scholarly journals Detection of Inflammatory Aortopathies Using Multimodality Imaging

2019 ◽  
Vol 12 (7) ◽  
Author(s):  
John P. Bois ◽  
Vidhu Anand ◽  
Nandan S. Anavekar

Diagnosis of the inflammatory aortopathies and importantly, their distinction in the later stages of disease from genetically mediated or acquired (degenerative) aortopathy remains a challenging clinical problem. Historically, the diagnosis of inflammatory aortopathy has required tissue sampling and pathological assessment. Although histological diagnosis remains an important diagnostic criterion, the ability to obtain sufficient tissue samples is problematic and requires invasive approaches that pose important risk. Continuing refinement in the capabilities of multimodality imaging, including ultrasound, computed tomography, magnetic resonance imaging, and positron emission tomography provides important insights into the broad spectrum of disease which comprise the inflammatory aortopathies. This review examines the current and emerging role of multimodality imaging in the evaluation of aortitis.

2016 ◽  
Vol 36 (4) ◽  
pp. 702-708 ◽  
Author(s):  
Ana Moraga ◽  
Vanessa Gómez-Vallejo ◽  
María Isabel Cuartero ◽  
Boguslaw Szczupak ◽  
Eneko San Sebastián ◽  
...  

The influence of toll-like receptor 4 on neurogenesis and inflammation has been scarcely explored so far by using neuroimaging techniques. For this purpose, we performed magnetic resonance imaging and positron emission tomography with 3′-deoxy-3′-[18F]fluorothymidine and [11C]PK11195 at 2, 7, and 14 days following cerebral ischemia in TLR4+/+ and TLR4−/− mice. MRI showed similar infarction volumes in both groups. Despite this, positron emission tomography with 3′-deoxy-3′-[18F]fluorothymidine and [11C]PK11195 evidenced an increase of neurogenesis and a decrease of inflammation in TLR4−/− mice after ischemia. These results evidence the versatility of neuroimaging techniques to monitor the role of toll-like receptor 4 after cerebral ischemia.


Author(s):  
Michael J. Weston

This chapter acts as an introduction to Chapters 10–16 and highlights the uses of plain radiography, fluoroscopy, ultrasound, computed tomography, positron emission tomography, magnetic resonance imaging, radionuclide studies, and image-guided intervention. All imaging studies work best if a specific question is asked. This helps to choose both the best modality and protocol to answer the question. The clinical information given will often assist the interpretation of the findings. The more vague the indication for a scan, the less likely that useful information will be provided. Both the requesting clinician and the radiologist need to be clear how the scan result will alter management. Performing imaging procedures that will not alter the outcome is wasteful and unkind to the patient.


2018 ◽  
Vol 17 ◽  
pp. 153601211881174 ◽  
Author(s):  
Courtney Lawhn-Heath ◽  
Robert R. Flavell ◽  
David E. Korenchan ◽  
Timothy Deller ◽  
Spencer Lake ◽  
...  

Purpose: To assess the utility of furosemide diuresis and the role of an improved scatter correction algorithm in reducing scatter artifact severity on Ga-68- Prostate-specific membrane antigen (PSMA)-11 positron emission tomography (PET). Materials and Methods: A total of 139 patients underwent Ga-68-PSMA-11 PET imaging for prostate cancer: 47 non-time-of-flight (non-TOF) PET/computed tomography, 51 PET/magnetic resonance imaging (MRI) using the standard TOF scatter correction algorithm, and 41 PET/MRI using an improved TOF scatter correction algorithm. Whole-body PET acquisitions were subdivided into 3 regions: around kidneys; between kidneys and bladder; and around bladder. The images were reviewed, and scatter artifact severity was rated using a Likert-type scale. Results: The worst scatter occurred when using non-TOF scatter correction without furosemide, where 42.1% of patients demonstrated severe scatter artifacts in 1 or more regions. Improved TOF scatter correction resulted in the smallest percentage of studies with severe scatter (6.5%). Scatter ratings by region were lowest using improved TOF scatter correction. Furosemide reduced mean scatter severity when using non-TOF and standard TOF. Conclusions: Both furosemide and scatter correction algorithm play a role in reducing scatter in PSMA PET. Improved TOF scatter correction resulted in the lowest scatter severity.


Sign in / Sign up

Export Citation Format

Share Document