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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2014; 24(02): 125-128
DOI: 10.4103/0971-3026.134387
Vascular and Interventional Radiology

Automatic scan triggering software "confused": Computed tomography angiography in foot arteriovenous malformation!

Pankaj Gupta
Department of Radio diagnosis and Imaging, Post Graduate Institute of Medical Education and Research, Chandigarh, India
,
Anindita Sinha
Department of Radio diagnosis and Imaging, Post Graduate Institute of Medical Education and Research, Chandigarh, India
,
Niranjan Khandelwal
Department of Radio diagnosis and Imaging, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Abstract

Multidetector computed tomography angiography (MDCTA) has become a well-established modality for limb angiography for a variety of indications. The technique of MDCTA depends on the scanner features including the number of detector rows, rotation speeds and single or dual source energy. Integral to a diagnostic quality CTA is the acquisition timing. Various techniques are available for determining the appropriate timing of scan acquisition which includes fixed delay, test bolus and the bolus tracking technique. The transit times of contrast from the aorta to the peripheral arteries shows a wide variability and is dependent upon the inter individual hemodynamic states. The bolus tracking technique is the most preferred one which allows reliable scan timing with acceptable contrast volume and radiation dose. Pitfalls with all these techniques are well described and we report one such technical pitfall in a case of left foot arteriovenous malformation (AVM) where the bolus tracking technique employed for scan triggering failed to initiate acquisition.

Keywords

Arterio‑venous malformation - bolus tracking - computed tomography angiography - contrast injection


Publikationsverlauf

Artikel online veröffentlicht:
02. August 2021

© 2014. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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