetic radiological study of brain treatment in ancient Egyptian mummies. Homo 62:248–269
David R (2003) Handbook to life in ancient Egypt. Rev. ed. Facts on File Library of World History. Facts on File, New York, p 417 S
Ikram S, Dodson A (1998) The mummy in ancient Egypt equipping the dead for eternity. Thames & Hudson, London, p 352
Dodson A, Ikram S (2008) The tomb in Ancient Egypt: royal and private sepulchres from the early dynastic period to the Romans. Thames & Hudson, London, p 368
Ruder TD, Thali Y, Schindera ST et al (2012) How reliable are Hounsfield-unit measurements in forensic radiology? Forensic Sci Int 220:219–223
Universität Zürich Anatomisches Institut (2011) Mumien: Mensch, Medizin, Magie aktuelle Forschungserkenntnisse für unsere Zukunft (Mummies: man, medicine, magic: current research for our future). Universität Zürich, Zürich, p 141
Ruhli FJ, Galassi FM, Haeusler M (2016) Palaeopathology: current challenges and medical impact. Clin Anat 29:816–822
Galassi FM, Habicht ME, Bouwman A, et al (2017) The Canopic Jar Project: interdisciplinary analysis of ancient mummified viscera. CIPEG J: Ancient Egyptian Sudanese Collections Museums. https://doi.org/10.11588/cipeg.2017.1.44165
Uranić I (2007) Aegyptiaca Zagrebiensia, in Catalogues and Monographs of the Archaeological Museum in Zagreb, A.M.i. Zagreb, editor. The Archaeological Museum in Zagreb, Zagreb
Weissleder R (2007) Primer of diagnostic imaging, 4th edn. Mosby Elsevier, Philadelphia, p 1112 S