Keywords:
Eyes, Head and neck, CT, Computer Applications-Detection, diagnosis, Abscess
Authors:
L. ben temellist, M. Jrad, S. Boukriba, R. Bechraoui, W. Frikha, G. Besbes, H. Mizouni; Tunis/TN
DOI:
10.26044/ecr2019/C-1646
Methods and materials
This was a retrospective study of 30 consecutive patients with orbital cellulitis due to acute ethmoidis treated at the Rabta,
ENT departement.
All patients underwent a CT scan.
The computed tomography were analyzed by a radiologist at Rabta Hospital ,
Radiologic Department.
CT was performed using a 64 channel MDCT scanner (LightSpeed VCT ct99® CT ,
General Electric Healthcare,
Milwaukee,
Wisconsin,
USA) The acquisition of an orbital CT at our institution is done with the following parameters : 0.625 mm slice thickness,
0.3 mm increment,
320 kV,
55 mAs,
218 FOV,
and a 512 × 512 matrix.
The CT is acquired after injection of iodinated contrast material (1 à 2 ml/ kg).
the patient received contrast media with a biphasic injection (an initial bolus of the third of the dose with a flow rate of 1 mL/sec,
and an additional bolus of the remaining quantity with a flow rate of 2 mL/sec started at 30 seconds after the initiation of the first bolus injection).
The scan delay time was 60 seconds after the start of the initial injection.
Patients were classified according to Chandler classification [2] into five categories: I) preseptal cellulitis; II) orbital cellulitis; III) subperiosteal abscess; IV) orbital abscess; and V) cavernous sinus thrombosis.