title: A comparison of tumour perfusion assessed by deconvolution-based analysis of dynamic contrast-enhanced CT and MR imaging in patients with squamous cell carcinoma of the upper aerodigestive tract.
abstract: Our aim was to compare the perfusion [blood flow (BF)] values obtained by first-pass dynamic contrast-enhanced (DCE) T2-weighted magnetic resonance (MR) and computed tomography (CT) imaging of squamous cell carcinoma (SCC) in the upper aerodigestive tract in the same patient population. Seventeen patients with histologically proven primary SCC of the upper aerodigestive tract were prospectively evaluated. The perfusion CT studies were obtained using a 16-row multi-slice CT scanner running a commercial software package with a deconvolution-based technique; while the perfusion MR studies (1.5 T) were analysed with in-house-written MR perfusion software based also on a deconvolution technique. The mean perfusion values of SCC assessed by perfusion CT and MR imaging were 68.93 +/- 31.61 and 81.56 +/- 49.25 ml/min/100 g, respectively. The Bland-Altman graph showed a proportional error in the perfusion values measured by DCE-CT and -MR imaging; however, the degree of agreement was acceptable (95% limits of agreement: -66.1 to 40.8). Regression analysis of the perfusion values demonstrated significant correlation between the modalities: BF(MR) = 1.34 x BF(CT) - 10.93 (P < 0.0005, r (2) = 0.74). The parametric maps generated by both modalities provided insights into the tumour perfusion, while analysis of the obtained perfusion values demonstrated that both modalities may be used interchangeably in SCC in the upper aerodigestive tract.
authors.affiliation: Department of Diagnostic and Interventional Radiology, Johann Wolfgang University Hospital, Theodor Stern Kai 7, 60590, Frankfurt, Germany. s.bisdas@med.uni-frankfurt.de
authors.forename: Sotirios
authors.initials: S
authors.lastname: Bisdas
authors.forename: Leon
authors.initials: L
authors.lastname: Medov
authors.forename: Mehran
authors.initials: M
authors.lastname: Baghi
authors.forename: George N
authors.initials: GN
authors.lastname: Konstantinou
authors.forename: Jens
authors.initials: J
authors.lastname: Wagenblast
authors.forename: Choon Hua
authors.initials: CH
authors.lastname: Thng
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Vogl
authors.forename: Tong San
authors.initials: TS
authors.lastname: Koh
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000098:blood supply*; D003287:Contrast Media; D006258:Head and Neck Neoplasms / Q000098:blood supply*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D011446:Prospective Studies; D012039:Regional Blood Flow; D018709:Statistics, Nonparametric; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media