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Probe Characteristics

Probe Characteristics

Fig 1.18. Image shows the 3 commonly used transducers in POCUS; a) phased array, b) linear array & c) curvilinear array. d) is a transesophageal echo probe.
Fig 1.19. Phased Array Probe

Characteristics: Small footprint, low frequency (1-5MHz), high frame rate. Ideal for scanning between the ribs. High frame rate allows scanning of moving structures.

Fig 1.20. Linear Probe

Characteristics: High frequency (5-13MHz), ultrasound waves emitted in straight line. Image displayed in rectangular field. Ideal for high resolution imaging at shallow depth. Lung pleura, blood vessels, nerves & US guided procedures.

Fig 1.21 Curvilinear Probe

Low frequency probe used for imaging deeper structures such as lung parenchyma, abdominal ultrasound and OBGYN scans. Lower ultrasound frequencies have better penetration.

References & Further Reading

  1. Artifacts in diagnostic ultrasound. Hindi, Peterson & Barr. Reports in medical imaging. 2013.
  2. A common misunderstanding in lung ultrasound: The comet tail artifact. Lee et al. Medical Ultrasound. 2018.
  3. Lung B line artifacts and their use. Dietrich et al. Journal of Thoracic Disease. 2016.
  4. Imaging artifacts in echocardiography. Le et al. Anesthesia & Analgesia. 2016.

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