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The conditions under which mechanical properties of dentine are tested influence the values recorded. The aims of this study were to examine the effect of hydration on the mechanical properties of primary carious dentine and to provide information on changes in hardness and modulus of elasticity change caused by the demineralizing caries process in dentine.(More)
The use of ultrasound imaging for image guidance of cardiac procedures is limited by the small field of view of the ultrasound volume. A larger view can be created by image-based registration of partially overlapping volumes, but automatic registration often fails unless the volume alignment is initialised close to the volumes' correct alignment. In this(More)
Minimally invasive cardiac surgery is made possible by image guidance technology. X-ray fluoroscopy provides high contrast images of catheters and devices, whereas 3D ultrasound is better for visualising cardiac anatomy. We present a system in which the two modalities are combined, with a trans-esophageal echo volume registered to and overlaid on an X-ray(More)
BACKGROUND Rotational angiography with three-dimensional reconstruction (3DRA) is a new imaging tool recently introduced to guide mapping and ablation of the left atrium. OBJECTIVE The purpose of this study was to determine the utility of 3DRA for imaging the ventricles and guiding ventricular tachycardia (VT) ablation. METHODS Using the Philips Allura(More)
Heart teams performing structural heart interventions face particular imaging difficulties, including separate image orientation and different tissue imaging abilities of the involved techniques. Specialized software (EchoNavigator, Philips Healthcare, Best, The Netherlands) enables fusion of three-dimensional transoesophageal echocardiography and(More)
The use of ultrasound imaging for guidance of cardiac interventional procedures is limited by the small field of view of the ultrasound volume. A larger view can be created by image-based registration of several partially overlapping volumes, but automatic registration is likely to fail unless the registration is initialized close to the volumes' correct(More)
REAL-TIME, 3-DIMENSIONAL TRANSESOPHAGEAL ECHOCARDIOGRAPHY (RT 3D TEE) IS NOW USED ROUTINELY IN CONJUNCTION with x-ray fluoroscopy to guide percutaneous structural heart disease (SHD) interventions. Unlike fluoroscopy, RT 3D TEE provides excellent detail of 3D anatomy and soft tissue structures, and provides “live” intraprocedure guidance. A novel 3D(More)
(A) The integrated marking feature allows for the placement of a colored are placed on or near the center of each of the coronary cusps in the en colored markers are individually dragged (table side control, using a stand level of the aortic annulus (left panel). These 2 separate steps result in the (long-axis location) of each coronary cusp of the native(More)