PURPOSE: To compare the reliability of T(1)-weighted, T(2)-weighted, and different phases of dynamic contrast-enhanced MRI in the detection and reproducible size assessment of known carcinoid hepatic metastases. MATERIALS AND METHODS: 22 patients with known carcinoid hepatic metastases qualified for the study. Three readers reviewed MRI images twice independently at sessions that were >2 weeks apart. The best sequences for metastases conspicuity, number and size, and reproducibility of size were compared subjectively. Linear mixed models were used to compare the number and size of metastases between readers and sequences, with the significance level set at p < 0.05. RESULTS: The best overall sequence rated was T(2) FSE (fast spin-echo). The average numbers of metastases was equivalent using T(1)-weighted arterial and T(2) FSE but less for T(2) FRFSE (fast-recovery, fast spin-echo) or delayed imaging. 1,067 lesions were detected and 66 were measured twice by three readers. There was no significant difference between the sequences or between the readings in size measurement when the same sequence was used. However, there was a difference among sequences for size of metastases (p < 0.001). CONCLUSION: T(2) FSE can be used as a basic sequence in detecting and monitoring the size of carcinoid hepatic metastases and may serve as the primary sequence in patients with contrast allergy or at risk for nephrogenic systemic fibrosis.
PURPOSE: To compare the reliability of T(1)-weighted, T(2)-weighted, and different phases of dynamic contrast-enhanced MRI in the detection and reproducible size assessment of known carcinoid hepatic metastases. MATERIALS AND METHODS: 22 patients with known carcinoid hepatic metastases qualified for the study. Three readers reviewed MRI images twice independently at sessions that were >2 weeks apart. The best sequences for metastases conspicuity, number and size, and reproducibility of size were compared subjectively. Linear mixed models were used to compare the number and size of metastases between readers and sequences, with the significance level set at p < 0.05. RESULTS: The best overall sequence rated was T(2) FSE (fast spin-echo). The average numbers of metastases was equivalent using T(1)-weighted arterial and T(2) FSE but less for T(2) FRFSE (fast-recovery, fast spin-echo) or delayed imaging. 1,067 lesions were detected and 66 were measured twice by three readers. There was no significant difference between the sequences or between the readings in size measurement when the same sequence was used. However, there was a difference among sequences for size of metastases (p < 0.001). CONCLUSION: T(2) FSE can be used as a basic sequence in detecting and monitoring the size of carcinoid hepatic metastases and may serve as the primary sequence in patients with contrast allergy or at risk for nephrogenic systemic fibrosis.
Authors: Gustavo Felipe Luersen; W Wei; Eric P Tamm; Priya R Bhosale; Janio Szklaruk Journal: J Comput Assist Tomogr Date: 2016 Sep-Oct Impact factor: 1.826
Authors: Danielle M Hari; Stephanie L Goff; Heidi J Reich; Anna M Leung; Myung-Shin Sim; Ji Hey Lee; Edward Wolin; Farin Amersi Journal: World J Gastrointest Surg Date: 2013-08-27
Authors: Anna-Karin Elf; Mats Andersson; Olof Henrikson; Oscar Jalnefjord; Maria Ljungberg; Johanna Svensson; Bo Wängberg; Viktor Johanson Journal: World J Surg Date: 2018-02 Impact factor: 3.352