Orbital volume measured by a low-dose CT scanning technique.
A method for measuring orbital volume using low-dose CT with contiguous 3 mm transaxial sections is described. The accuracy of the method is 1.6%, as demonstrated by comparing CT volume measurements with those derived directly from alginate impressions and on repeat scanning the precision of the measurement was judged as 1.3%. Within the same individual, the right and left orbital volumes were observed to be within 0.6 cm3 (s.d. +/- 0.33 cm3) of each other. This study demonstrates that low-dose CT scanning is a practical method of determining orbital volume and could be used to advantage in the management of traumatic enophthalmos and blow-out fractures of the orbit.
McGurk
M
M
Queen's Medical Centre, University Hospital, Nottingham, UK.
Whitehouse
R W
RW
Taylor
P M
PM
Swinson
B
B
D015841:Enophthalmos / Q000000981:diagnostic imaging*; D006801:Humans; D009915:Orbit / Q000000981:diagnostic imaging*; D009917:Orbital Fractures / Q000000981:diagnostic imaging; D011829:Radiation Dosage; D014057:Tomography, X-Ray Computed