Comparison of extended field of view and dual image ultrasound techniques: Accuracy and reliability of distance measurements in phantom study

Tin Cheung Ying, Man Hong Sin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)


This study was undertaken to investigate and compare the accuracy and reliability of dual image and extended field-of-view (EFOV) ultrasound (US) techniques in distance measurements using acoustic phantoms. Ten tissue phantoms were constructed and were scanned twice with an interval of 3 days by two operators. Measurements of various known distance (ranging from 4.6 to 7.2 cm) in the phantoms were made with dual image and EFOV US. Results showed that both dual image and EFOV US have a high accuracy and reliability in distance measurements, with the EFOV US (r = 0.997 to 0.998, reproducibility = 99.8%, repeatability = 98.2 to 99.8%) being slightly more accurate and reliable than dual image US (r = 0.948 to 0.981, reproducibility = 94.6%, repeatability = 89.6 to 97.9%). EFOV US has a higher accuracy and reliability than dual image US in distance measurements. However, the dual image US is a useful alternative with a high accuracy and reliability when EFOV US is not available.
Original languageEnglish
Pages (from-to)79-83
Number of pages5
JournalUltrasound in Medicine and Biology
Issue number1
Publication statusPublished - 1 Jan 2005


  • Distance measurement
  • Dual image
  • Extended field of view
  • Ultrasound

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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