harmonic imaging;

contrast harmonic imaging;

harmonic power Doppler;

subharmonic imaging;

superharmonic imaging;

pulse inversion imaging;

release burst imaging.

The transducer is a handheld device that emits and receives sound waves. It converts electrical energy into sound waves and captures the returning echoes to create images.

The control panel houses the interface where the sonographer adjusts imaging parameters such as depth, frequency, and gain. It allows for customization of imaging settings based on the clinical requirements. The transducer pulse controls change the amplitude, frequency and duration of the pulses emitted from the transducer probe.

The central processing unit (CPU) serves as the brain of the ultrasound machine, processing the acquired data and transforming it into images. It handles complex calculations, image optimization, data storage and contains the electrical power supplies for itself and the transducer probe.

The display monitor (oscilloscope, tablet, computer monitor, etc.) showcases the real-time ultrasound images produced by the machine. It provides visual feedback to the sonographer, aiding in the interpretation and analysis of anatomical structures. Handheld ultrasound devices and mobile ultrasound probes can be connected wirelessly to a smartphone or tablet via Bluetooth or WiFi. These end device serves then as the ultrasound monitor.

Data input and measurements are done with the keyboard cursor (trackball). Ultrasound devices used for handheld point of care ultrasound (HPOCUS) are operated via the touch screen of the control panel.

Images are captured, reviewed, stored and transmitted digitally, using a standard format for digital imaging and communications in medicine (DICOM). Disk storage devices (FDD, HDD, CD, DVD) are outdated, but may be used in older machines to store the acquired images if no picture archiving and communication system (PACS) connection is possible.

The displayed ultrasound pictures are usually digitally stored in a PACS. The images from portable ultrasound machines can be stored and conveniently managed on the end device itself, the inserted memory card or in the cloud. With a QR scanner, the images can be accessed via the Internet in the cloud. Often there is also the possibility to get a picture of a baby sonography as a printout.

Stationary units are typically larger in size and are installed in dedicated imaging rooms. These machines offer advanced imaging capabilities and a wide range of specialized features. They are commonly found in hospitals, clinics, and university medical centers where comprehensive imaging services are provided.

Portable units (see Portable Ultrasound Machine), as the name suggests, are compact and lightweight, designed for on-the-go imaging. These machines are highly versatile and offer excellent mobility, allowing healthcare professionals to bring the ultrasound system directly to the patient's bedside. Portable ultrasound machines are particularly useful in emergency settings, rural healthcare facilities, and point-of-care applications.