Assessment of an Advanced Monoenergetic Reconstruction Technique in Dual-Energy Computed Tomography of Head and Neck Cancer

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• 作者：Moritz H. Albrecht ; Jan-Erik Scholtz ; Johannes Kraft ; Ralf W. Bauer…
• 关键词：Monoenergetic Plus ; Dual ; Energy CT ; Monochromatic imaging ; Computed Tomography ; Head and Neck Cancer
• 刊名：European Radiology
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：25
• 期：8
• 页码：2493-2501
• 全文大小：2,261 KB
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• 作者单位：Moritz H. Albrecht (1)
  Jan-Erik Scholtz (1)
  Johannes Kraft (1)
  Ralf W. Bauer (1)
  Moritz Kaup (1)
  Patricia Dewes (1)
  Andreas M. Bucher (1)
  Iris Burck (1)
  Jens Wagenblast (2)
  Thomas Lehnert (1)
  J. Matthias Kerl (1)
  Thomas J. Vogl (1)
  Julian L. Wichmann (1) (3)
  
  1. Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
  2. Department of Otolaryngology, Head and Neck Surgery, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
  3. Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA
  
• 刊物类别：Medicine
• 刊物主题：Medicine & Public Health
  Imaging and Radiology
  Diagnostic Radiology
  Interventional Radiology
  Neuroradiology
  Ultrasound
  Internal Medicine
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1084

文摘

Objectives To define optimal keV settings for advanced monoenergetic (Mono+) dual-energy computed tomography (DECT) in patients with head and neck squamous cell carcinoma (SCC). Methods DECT data of 44 patients (34 men, mean age 55.5?±-6.0?years) with histopathologically confirmed SCC were reconstructed as 40, 55, 70?keV Mono + and M_0.3 (30?% 80?kV) linearly blended series. Attenuation of tumour, sternocleidomastoid muscle, internal jugular vein, submandibular gland, and noise were measured. Three radiologists with >3?years of experience subjectively assessed image quality, lesion delineation, image sharpness, and noise. Results The highest lesion attenuation was shown for 40?keV series (248.1?±-4.1 HU), followed by 55?keV (150.2?±-5.5 HU; P--.001). Contrast-to-noise ratio (CNR) at 40?keV (19.09?±-3.84) was significantly superior to all other reconstructions (55?keV, 10.25?±-.11; 70?keV, 7.68?±-.31; M_0.3, 5.49?±-.28; all P-lt;-.005). Subjective image quality was highest for 55?keV images (4.53; κ--.38, P--.003), followed by 40?keV (4.14; κ--.43, P-lt;-.001) and 70?keV reconstructions (4.06; κ--.32, P--.005), all superior (P-lt;-.004) to linear blending M_0.3 (3.81; κ--.280, P--.056). Conclusions Mono + DECT at low keV levels significantly improves CNR and subjective image quality in patients with head and neck SCC, as tumour CNR peaks at 40?keV, and 55?keV images are preferred by observers. Key Points -Mono + DECT combines increased contrast with reduced image noise, unlike linearly blended images. -Mono + DECT imaging allows for superior CNR and subjective image quality. -Head and neck tumour contrast-to-noise ratio peaks at 40?keV. -55?keV images are preferred over all other series by observers.