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  • Title: Real-time elastography of hepatic thermal lesions in vitro: histopathological correlation.
    Author: Wiggermann P, Jung EM, Glöckner S, Hoffstetter P, Uller W, Vasilj A, Schreyer A, Stroszczynski C.
    Journal: Ultraschall Med; 2012 Apr; 33(2):170-4. PubMed ID: 22161611.
    Abstract:
    PURPOSE: To evaluate the reliability of elastography, a new ultrasonographic method, for delineating thermal lesion boundaries in porcine liver tissue by comparing lesion dimensions determined by real-time elastography with the findings at gross pathology. MATERIALS AND METHODS: A total of 15 thermal lesions with diameters ranging from 17 to 60 mm were created using radiofrequency ablation (RFA). Color-coded elastography was performed by one experienced examiner, using a 6 - 15 MHz high frequency linear transducer (LOGIQ E9, GE). Lesions were examined using B-mode and real-time elastography (RTE). Lesion detection, delineation and size were assessed using B-mode and RTE immediately after each thermal ablation ( < 5 min). Measurements of the sections representing the same image plane used for elastography were taken during pathologic examination and compared to the measurements obtained from the elastograms. RESULTS: In our sample a statistically significant correlation in vitro between RTE and pathological measurements with respect to the lesion's principal axis and area (r2 = 0.9338 long axis, r2 = 0.8998 short axis and r2 = 0.9676 area) was found. Overall, elastography slightly underestimated the lesion size, as judged by the digitalized pathologic images. CONCLUSION: These results support that RTE outperforms conventional B-mode ultrasound and could potentially be used for the routine assessment of thermal therapies.
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