Comparisons of lesion detectability in ultrasound images acquired using time-shift compensation and spatial compounding

The effects of aberration, time-shift compensation, and spatial compounding on the discrimination of positive-contrast lesions in ultrasound b-scan images are investigated using a two-dimensional (2-D) array system and tissue-mimicking phantoms. Images were acquired within an 8.8/spl times/12-mm/sup...

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Veröffentlicht in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control Jg. 51; H. 12; S. 1649 - 1659
Hauptverfasser: Lacefield, J.C., Pilkington, W.C., Waag, R.C.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.12.2004
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Abdomen
Aberration
Acoustic beams
Acoustic imaging
Acoustic pulses
Acoustic signal detection
Acoustics
Algorithms
Biological and medical sciences
Breast
Breast Neoplasms - diagnostic imaging
Compensation
Compounding
Computer Simulation
Exact sciences and technology
Focusing
Fundamental areas of phenomenology (including applications)
General equipment and techniques
Humans
Image contrast
Image Enhancement - methods
Image Interpretation, Computer-Assisted - methods
Imaging phantoms
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Investigative techniques, diagnostic techniques (general aspects)
Lesions
Medical sciences
Miscellaneous. Technology
Phantoms, Imaging
Physics
Reproducibility of Results
Sensitivity and Specificity
Time Factors
Transducers
Ultrasonic imaging
Ultrasonic investigative techniques
Ultrasonics, quantum acoustics, and physical effects of sound
Ultrasonography, Mammary - instrumentation
Ultrasonography, Mammary - methods
Ultrasound
Human
Statistical analysis
B scan
Multiple view
Tissue
Focusing
Abdominal wall
Breast
Delay time
Mammary gland
Lesion
Plane antenna
Acoustic image
ISSN:0885-3010, 1525-8955
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Zusammenfassung:The effects of aberration, time-shift compensation, and spatial compounding on the discrimination of positive-contrast lesions in ultrasound b-scan images are investigated using a two-dimensional (2-D) array system and tissue-mimicking phantoms. Images were acquired within an 8.8/spl times/12-mm/sup 2/ field of view centered on one of four statistically similar 4-mm diameter spherical lesions. Each lesion was imaged in four planes offset by successive 45/spl deg/ rotations about the central scan line. Images of the lesions were acquired using conventional geometric focusing through a water path, geometric focusing through a 35-mm thick distributed aberration phantom, and time-shift compensated transmit and receive focusing through the aberration phantom. The views of each lesion were averaged to form sets of water path, aberrated, and time-shift compensated 4:1 compound images and 16:1 compound images. The contrast ratio and detectability index of each image were computed to assess lesion differentiation. In the presence of aberration representative of breast or abdominal wall tissue, time-shift compensation provided statistically significant improvements of contrast ratio but did not consistently affect the detectability index, and spatial compounding significantly increased the detectability index but did not alter the contrast ratio. Time-shift compensation and spatial compounding thus provide complementary benefits to lesion detection.
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ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2004.1386682