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Hace 2 días · Spectral Doppler interrogation of the portal vein (b) demonstrates intermittent bidirectional spikes (arrow in b) concerning for PVG. Subsequent Noncontrast CT of the abdomen and pelvis obtained in the sagittal ( c ) and coronal ( d ) planes was remarkable for significant colonic thickening with mesenteric stranding (arrows in c , d ) and minimal pneumatosis intestinalis (asterisk in d ...
Hace 5 días · Real-time three-dimensional color Doppler echocardiography overcomes the inaccuracies of spectral Doppler for stroke volume calculation. J Am Soc Echocardiogr. 2006; 19: 1403 ... Plug and parabolic flow showed errors due to limited resolution, i.e., partial volume effects, and their findings led to a general rule that required at ...
Hace 5 días · DVT scans were performed using a default lower limb venous pre-set with a 9 MHz linear probe and a mix of spectral trace (groin), compression, and augmentation views with colour doppler. The whole leg was scanned, including the common femoral vein, femoral vein, popliteal vein, the posterior tibial and peroneal veins of the calf, and any superficial vein thrombus within five centimetres of ...
Hace 2 días · Doppler ultrasound: The use of an ultrasound probe and speaker to applied over a vessel to detect flow beneath the probe Techniques The tip of the ultrasound probe is lubricated with ultrasonic gel and applied to the skin over vessels in the extremity to detect flow in arteries of interest, such as the dorsalis pedis ( Figure 53-1 ) and posterior tibial ( Figure 53-2 ) arteries.
Hace 5 días · It is important to note that some ultrasonographic findings may be concerning in the first trimester such as megacystis (bladder length 7–15 mm), bowel containing omphaloceles, intra-abdominal cysts or fluid collections, and some cardiac anomalies in euploid fetuses that may potentially resolve without adverse outcomes. 53,59,91–93 As would be expected from embryologic development, some ...
Hace 5 días · LAB 2 Peculiarities of light: doppler shift, spectral lines, and limits of resolution 2.1 Looking at Things Far Away On the surface, astronomy might seem like a relatively straightforward science. You simply point your telescope at an object and take the measurements you need. However, as is often the case with all areas of study, the reality is often far more complex than it seems.
Hace 2 días · Table 1 provides an overview of previous wind-tunnel studies on cross-ventilation in buildings. However, the majority of these studies were conducted under isothermal conditions. For example, Karava et al. [4] performed wind-tunnel experiments for a cross-ventilated single-zone building using particle image velocimetry (PIV) to measure outdoor and indoor velocities, and pressure taps to ...
