From Verathon Inc.;
'The BladderScan® BVI 6300 Bladder Monitor is a handheld, noninvasive ultrasound instrument prescribed by the health care provider to enable patients to monitor bladder fullness on an ongoing basis. It is easy to use and quickly provides accurate results, so the patient can make informed decisions about when voiding is necessary.'

See also Urologic Ultrasound, Mirror Artifact, Pelvic Ultrasound, Transrectal Sonography and Ultrasonography.

From Verathon Inc.;
'The BladderScan® BVM 6500 enables physicians quickly and noninvasively to determine UEBW (ultrasound estimated bladder weight) and bladder volume using 3-dimensional V-mode® ultrasound. The BVM 6500 was designed to assist in diagnosis of bladder hypertrophy secondary to obstruction.'

See also Urologic Ultrasound, Mirror Artifact, Pelvic Ultrasound, Transrectal Sonography and Ultrasonography.

A bolus is a rapid infusion of high dose contrast agent. Dynamic and accumulation phase imaging can be performed after bolus injection. Since the transit time of the bolus is only a short time, images with high frame rate show the wash in and wash out of the contrast material. The injection rate and the total injected volume modifies the bolus peak profile. Substantial changes in the concentrations during signal acquisition induce artifacts. Furthermore, the hemodynamic parameters (cardiac output, blood pressure) influence the bolus profile. However, the characteristics of ultrasound contrast agents are favorable with a continuous perfusion.

See also Negative Bolus.

Compound B-mode imaging takes different forms and refers to different methods of creating the ultrasound image.
Real-time compound ultrasound improves the image quality of B-mode scanning by combining ultrasound information obtained from multiple angles. The used averaging process of compound B-mode reduces artifacts and improves the representation of true image data.
B-mode images and Doppler mode images (see also Duplex) can be compounded on the display to improve the visualization of the anatomical relationships between vessels and the surrounding tissues.

(CWD) Continuous wave (CW) Doppler is an ultrasound imaging mode, which records blood flow velocities along the length of the beam. Continuous wave Doppler uses different crystals to send and receive the signal. The transducer operating in continuous wave mode utilizes one half of the elements and is continuously sending sound waves of a single frequency while the other half is continuously receiving the reflected signals.
The advantages of a continuous wave transducer are a high sensitivity and no Nyquist limit. CW Doppler does not alias but has no depth precision and large gate. The beat frequency is the Doppler shift. CW Doppler echocardiography employs this technique to record the flow of blood through the cardiovascular system.

See also Cross Talk, Periorbital Doppler, and Mirror Artifact.