Dual-Energy CT in Head and Neck ImagingReport as inadecuate




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Current Radiology Reports

, 5:19

ENT Imaging

Abstract

Purpose of ReviewTo explain the technique of Dual-energy CT DECT and highlight its applications and advantages in head and neck radiology.

Recent FindingsUsing DECT, additional datasets can be created next to conventional images. In head and neck radiology, three material decomposition algorithms can be used for improved lesion detection and delineation of the tumor. Iodine concentration measurements can aid in differentiating malignant from nonmalignant lymph nodes and benign posttreatment changes from tumor recurrence. Virtual non-calcium images can be used for detection of bone marrow edema. Virtual mono-energetic imaging can be useful for improved iodine conspicuity at lower keV and for reduction of metallic artifacts and increase in signal-to-noise ratio at higher keV.

SummaryDECT and its additional reconstructions can play an important role in head and neck cancer patients, from initial diagnosis and staging, to therapy planning, evaluation of treatment response and follow-up. Moreover, it can be helpful in imaging of infections and inflammation and parathyroid imaging as supplementary reconstructions can be obtained at lower or equal radiation dose compared with conventional single energy scanning.

KeywordsDual-energy CT Spectral CT Head and neck cancer Lymph node imaging Parathyroid adenoma Metal artifact reduction AbbreviationsALARAAs low as reasonably achievable

BMEBone marrow edema

CNRContrast-to-noise ratio

CTComputed tomography

CTAComputed tomography angiography

CE-CTContrast-enhanced CT

DECTDual-energy CT

HNSCCHead and neck squamous cell carcinoma

HUHounsfield units

IMARIterative metal artifact reduction

IOMIodine overlay map

keVKilo electron volt

kVpPeak kilo electron volt

MDCTMultidetector CT

MRIMagnetic resonance imaging

OC imageOptimal contrast image

OPTkeVOptimized image quality keV

PETPositron emission tomography

PTAPeritonsillar abscess

SECTSingle energy CT

SNRSignal-to-noise ratio

SCCSquamous cell carcinoma

VMIVirtual mono-energetic imaging

VNCaVirtual non-calcium

VNCVirtual noncontrast

WAWeighted average

This article is part of the Topical Collection on ENT Imaging.

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Author: Elise D. Roele - Veronique C. M. L. Timmer - Lauretta A. A. Vaassen - Anna M. J. L. van Kroonenburgh - A. A. Postm

Source: https://link.springer.com/







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