Il segno dell'angiogramma nelle atelettasie polmonari studiate con Tomografia Computerizzata spirale Incidenza e validità semeiologica

Translated title of the contribution: The angiogram sign in pulmonary atelectasis studied with helical Computed Tomography. Incidence and value

Fabio Sandomenico, Orlando Catalano, Bianca Cusati, Maria Esposito, Alfredo Siani

Research output: Contribution to journalArticle

Abstract

Purpose. We investigated the yield of Helical CT in the study of lung vessels, the incidence of the angiogram sign and its actual value. Material and methods. July 1997 to December 1998, we studied 30 cases of pulmonary collapse of different origin. We found 15 cases of passive collapse (10 from pleural effusion, 2 from diaphragmatic compression, 2 from traumatic pneumothorax, and 1 from isthmic aortic aneurysm), 12 cases of obstructive collapse (9 from bronchogenic carcinoma, 1 from mucoid obstruction, 1 from ilar limphadenopathy, and 1 from mediastinal cancer), 2 cases of adhesive collapse and 1 case of round atelectasis. All the examinations were performed with the Helical technique during nonionic iodinated contrast agent injection (bolus, 300-350 mg/mL); we used an automatic injector set at 2-3 mL/s. We studied the images for the angiogram sign, that is hyperdense bands, usually longer than 2 cm, through the collapsed lung, which correspond to normal pulmonary vascular branches. Results. The angiogram sign was found in 95% of passive (14/15) and in 80% of obstructive (10/12) collapses. However in 2 of those we also found some hyperdense spots referable to vessels seen on transverse slices. The angiogram sign was missing in 1 of 2 adhesive collapses because of vascular distortion from irradiation-related fibrosis. The "comet-tail" vascular pattern was seen in round atelectasis. We had no cases of cicatricial collapse. Conclusions. Thanks to its fast acquisition capabilities, Helical CT well depicts peak vascular enhancement, which permitted identification of the angiogram sign in several pulmonary collapse cases. Thus, this sign becomes even less specific, and just one of the signs of pulmonary consolidation.

Original languageItalian
Pages (from-to)477-481
Number of pages5
JournalRadiologia Medica
Volume98
Issue number6
Publication statusPublished - Dec 1999

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Pulmonary Atelectasis
Spiral Computed Tomography
Angiography
Blood Vessels
Incidence
Lung
Adhesives
Mediastinal Neoplasms
Bronchogenic Carcinoma
Aortic Aneurysm
Pneumothorax
Pleural Effusion
Contrast Media
Fibrosis
Injections

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Il segno dell'angiogramma nelle atelettasie polmonari studiate con Tomografia Computerizzata spirale Incidenza e validità semeiologica. / Sandomenico, Fabio; Catalano, Orlando; Cusati, Bianca; Esposito, Maria; Siani, Alfredo.

In: Radiologia Medica, Vol. 98, No. 6, 12.1999, p. 477-481.

Research output: Contribution to journalArticle

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abstract = "Purpose. We investigated the yield of Helical CT in the study of lung vessels, the incidence of the angiogram sign and its actual value. Material and methods. July 1997 to December 1998, we studied 30 cases of pulmonary collapse of different origin. We found 15 cases of passive collapse (10 from pleural effusion, 2 from diaphragmatic compression, 2 from traumatic pneumothorax, and 1 from isthmic aortic aneurysm), 12 cases of obstructive collapse (9 from bronchogenic carcinoma, 1 from mucoid obstruction, 1 from ilar limphadenopathy, and 1 from mediastinal cancer), 2 cases of adhesive collapse and 1 case of round atelectasis. All the examinations were performed with the Helical technique during nonionic iodinated contrast agent injection (bolus, 300-350 mg/mL); we used an automatic injector set at 2-3 mL/s. We studied the images for the angiogram sign, that is hyperdense bands, usually longer than 2 cm, through the collapsed lung, which correspond to normal pulmonary vascular branches. Results. The angiogram sign was found in 95{\%} of passive (14/15) and in 80{\%} of obstructive (10/12) collapses. However in 2 of those we also found some hyperdense spots referable to vessels seen on transverse slices. The angiogram sign was missing in 1 of 2 adhesive collapses because of vascular distortion from irradiation-related fibrosis. The {"}comet-tail{"} vascular pattern was seen in round atelectasis. We had no cases of cicatricial collapse. Conclusions. Thanks to its fast acquisition capabilities, Helical CT well depicts peak vascular enhancement, which permitted identification of the angiogram sign in several pulmonary collapse cases. Thus, this sign becomes even less specific, and just one of the signs of pulmonary consolidation.",
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