MR visible localization device for radiographic-pathologic correlation of surgical specimens.

Abstract:

PURPOSE:The detection of small parenchymal hepatic lesions identified by preoperative imaging remains a challenge for traditional pathologic methods in large specimens. We developed a magnetic resonance imaging (MRI) compatible localization device for imaging of surgical specimens aimed to improve identification and localization of hepatic lesions ex vivo. MATERIALS AND METHODS:The device consists of two stationary and one removable MR-visible grids lined with silicone gel, creating an orthogonal 3D matrix for lesion localization. To test the device, five specimens of swine liver with a random number of lesions created by microwave ablation were imaged on a 3T MR scanner. Two readers independently evaluated lesion coordinates and size, which were then correlated with sectioning guided by MR imaging. RESULTS:All lesions (n=38) were detected at/very close to the expected localization. Inter-reader agreement of lesion localization was almost perfect (0.92). The lesion size estimated by MRI matched macroscopic lesion size in cut specimen (±2mm) in 34 and 35, respectively, out of 38 lesions. CONCLUSION:Use of this MR compatible device for ex vivo imaging proved feasible for detection and three-dimensional localization of liver lesions, and has potential to play an important role in the ex vivo examination of surgical specimens in which pathologic correlation is clinically important.

journal_name

Magn Reson Imaging

authors

Kinner S,Schubert TB,Nocerino EA,Hynes S,Colgan TJ,Loeffler AG,Brace C,Reeder SB,Winslow E

doi

10.1016/j.mri.2016.11.021

subject

Has Abstract

pub_date

2017-04-01 00:00:00

pages

159-163

eissn

0730-725X

issn

1873-5894

pii

S0730-725X(16)30234-X

journal_volume

37

pub_type

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