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Flexible lateral isocenter: A novel mechanical functionality contributing to dose reduction in neurointerventional procedures.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Radiology.
2Toshiba Medical Systems Europe, Zoetermeer, the Netherland.
2017 (English)In: Interventional Neuroradiology, ISSN 1591-0199, E-ISSN 2385-2011, Vol. 23, no 6, p. 669-675Article in journal (Refereed) Published
Abstract [en]

Aim of the study A new functionality that enables vertical mobility of the lateral arm of a biplane angiographic machine is referred to as the flexible lateral isocenter. The aim of this study was to analyze the impact of the flexible lateral isocenter on the air-kerma rate under experimental conditions. Material and methods An anthropomorphic head-and-chest phantom with anteroposterior (AP) diameter of the chest varying from 22 cm to 30 cm simulated human bodies of different body constitutions. The angulation of the AP arm in the sagittal plane varied from 35 degrees to 55 degrees for each AP diameter. The air-kerma rate (mGy/min) values were read from the system dose display in two settings for each angle: flexible lateral isocenter and fixed lateral isocenter. Results The air-kerma rate was significantly lower for all AP diameters of the chest of the phantom when the flexible lateral isocenter was used: (a) For 22 cm, the p value was 0.028; (b) For 25 cm, the p value was 0.0169; (c) For 28 cm, the p value was 0.01005 and (d) For 30 cm, the p value was 0.01703. Conclusion Our results show that the flexible lateral isocenter contributes significantly to the reduction of the air-kerma rate, and thus to a safer environment in terms of dose lowering both for patients and staff.

Place, publisher, year, edition, pages
2017. Vol. 23, no 6, p. 669-675
Keywords [en]
Lateral isocenter, biplane angiographic machine, dose saving
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:uu:diva-333785DOI: 10.1177/1591019917728260PubMedID: 28944706OAI: oai:DiVA.org:uu-333785DiVA, id: diva2:1157785
Available from: 2017-11-16 Created: 2017-11-16 Last updated: 2018-04-26Bibliographically approved

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