Wakabayashi H, Saito J, Taki J, Hashimoto N, Tsuchiya H, Gabata T, Kinuya S. Triple-phase contrast-enhanced MRI for the prediction of preoperative chemotherapeutic effect in patients with osteosarcoma: comparison with (99m)Tc-MIBI scintigraphy.
Skeletal Radiol 2016;
45:87-95. [PMID:
26385785 DOI:
10.1007/s00256-015-2250-1]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 09/03/2015] [Accepted: 09/07/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE
This study aims to determine whether (99m)Tc-MIBI scintigraphy and triple-phase contrast-enhanced magnetic resonance imaging (TCE-MRI) performed during and after preoperative chemotherapy have the power to predict final chemotherapeutic effects in patients with osteosarcoma (OS).
MATERIALS AND METHODS
Seventeen patients underwent (99m)Tc-MIBI scintigraphy and TCE-MRI before and after the middle and last courses of preoperative chemotherapy. As for (99m)Tc-MIBI scintigraphy, an uptake ratio (UR) and a reduction rate of UR (ΔUR(MIBI)) were calculated. As for TCE-MRI, a ratio of contrast to background (CTB) was calculated in the whole tumor area (WA) at each phase on dynamic T1-weighted fat suppression images. Then a ratio of signal (R(WA)) was calculated by dividing CTB at triple-phase by CTB at pre-phase.
RESULTS
Nine and eight patients showed good and poor response in histopathologic evaluation. The sensitivity, specificity, and accuracy for the prediction of histopathological chemotherapeutic effect was 44, 100, 69% in R(WA) at the first phase, 100, 75, 88% in ΔUR(MIBI) after the middle course, 88, 100, 94% in R(WA) at the first phase, and 100, 75, 88% in ΔUR(MIBI) after the last course of the preoperative chemotherapy, respectively.
CONCLUSION
Both (99m)Tc-MIBI scintigrapy and TCE-MRI can predict the tumor response in patients with OS after the completion of the preoperative chemotherapy.
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