Axial versus lateral resolution: Inherent errors in two-dimensional echocardiography imagingKeyword Highlighting Highlight selected keywords in the article textWilcken DE, Paoloni HJ, Dadd M, Carpenter D, Kossoff G.doi:10.1016/0002-9149(82)92486-9Larry E. Jacobs...
Observations on detecting left ventricular thrombus with two dimensional echocardiography: emphasis on avoidance of false positive diagnoses Axial and lateral resolution problems inherent with this technique can produce intracavitary echoes that may simulate thrombi. In addition, normal or pathologic ...
横模vs. 纵模 transverse或radial mode为横模 longitudinal或axial mode为纵模 横模与纵模 说起单模,更多应该是指单横模,或者说单空间模式,而且通常满足高斯分布。因此,单模激光器或单模光纤输出衍射极限光束。 单模也可能指单纵模。单横模不一定是单纵模,那单纵模一定是单横模和单频吗?
Though axial resolution is not a focus of this work, it is a subject of interest due to the temporal distortion caused by use of phononic crystals. A complete ultrasound image requires beamforming to account for diffraction and focusing in the elevation plane in addition to the pulse-echo dela...
is a narrow, vertically oriented midline space that communicates rostrally with thelateral ventriclesand caudally with thecerebral aqueduct(Figs. 6.4 and 6.8). The third ventricle has an elaborate profile on a sagittal view (Fig. 6.4A), but it is narrow in the coronal and axial planes (Fig....
The appropriate way to prevent poor resolution is to use the smallest FOV that encompasses the region of interest40. When it comes to the radiation issues, there have been controversies about performing CBCT routinely for orthodontic patients, especially in young patients. As part of the routine ...
High-resolution computed tomography scanning is suited for temporal bone imaging and is the modality of choice. MR imaging is useful to characterize disease, define the extent and spread of disease, or as a surveillance tool. MR imaging can be used with high-resolution computed tomography scanning...
For the diagonal panel tests, besides the machine load and displacement, 2 string pots placed along the two diagonals of the panel, were used. On the other hand, vertical transducers were used to obtain axial deformation of the cylinders tested in compression. The instrumentation of the large-...
The sources correspond to an area of loss of resolution of the Vp/Vs model because S-waves are strongly attenuated during their travel within the magma-filled volume. Full size image All the sources are located beneath the summit area in the 3–9 km depth interval, with a clear spatial...
These suggest that most augmentation could stem from the change in the effective angle of attack, although the stretched LEV system near the outboard of the wing sections indicates the presence of ‘the changing axial-velocity in LEV’. Contralateral wing mitigates the excessive force The analysis ...