TY - JOUR
T1 - Biopsy guided by real-time sonography fused with MRI
T2 - a phantom study
AU - Ewertsen, Caroline
AU - Grossjohann, Hanne Sønder
AU - Nielsen, Kristina Rue
AU - Torp-Pedersen, Søren
AU - Nielsen, Michael Bachmann
PY - 2008/6
Y1 - 2008/6
N2 - OBJECTIVE: The purpose of our study was to test the accuracy of sonographically guided biopsies in a phantom of structures not visible on sonography but shown on MRI by using commercially available sonography systems with image fusion software.MATERIALS AND METHODS: A previously recorded MRI examination from a custom-made phantom was loaded into the sonography system. The phantom contained spheres that were invisible to sonography and contained red dye. The red dye was visible in the biopsy if it was successful. The images were coregistered using structures visible on both sonography and MRI, and biopsies were taken. The biopsy procedure was continued until a biopsy was successful, and the number of needle passes and time spent were registered.RESULTS: A total of 130 targets were hit. Ten minutes was used for loading the MRI data set and the coregistration; 94 of the 130 biopsies (72.3%) were successful at the first needle pass. The median number of needle passes until a successful biopsy was obtained was one (range, 1-7).CONCLUSION: The described method was successful in obtaining an adequate sample in a phantom.
AB - OBJECTIVE: The purpose of our study was to test the accuracy of sonographically guided biopsies in a phantom of structures not visible on sonography but shown on MRI by using commercially available sonography systems with image fusion software.MATERIALS AND METHODS: A previously recorded MRI examination from a custom-made phantom was loaded into the sonography system. The phantom contained spheres that were invisible to sonography and contained red dye. The red dye was visible in the biopsy if it was successful. The images were coregistered using structures visible on both sonography and MRI, and biopsies were taken. The biopsy procedure was continued until a biopsy was successful, and the number of needle passes and time spent were registered.RESULTS: A total of 130 targets were hit. Ten minutes was used for loading the MRI data set and the coregistration; 94 of the 130 biopsies (72.3%) were successful at the first needle pass. The median number of needle passes until a successful biopsy was obtained was one (range, 1-7).CONCLUSION: The described method was successful in obtaining an adequate sample in a phantom.
KW - Biopsy/methods
KW - Computer Systems
KW - Image Enhancement/methods
KW - Magnetic Resonance Imaging, Interventional/instrumentation
KW - Subtraction Technique
KW - Ultrasonography, Interventional/instrumentation
U2 - 10.2214/AJR.07.2587
DO - 10.2214/AJR.07.2587
M3 - Journal article
C2 - 18492923
SN - 0361-803X
VL - 190
SP - 1671
EP - 1674
JO - American Journal of Roentgenology
JF - American Journal of Roentgenology
IS - 6
ER -