OBJECTIVE: To report the application of dynamic contrast-enhanced subtraction MRI for detecting recurrences in aggressive or malignant soft tissue tumors. DESIGN: The imaging studies consisted of static (T1- and T2-weighted spin-echo) acquisitions, followed by dynamic conventional spin-echo short TR/TE images (at 45 s, 1 min 30 s and 5 min) after a bolus of intravenous contrast medium. Contrast images were subtracted from the precontrast scan on the console. PATIENTS: Ninety-eight patients were studied who had had aggressive or malignant soft tissue tumors treated by surgery, and were followed up to assess recurrences. RESULTS: Subtraction MRI characterized recurrences better than routine sequences in 10 patients (1 lesion was seen only with this technique, 6 were better delineated, and 3 inflammatory pseudotumors were identified), and less well in 4 cases. CONCLUSION: As the number of levels studied on dynamic images is limited, and all but one recurrence were detected on T2-weighted images, it remains logical to start the examination with T2-weighted spin-echo images, and to use the dynamic study only if contrast injection is required.
OBJECTIVE: To report the application of dynamic contrast-enhanced subtraction MRI for detecting recurrences in aggressive or malignant soft tissue tumors. DESIGN: The imaging studies consisted of static (T1- and T2-weighted spin-echo) acquisitions, followed by dynamic conventional spin-echo short TR/TE images (at 45 s, 1 min 30 s and 5 min) after a bolus of intravenous contrast medium. Contrast images were subtracted from the precontrast scan on the console. PATIENTS: Ninety-eight patients were studied who had had aggressive or malignant soft tissue tumors treated by surgery, and were followed up to assess recurrences. RESULTS: Subtraction MRI characterized recurrences better than routine sequences in 10 patients (1 lesion was seen only with this technique, 6 were better delineated, and 3 inflammatory pseudotumors were identified), and less well in 4 cases. CONCLUSION: As the number of levels studied on dynamic images is limited, and all but one recurrence were detected on T2-weighted images, it remains logical to start the examination with T2-weighted spin-echo images, and to use the dynamic study only if contrast injection is required.
Authors: Nisreen S Ezuddin; Juan Pretell-Mazzini; Raphael L Yechieli; Darcy A Kerr; Breelyn A Wilky; Ty K Subhawong Journal: Skeletal Radiol Date: 2018-05-21 Impact factor: 2.199
Authors: Youssef Erfanian; Johannes Grueneisen; Julian Kirchner; Axel Wetter; Lars Erik Podleska; Sebastian Bauer; Thorsten Poeppel; Michael Forsting; Ken Herrmann; Lale Umutlu Journal: Eur J Nucl Med Mol Imaging Date: 2017-05-31 Impact factor: 9.236
Authors: Jeung Il Kim; In Sook Lee; You Seon Song; Se Kyoung Park; Kyung-Un Choi; Jong Woon Song Journal: Br J Radiol Date: 2016-07-26 Impact factor: 3.039
Authors: Lacey F Moore; Mark J Kransdorf; Steven J Buskirk; Mary I O'Connor; David M Menke Journal: Skeletal Radiol Date: 2009-02-17 Impact factor: 2.199