Characterization of Small Incidental Indeterminate Hypoattenuating Hepatic Lesions: Added Value of Single-Phase Contrast-Enhanced Dual-Energy CT Material Attenuation Analysis

AbstractImaging has a pivotal role in the detection and characterization of spine bone tumors (SBTs), especially using magnetic resonance (MR) imaging and computed tomography (CT). Although MR performed with conventional pulse sequences has a robust reliability in the assessment of SBTs, some imaging features of benign lesions and malignancies overlap, making the differential diagnosis challenging. Several imaging tools are now available to perform a correct interpretation of images of SBTs including diffusion-weighted imaging, dynamic contrast-enhanced MR, Dixon sequences, and dual-energy CT. Nevertheless, strengths and weaknesses of imaging modalities should be kept in mind, and it is crucial to be aware of the pitfalls that can be encountered in daily clinical practice when dealing with these lesions. This review provides an overview on the main challenges encountered when dealing with SBTs, providing some tricks of the trade to avoid possible diagnostic traps.

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Single-Phase Dual-Energy CT Allows for Characterization of Renal Masses as Benign or Malignant

Investigative Radiology ◽

10.1097/rli.0b013e3181e33189 ◽

2010 ◽

Vol 45 (7) ◽

pp. 399-405 ◽

Cited By ~ 157

Author(s):

Anno Graser ◽

Christoph R. Becker ◽

Michael Staehler ◽

Dirk A. Clevert ◽

Michael Macari ◽

...

Keyword(s):

Single Phase ◽

Dual Energy ◽

Dual Energy Ct ◽

Renal Masses

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ROLE OF TRIPLE PHASE CONTRAST ENHANCED COMPUTED TOMOGRAPHY IN HEPATIC LESIONS AND THEIR CYTOPATHOLOGICAL CORRELATION

10.36106/ijar/1201308 ◽

2021 ◽

pp. 29-33

Author(s):

Sandeep Kaur ◽

Chaitanya Tapasvi ◽

Sarita Nibhoria ◽

Divya Soin

Keyword(s):

Computed Tomography ◽

Phase Contrast ◽

Imaging Modality ◽

Medical College ◽

Contrast Enhanced ◽

Highly Sensitive ◽

Hepatic Lesions ◽

Enhanced Computed Tomography ◽

Contrast Enhanced Computed Tomography

AIMS: To evaluate the enhancement patterns of hepatic lesions on triple phase contrast enhanced computed tomography and to correlate the CT ndings of hepatic lesions with cytological ndings on ne needle aspiration cytology (FNAC). Settings and Design: This prospective observational study was carried out at Department of Radiodiagnosis, Gobind Singh Medical College and Hospital, Faridkot. The study was approved by the Institutional Ethics Committee. Source of Data: A total of 75 patients who had hepatic lesions on ultrasonography and clinical suspicion of focal hepatic lesions were referred for CECT abdomen. Findings of Triple phase CT for hepatic lesions were correlated with cytopathological ndings. Methods and Material: A Triphasic CECT abdomen was performed on Siemens Somatom Perspective 128 slice scanner in the Department of Radiodiagnosis, Guru Gobind Singh Medical College and Hospital, Faridkot. The entire liver was scanned successively, in arterial, portovenous and delayed phases. A 5mm collimation and 5mm/sec table speed were used. After obtaining a digital scout view, unenhanced scan of the liver was obtained.1.5ml/kg body weight of 300mgI/ml iodinated contrast material was administered by using a pressure injector at a rate of 3.0 mL/s using a pressure injector.USG/CT guided FNAC was done. CT imaging ndings were classied as benign or malignant by correlating them with cytopathological ndings. Results: The present study inferred that Triple phase CECT is a highly sensitive and specic imaging modality for detection and characterization of hepatic lesions with an overall sensitivity and specicity of 100.00 % (95% C.I. 92.45% to 100%) and 92.86% (95% C.I. 76.50% to 99.12%)respectively when correlated with cytopathological ndings. Conclusions: It is inferred from our study that triple phase CECT is highly sensitive and specic imaging modality for detection and characterization of hepatic lesions with wide availability in the present scenario.

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Advanced Virtual Monoenergetic Imaging: Improvement of Visualization and Differentiation of Intramuscular Lesions in Portal-Venous-phase Contrast-enhanced Dual-energy CT

Academic Radiology ◽

10.1016/j.acra.2019.02.014 ◽

2019 ◽

Vol 26 (11) ◽

pp. 1457-1465

Author(s):

Mareen S. Kraus ◽

Nadja Selo ◽

Lena S. Kiefer ◽

Michael Esser ◽

Omar M. Albtoush ◽

...

Keyword(s):

Phase Contrast ◽

Dual Energy ◽

Dual Energy Ct ◽

Portal Venous Phase ◽

Contrast Enhanced ◽

Virtual Monoenergetic Imaging ◽

Venous Phase ◽

Monoenergetic Imaging

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Diagnosis of Pulmonary Embolism in Unenhanced Dual Energy CT Using an Electron Density Image

Diagnostics ◽

10.3390/diagnostics11101841 ◽

2021 ◽

Vol 11 (10) ◽

pp. 1841

Author(s):

Kyungsoo Bae ◽

Kyung-Nyeo Jeon

Keyword(s):

Pulmonary Embolism ◽

Electron Density ◽

Dual Energy ◽

Added Value ◽

Dual Energy Ct ◽

Promising Tool ◽

Contrast Enhanced ◽

Density Image ◽

Anatomical Information

Dual-energy computed tomography (CT) is a promising tool, providing both anatomical information and material properties. Using spectral information such as iodine mapping and virtual monoenergetic reconstruction, dual-energy CT showed added value over pulmonary CT angiography in the diagnosis of pulmonary embolism. However, the role of non-contrast-enhanced dual energy CT in pulmonary embolism has never been reported. Here, we report a case of acute pulmonary embolism detected on an electron density image from an unenhanced dual-energy CT using a dual-layer detector system.

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