Hilton I. Price

Three-dimensional computer reconstruction from surface contours for head CT examinations.

Abstract: A three-dimensional surface reconstruction algorithm based on contour information from anatomic sites as identified on computed tomography examinations is presented. This algorithm efficiently reconstructs the surfaces between the contours using a triangular “tiling” method. A three-dimensional perspective view of the reconstructed surfaces is provided by a gray scale cathode-ray tube computer graphics system. Volume and surface area estimations are provided as a direct result of the surface reconstruction algorithm. Three cases are presented to illustrate the three-dimensional surface reconstruction algorithm.

The evaluation of head trauma by computed tomography.

A retrospective study of 133 patients with documented head trauma is presented. Computed tomography (C.T.) has replaced cerebral angiography in the evaluation of these patients at our institutions. C.T. provides a rapid noninvasive diagnosis, plus accurate localization of lesions; it also allows for the assessment of multiple lesions. The authors feel that C.T. should be the first neurological mode of investigation after plain skull radiographs. It is important to obtain good quality scans, and intravenous sedation or general anaesthesia may be required.

Computerised tomographic findings in mucoceles of the fontal and ethmoid sinuses

Computerised tomography (CT) is a valuable aid in the investigation of diseases of the paranasal sinuses. Seven patients with surgically proven mucoceles of the frontal or ethmoid sinuses are presented. In each case, proptosis was the main presenting symptom. Although the diagnosis was suspected on plain skull radiographs, CT confirmed the benign nature of the lesion and gave an accurate display of its extent.

Multiple paranasal sinus mucoceles.

The clinical and radiological findings in a 56-year-old woman with mucoceles involving the left frontal, both ethmoidal, sphenoidal, and right maxillary sinuses are presented. The predisposing cause was thought to be previous facial fractures. The rarity of this combination of lesions is discussed, including a brief review of the literature.

Computed tomographic findings in orbital echinococciasis.

Computed tomography findings in a proven orbital hydatid cyst are presented.

The computerised tomographic findings in paediatric orbital tumours

Forty-two patients with histologically proven orbital tumours are presented. CT is of value in the pretreatment assessment and in delineating the extent of the orbital tumour. The surrounding bony destruction and intracranial extension are easily assessed. Post-treatment follow-up can be closely monitored using CT.

The Neuroradiology of Retinoblastoma

Retinoblastoma is the most common intreocular malignant tumor of childhood. Early diagnosis and treatment are essential for long-term patient survival. CT is ideally suited for the study of the orbital and intracranial contents.