ORIGINAL ARTICLE   

Journal of Neurosurgical Sciences 2018 August;62(4):397-405

DOI: 10.23736/S0390-5616.16.03622-5

Copyright © 2016 EDIZIONI MINERVA MEDICA

language: English

Computed tomography perfusion and computed tomography angiography in vasospasm after subarachnoid hemorrhage

Alessandro STECCO ¹ ✉, Francesco FABBIANO ², Paola AMATUZZO ³, Martina QUAGLIOZZI ³, Eleonora SOLIGO ³, Ignazio DIVENUTO ¹, Gabriele PANZARASA ⁴, Alessandro CARRIERO ²

¹ Unit of Neuroradiology, Department of Radiology, “Maggiore della Carità” Hospital, Piemonte Orientale University, Novara, Italy; ² Unit of Diagnostic and Therapeutic Neuroradiology, Istituto Neurologico Mediterraneo I.R.C.C.S. Nuromed, Pozzilli, Isernia, Italy; ³ Department of Radiology, “Maggiore della Carità” Hospital, Piemonte Orientale University, Novara, Italy; ⁴ Department of Neuorsurgery, “Maggiore della Carità” Hospital, Piemonte Orientale University, Novara, Italy

BACKGROUND: The aim of the study was to evaluate the effectiveness and reliability of a combined computed tomography angiography (CTA) and computed tomography perfusion (CTP) approach in the diagnosis of cerebral vasospasm after subarachnoid hemorrhage.
METHODS: Nineteen patients with clinical signs of arterial vasospasm and positive transcranial Doppler (TCD) were enrolled and underwent CTP. Mean time transit (MTT), cerebral blood flow (CBF) and cerebral blood volume (CBV) values of 20 standardized ROI (regions of interest) were analyzed, and CTA used to measure the gauge of 26 arterial ramifications. CTA measurements were compared with those taken upon hospitalization. Of the 19 patients, 11 were scheduled for digital subtraction angiography (DSA), performed less than 12 hours after execution of the CTA-CTP protocol. The results were compared with findings of DSA and/or clinical follow-up and CT or TCD.
RESULTS: Computed tomography angiography diagnosis of vasospasm was confirmed in all cases (100% sensitivity and 100% specificity), while CTP yielded 3 false negatives (70% sensitivity and 100% specificity). All patients sent for endovascular treatment had received diagnostic confirmation of vasospasm by angiography. CTP thresholds proved reliable in both diagnosis and indicating treatment.
CONCLUSIONS: Combined one-shot CT angiography and CT perfusion represents a valid alternative to DSA in the diagnosis and management of cerebral vasospasm.

KEY WORDS: Perfusion imaging - Computed tomography angiography - Vasoconstriction - Subarachnoid hemorrhage