Looking to buy an ultrasound? We got you covered! here are some tips that will make your ultrasound buying decision as easy as it can be!
When buying an ultrasound machine, it is very important to understand first what application is to be done on the machine. we have listed the different types of probes and their configurations that best suit your needs.
Linear Probe
First in our list is the Linear Probe. This transducer contains an array of crystals arranged in a linear pattern. A rectangular field of view is produced with this transducer arrangement. This probe emits high frequencies in the order of 4.5 to 18 MHz, which provides better resolution but less penetration. Due to this configuration, the probe can create high definition images of structures close to the body surface. Linear probes are commonly used in applications like vascular, musculoskeletal, testicular, breast and thyroid examinations.
Convex Probe
The next kind of transducer is the Convex probe. This probe is also called a curvilinear transducer because the crystals are l arranged in a curved, convex array. This results to a sector or pie-shaped image that allows for a wider field of view especially on deeper tissues at the cost of reduced lateral resolution. The range of frequencies used by this type of probe is usually between 2 to 6MHz.
This is the probe commonly used when looking at organs like liver, gallbladder, spleen, pancreas, and kidneys. It can also be used when visualizing the developing fetus of a pregnant woman.
Phased Array Probe
The third kind of transducer is the Phased array probe. This probe, thanks to its small footprint, enables the imaging of organs behind structures that are not ultrasound friendly. This is the reason why doctors choose this probe to view organs in the chest like the heart because its ultrasound waves are able to sneak through the ribs. This transducer is commonly used for heart examinations like 2D Echocardiography. The probe frequency varies in the range of 2 to 6 MHz.
Endocavity Probe
The next kind of probe is mostly used to perform internal examination of the patient like transvaginal and transrectal scans. This type of probe is called the Endocavity probe. This transducer has a much longer probe handle and has a “U” shaped lens and array. Its small footprint allows this transducer to be used for scanning the inside of the body. Because of its shape and appearance, endocavity probes do not have a great range of depth, but they give out a much wider field of view than of a convex probe. Your doctor might order this kind of ultrasound to diagnose a certain condition or to check out your baby while still in the womb. This is used in females to check the, cervix, uterus, fallopian tubes and the bladder. In male patients, it is used to check the bladder, prostate and seminal vesicles. The probe frequency varies in the range of 5 to 11 MHz.
3D/4D Probe
3D ultrasound refers to the volume representation of ultrasound information and is also referred to as 4D when it includes a sequence of 3D volumes gathered over time. This probe is usually utilized in fetal, cardiac and vascular applications. 3D Ultrasound can be used when doctors want to have a complete understanding of the three-dimensional anatomic relationship which could not be done when using 2D probes.
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