scholarly journals Stratification of Tetralogy of Fallot and Status of Pulmonary Artery by Cardiac CT (Pulmonary Angiography)

2019 ◽  
Vol 8 (36) ◽  
pp. 2787-2792
Author(s):  
Ajad Kumar Sarawagi ◽  
Varsha Sodani ◽  
Rajendra Kumar Sodani ◽  
Mahesh Verma
Keyword(s):  
Pulmonary Artery ◽  
Tetralogy Of Fallot ◽  
Cardiac Ct ◽  
Pulmonary Angiography ◽  
Ct Pulmonary Angiography

Dual-energy MDCT: Comparison of pulmonary artery enhancement on dedicated CT pulmonary angiography, routine and low contrast volume studies

2011 ◽  
Vol 79 (2) ◽  
pp. e11-e17 ◽  
Author(s):  
Myrna C.B. Godoy ◽  
Samantha L. Heller ◽  
David P. Naidich ◽  
Bernard Assadourian ◽  
Christianne Leidecker ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Pulmonary Angiography ◽  
Dual Energy ◽  
Ct Pulmonary Angiography ◽  
Low Contrast ◽  
Contrast Volume

scholarly journals Pulmonary Arterial Dilatation: Imaging Evaluation Using Multidetector Computed Tomography

2021 ◽  
Author(s):  
Sreenivasa Narayana Raju ◽  
Niraj Nirmal Pandey ◽  
Arun Sharma ◽  
Amarinder Singh Malhi ◽  
Siddharthan Deepti ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Bronchial Tree ◽  
Pulmonary Angiography ◽  
Ct Pulmonary Angiography ◽  
Imaging Evaluation ◽  
Cross Sectional ◽  
Clinical Background ◽  
Cross Sectional Imaging ◽  
Life Threatening ◽  
Pulmonary Arterial

AbstractPulmonary artery dilatation comprises a heterogeneous group of disorders. Early diagnosis is important as the presentation may be incidental, chronic, or acute and life threatening depending upon the etiology. Cross-sectional imaging plays an important role, with CT pulmonary angiography being regarded as the first line investigation in the evaluation of pulmonary artery pathologies. Moreover, effects of pulmonary artery lesions on proximal and distal circulation can also be ascertained with the detection of associated conditions. Special attention should also be given to the left main coronary artery and the trachea-bronchial tree as they may be extrinsically compressed by the dilated pulmonary artery. In context of an appropriate clinical background, CT pulmonary angiography also helps in treatment planning, prognostication, and follow-up of these patients. This review mainly deals with imaging evaluation of the pulmonary arterial dilatations on CT with emphasis on the gamut of etiologies in the adult as well as pediatric populations.

scholarly journals Effect of iterative reconstruction algorithm levels on noise index and figure-of-merit in CT pulmonary angiography examinations

2020 ◽  
Vol 28 (5) ◽  
pp. 893-903
Author(s):  
H.H. Harun ◽  
M.K.A. Karim ◽  
Z. Abbas ◽  
A. Sabarudin ◽  
S.C. Muniandy ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Pulmonary Artery ◽  
Iterative Reconstruction ◽  
Figure Of Merit ◽  
Pulmonary Angiography ◽  
Volume Data ◽  
Ct Pulmonary Angiography ◽  
Increase With Increase ◽  
The Mean

PURPOSE: To evaluate the influence of iterative reconstruction (IR) levels on Computed Tomography (CT) image quality and to establish Figure of Merit (FOM) value for CT Pulmonary Angiography (CTPA) examinations. METHODS: Images of 31 adult patients who underwent CTPA examinations in our institution from March to April 2019 were retrospectively collected. Other data, such as scanning parameters, radiation dose and body habitus information from the subjects were also recorded. Six different levels of IR were applied to the volume data of the subjects. Five circles of the region of interest (ROI) were drawn in five different arteries namely, pulmonary trunk, right pulmonary artery, left pulmonary artery, ascending aorta and descending aorta. The mean Signal-to-noise ratio (SNR) was obtained, and the FOM was calculated in a fraction of the SNR2 divided by volume-weighted CT dose index (CTDIvol) and SNR2 divided by the size-specific dose estimates (SSDE). RESULTS: Overall, we observed that the mean value of CTDIvol and SSDE were 13.79±7.72 mGy and 17.25±8.92 mGy, respectively. Notably, SNR values significantly increase with increase of the IR level (p < 0.05). There are also significant differences (p < 0.05) in the FOM for both SNR2/SSDE and SNR2/CTDIvol attained in different IR levels. CONCLUSION: We successfully evaluate the value of radiation dose and image quality performance and set up a figure of merit for both parameters to further verify scanning protocols by radiology personnel.

Optimisation of CT pulmonary angiography by applying cardiac CT techniques

2015 ◽  
Vol 70 ◽  
pp. S3
Author(s):  
Muhammad Imran Yousuf ◽  
Jonathan Malloy ◽  
Raghuram Sathyanarayna
Keyword(s):  
Cardiac Ct ◽  
Pulmonary Angiography ◽  
Ct Pulmonary Angiography

scholarly journals Dynamic vascular changes in chronic thromboembolic pulmonary hypertension after pulmonary endarterectomy

2020 ◽  
Vol 10 (4) ◽  
pp. 204589402090788 ◽  
Author(s):  
Dieuwertje Ruigrok ◽  
Natalia J. Braams ◽  
Esther J. Nossent ◽  
Peter I. Bonta ◽  
Anco Boonstra ◽  
...  
Keyword(s):  
Pulmonary Hypertension ◽  
Pulmonary Artery ◽  
Chronic Thromboembolic Pulmonary Hypertension ◽  
Pulmonary Angiography ◽  
Vascular Lesions ◽  
Heart Catheterization ◽  
Pulmonary Endarterectomy ◽  
Ct Pulmonary Angiography ◽  
Thromboembolic Pulmonary Hypertension ◽  
Residual Pulmonary Hypertension

Residual pulmonary hypertension is an important sequela after pulmonary endarterectomy for chronic thromboembolic pulmonary hypertension. Recurrent thrombosis or embolism could be a contributor to this residual pulmonary hypertension but the potential extent of its role is unknown in part because data on incidence are lacking. We aimed to analyze the incidence of new intravascular abnormalities after pulmonary endarterectomy and determine hemodynamic and functional implications. A total of 33 chronic thromboembolic pulmonary hypertension patients underwent routine CT pulmonary angiography before and six months after pulmonary endarterectomy, together with right heart catheterization and exercise testing. New vascular lesions were defined as (1) a normal pulmonary artery before pulmonary endarterectomy and containing a thrombus, web, or early tapering six months after pulmonary endarterectomy or (2) a pulmonary artery already containing thrombus, web, or early tapering at baseline, but increasing six months after pulmonary endarterectomy. Nine of 33 (27%) chronic thromboembolic pulmonary hypertension patients showed new vascular lesions on CT pulmonary angiography six months after pulmonary endarterectomy. In a subgroup of patients undergoing CT pulmonary angiography 18 months after pulmonary endarterectomy, no further changes in lesions were noted. Hemodynamic and functional outcomes were not different between patients with and without new vascular lesions. New vascular lesions are common after pulmonary endarterectomy for chronic thromboembolic pulmonary hypertension; currently their origin, dynamics, and long-term consequences remain unknown.

scholarly journals Pulmonary Artery Pseudoaneurysm due to Mucormycosis: Case Report and Literature Review

2020 ◽  
Vol 10 ◽  
pp. 55 ◽  
Author(s):  
Roberto Mempin ◽  
Nader Kamangar
Keyword(s):  
Pulmonary Artery ◽  
B Cell Lymphoma ◽  
Pulmonary Angiography ◽  
Ct Pulmonary Angiography ◽  
Artery Pseudoaneurysm ◽  
Pulmonary Mucormycosis ◽  
Large B Cell Lymphoma ◽  
Iodinated Contrast ◽  
Immunosuppressed Patients ◽  
Pulmonary Artery Pseudoaneurysm

Pulmonary artery pseudoaneurysm (PAP) is a rare vascular phenomenon with a high mortality rate, as these entities can enlarge, rupture, and lead to asphyxiation. Pulmonary mucormycosis (PM), an underdiagnosed but an increasingly seen entity in the era of chemotherapy and immunosuppression, is a known cause of PAP, and should be suspected in immunosuppressed patients with hemoptysis. We present a case of PAP due to PM in a patient with recently diagnosed diffuse large B-cell lymphoma of the liver who underwent chemotherapy and developed acute cavitary lung disease and hemoptysis. His diagnosis was delayed due to the withholding of iodinated contrast with computer tomography (CT) imaging in the setting of renal failure. He then underwent embolization of his PAP with resolution of his hemoptysis. PAP is an uncommon cause of hemoptysis that can be diagnosed with CT pulmonary angiography, and mucormycosis is a known but rare cause of PAP in patients with malignancy receiving immunosuppression.

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