Quantification and Characterization of Carotid Calcium with Multi-detector CT-angiography

Object. Middle cerebral artery (MCA) aneurysms can be difficult to detect and characterize. The authors describe the utility and impact of helical computerized tomography (CT) angiography for the evaluation of aneurysms in this location, and compare this modality with digital subtraction (DS) angiography and intraoperative findings. Methods. Two hundred fifty-one patients with suspected cerebral aneurysms underwent CT angiography. Two-dimensional multiplanar reformatted images and three-dimensional CT angiograms were examined by two independent readers in a blinded fashion. Results were compared with findings on DS angiograms to determine the relative efficacy of these modalities in the detection and characterization of aneurysms. Questionnaires completed by neurosurgeons and endovascular therapists were used to determine the impact of CT angiograms on aneurysm management. Twenty-eight patients harboring 31 MCA aneurysms and 26 patients without aneurysms were identified using CT angiography. The sensitivity of CT angiography and DS angiography for MCA aneurysms was 97%; both techniques showed 100% specificity. In 76% of evaluations, the CT angiography studies provided information not available on DS angiography examinations. For the characterization of aneurysms, CT angiography was rated superior (72%) or equal (20%) to DS angiography in 92% of cases evaluated (p < 0.001). Computerized tomography angiography was evaluated as the only study needed for patient triage in 82% of cases (p < 0.001), and as the only study needed for treatment planning in 89% of surgically treated (p < 0.001) and in 63% of endovascularly treated cases (p < 0.001). The information acquired on CT angiograms changed the initial treatment plan in 24 (67%) of these 36 complex lesions (p < 0.01). The aneurysm appearance intraoperatively was identical or nearly identical to that seen on CT angiograms in 17 (89%) of 19 of the surgically treated cases. Conclusions. Computerized tomography angiography has unique advantages over DS angiography and is a viable alternative to the latter modality in the diagnosis, triage, and treatment planning in patients with MCA aneurysms.

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CHARACTERIZATION OF NORMAL FELINE RENAL VASCULAR ANATOMY WITH DUAL-PHASE CT ANGIOGRAPHY

Veterinary Radiology & Ultrasound ◽

10.1111/j.1740-8261.2008.00378.x ◽

2008 ◽

Vol 49 (4) ◽

pp. 350-356 ◽

Cited By ~ 21

Author(s):

ANA V. CCERES ◽

ALLISON L. ZWINGENBERGER ◽

LILLIAN R. ARONSON ◽

WILFRIED MAI

Keyword(s):

Ct Angiography ◽

Vascular Anatomy ◽

Dual Phase ◽

Renal Vascular

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Characterization of culprit lesions in acute coronary syndromes using coronary dual-source CT angiography

Atherosclerosis ◽

10.1016/j.atherosclerosis.2010.02.001 ◽

2010 ◽

Vol 211 (2) ◽

pp. 437-444 ◽

Cited By ~ 114

Author(s):

Tobias Pflederer ◽

Mohamed Marwan ◽

Tiziano Schepis ◽

Dieter Ropers ◽

Martin Seltmann ◽

...

Keyword(s):

Ct Angiography ◽

Acute Coronary Syndromes ◽

Dual Source Ct ◽

Dual Source ◽

Coronary Syndromes

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Characterization of the outcome of CT angiography for pulmonary thromboembolism depending on age group and gender

Brazilian Journal of Radiation Sciences ◽

10.15392/bjrs.v9i2c.1675 ◽

2021 ◽

Vol 9 (2C) ◽

Author(s):

Warley Ferreira Felix ◽

Maria Auxiliadora Fortini Veloso ◽

Marcos Eugênio Silva Abrantes ◽

Ramon Vitor de Miranda

Keyword(s):

Ct Angiography ◽

Pulmonary Thromboembolism ◽

Age Group ◽

And Gender

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Sixteen-row multislice computed tomography angiography in the diagnosis and characterization of intracranial aneurysms: comparison with conventional angiography and intraoperative findings

Journal of Neurosurgery ◽

10.3171/jns/2008/108/6/1184 ◽

2008 ◽

Vol 108 (6) ◽

pp. 1184-1191 ◽

Cited By ~ 16

Author(s):

Wenhua Chen ◽

Yilin Yang ◽

Wei Xing ◽

Jianguo Qiu ◽

Ya Peng

Keyword(s):

Computed Tomography ◽

Ct Angiography ◽

Computed Tomography Angiography ◽

Intracranial Aneurysms ◽

Image Interpretation ◽

Multislice Ct ◽

Ct Scanner ◽

Conventional Angiography ◽

Significant Difference

Object The goal of this study was to prospectively compare the effectiveness of 16-slice computed tomography (CT) angiography with that of conventional digital subtraction (DS) angiography and the surgical findings used to detect and characterize intracranial aneurysms. Methods Two hundred forty-four consecutive patients underwent both CT angiography and DS angiography no more than 3 days apart. Computed tomography angiography was performed with a 16-row multislice CT scanner in which a collimation of 0.75 mm was used. Two observers independently reviewed the CT images, and 1 of the 3 attending neuroradiologists reviewed the DS angiograms. They determined the presence, location, quantitation, and characterization of the intracranial aneurysms. Statistical results were calculated independently for the image interpretation performed by the 2 CT scan readers and the DS angiogram reader by using the combination of DS angiography or intraoperative findings or both as a reference standard. Results One hundred thirty-six patients harboring 153 intracranial aneurysms were included in this series. There was no statistically significant difference in sensitivity between 16-slice CT angiography and conventional DS angiography (p > 0.05). The sensitivities of 16-slice CT angiography for aneurysms < 5 mm, 5–10 mm, and > 10 mm were 94.8, 100, and 100%, respectively, on a per-aneurysm basis. The overall sensitivity and specificity of CT angiography for aneurysms were 98.0 and 99.1%, respectively. Sixteen-slice CT angiograms were clearer and more accurate in depicting the relationship of aneurysms to bone structures and adjacent branch vessels. Conclusions Computed tomography angiography using a 16-slice scanner is an accurate tool for detecting and characterizing intracranial aneurysms, including small aneurysms. Noninvasive 16-slice CT angiography will become a viable replacement for conventional DS angiography in the diagnosis and characterization of aneurysms.

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