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Evaluation of the particulate concentration in a gelatin-based phantom for sonographically guided lesion biopsy.
MedLine Citation:
PMID:  23887958     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Objectives- The purpose of this study was to determine the particulate concentration in a gelatin-based ultrasound phantom for lesion biopsy at 6 cm in depth to reduce visualization of the biopsy needle in the near field, simulating subcutaneous fat and tissue echogenicity, and maintain target lesion visualization. Methods- Four gelatin-based phantoms with cornstarch at concentrations of 4, 8, 12, and 16 g/L and an anechoic gelatin target at 7 cm in depth were rated on a 5-point scale by readers for visibility of the target lesion, similarity of near-field to abdominal subcutaneous fat echogenicity, and visibility of a 22-gauge spinal needle in the phantom. A timed sonographically guided localization task was performed on the anechoic target by 4 radiology residents using the 22-gauge spinal needle. Results were analyzed by comparative statistical analysis. Results- An increasing particulate concentration did not alter the similarity of near-field to abdominal subcutaneous fat echogenicity (P = .6) but did significantly reduce visibility of the anechoic target at a cornstarch concentration of 16 g/L (P = .04) and the 22-gauge needle at 12 g/L (P = .03). Decreased visualization of the needle or target lesion did not affect the time for needle localization of the anechoic target (P = .96). Conclusions- The optimal ultrasound phantom cornstarch concentration was 12 g/L to reduce visualization of the spinal needle, simulating subcutaneous fat echogenicity while maintaining target lesion visualization.
Authors:
Jan F Gerstenmaier; Colin J McCarthy; David P Brophy; Colin P Cantwell
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine     Volume:  32     ISSN:  1550-9613     ISO Abbreviation:  J Ultrasound Med     Publication Date:  2013 Aug 
Date Detail:
Created Date:  2013-07-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8211547     Medline TA:  J Ultrasound Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1471-5     Citation Subset:  IM    
Affiliation:
DTMH, MCTM, MRCSEd, FFR, Department of Radiology, St Vincent's University Hospital, Elm Park, Dublin 4, Ireland. gerstenmaierj@fastmail.us.
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