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Vol. 60. Issue 4.
Pages 301-309 (July - August 2018)
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Vol. 60. Issue 4.
Pages 301-309 (July - August 2018)
Radiology through images
DOI: 10.1016/j.rxeng.2018.04.002
Perfusion defects in pulmonary perfusion iodine maps: Causes and semiology
Defectos de perfusión en el mapa de iodo pulmonar: causas y semiología
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A. Bustos Fiore
Corresponding author
, M. González Vázquez, C. Trinidad López, D. Mera Fernández, M. Costas Álvarez
Servicio de Radiodiagnóstico, Hospital POVISA, Vigo, Pontevedra, Spain
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Abstract
Objective

To describe the usefulness of dual-energy CT for obtaining pulmonary perfusion maps to provide morphological and functional information in patients with pulmonary embolisms. To review the semiology of perfusion defects due to pulmonary embolism so they can be differentiated from perfusion defects due to other causes: alterations outside the range used in the iodine map caused by other diseases of the lung parenchyma or artifacts.

Conclusion

CT angiography of the pulmonary arteries is the technique of choice for the diagnosis of pulmonary embolisms. New dual-energy CT scanners are useful for detecting perfusion defects secondary to complete or partial obstruction of pulmonary arteries and is most useful for detecting pulmonary embolisms in subsegmental branches.

Keywords:
Pulmonary embolism
Dual energy
Lung perfusion
Iodine map
Resumen
Objetivo

Describir la utilidad de la tomografía computarizada con energía dual (TCED) en la obtención de mapas de perfusión pulmonar para aportar información morfológica y funcional en el tromboembolismo pulmonar (TEP). Revisar la semiología de los defectos de perfusión debidos a TEP y diferenciarlos de los defectos no debidos a TEP que son alteraciones que quedan fuera del rango utilizado en el mapa de iodo y están causados por otras enfermedades del parénquima pulmonar o por artefactos.

Conclusión

La angiografía por TC de las arterias pulmonares es la técnica de elección en el diagnóstico de TEP. Las nuevas TC con energía dual son útiles para detectar defectos de perfusión secundarios a obstrucción completa o parcial de las arterias pulmonares, y tiene su mayor utilidad en la detección de TEP en ramas subsegmentarias.

Palabras clave:
Tromboembolismo pulmonar
Energía dual
Perfusión pulmonar
Mapa de iodo

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